51
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Banerjee A, Banerjee K, Sinha A, Das S, Majumder S, Majumdar S, Choudhuri SK. A zinc Schiff base complex inhibits cancer progression both in vivo and in vitro by inducing apoptosis. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 56:383-392. [PMID: 29145169 DOI: 10.1016/j.etap.2017.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 11/03/2017] [Accepted: 11/04/2017] [Indexed: 05/25/2023]
Abstract
Cancer chemotherapy suffers from selectivity and undesired toxicity of the drugs. Since zinc is a biocompatible tracer element and cysteine derivatives are used in cancer chemoprevention, we intend to develop a complex of zinc and cysteine-derivatives as potent, non-toxic anticancer agents. Herein, we synthesized and characterized cysteine based ligand, 2-[(2-Hydroxy-3-methoxy-benzylidene)-amino]-3-mercapto-propionic acid and its Zn-complex, which are found to be non-toxic towards normal human PBMC. Data also revealed that only Zn-complex exhibited remarkable apoptosis in drug-sensitive CCRF-CEM and multidrug-resistant CEM/ADR5000 cancer cells as assessed by MTT, Cell cycle and AnnexinV binding assay. Moreover, Zn-complex altered ROS and GSH level of the respective cell lines. Finally, treatment of Zn-complex in Swiss albino mice did not show any systemic toxicity in preliminary trials in normal mice and remarkably increased the life-span of EAC bearing mice. In conclusion, the synthesized Zn-complex may be developed for efficacious, multidrug resistance reversal, non-toxic chemotherapeutic agents in future.
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Affiliation(s)
- Arpita Banerjee
- In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, 37, S.P. Mukherjee Road, Kolkata, 700 026, West Bengal, India; Department of Chemistry, Rammohan College, 102/1, Raja Rammohan Sarani, College Street, Kolkata, West Bengal 700009, India
| | - Kaushik Banerjee
- In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, 37, S.P. Mukherjee Road, Kolkata, 700 026, West Bengal, India
| | - Abhinaba Sinha
- In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, 37, S.P. Mukherjee Road, Kolkata, 700 026, West Bengal, India
| | - Satyajit Das
- In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, 37, S.P. Mukherjee Road, Kolkata, 700 026, West Bengal, India
| | - Saikat Majumder
- Division of Molecular Medicine, Bose Institute, P 1/12, C. I. T. Road, Scheme - VIIM, Kolkata, 700054, West Bengal, India
| | - Subrata Majumdar
- Division of Molecular Medicine, Bose Institute, P 1/12, C. I. T. Road, Scheme - VIIM, Kolkata, 700054, West Bengal, India
| | - Soumitra Kumar Choudhuri
- In Vitro Carcinogenesis and Cellular Chemotherapy, Chittaranjan National Cancer Institute, 37, S.P. Mukherjee Road, Kolkata, 700 026, West Bengal, India.
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52
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Synthetic biology for microbial heavy metal biosensors. Anal Bioanal Chem 2017; 410:1191-1203. [DOI: 10.1007/s00216-017-0751-6] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Revised: 10/23/2017] [Accepted: 11/07/2017] [Indexed: 11/26/2022]
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53
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Aldhaheri SR, Jeelani R, Kohan-Ghadr HR, Khan SN, Mikhael S, Washington C, Morris RT, Abu-Soud HM. Dimercapto-1-propanesulfonic acid (DMPS) induces metaphase II mouse oocyte deterioration. Free Radic Biol Med 2017; 112:445-451. [PMID: 28844937 DOI: 10.1016/j.freeradbiomed.2017.08.015] [Citation(s) in RCA: 7] [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: 05/30/2017] [Revised: 08/16/2017] [Accepted: 08/18/2017] [Indexed: 12/21/2022]
Abstract
In light of the recent lead contamination of the water in Flint, Michigan and its potential adverse outcomes, much research and media attention has turned towards the safety profile of commonly used chelators. Dimercapto-1-propanesulfonic acid (DMPS) typically used in the treatment of lead, mercury and arsenic poisoning also displays a high affinity towards transition metals such as zinc and copper, essential for biological functioning. It is given in series of dosages (0.2-0.4g/day) over a long period, and has the ability to enter cells. In this work, we investigated the mechanism through which increasing concentrations of DMPS alter oocyte quality as judged by changes in microtubule morphology (MT) and chromosomal alignment (CH) of metaphase II mice oocyte. The oocytes were directly exposed to increasing concentration of DMPS (10, 25, 50, 100 and 300μM) for four hours (time of peak plasma concentration after administration) and reactive oxygen species (mainly hydroxyl radical and superoxide) and zinc content were measured. This data showed DMPS plays an important role in deterioration of oocyte quality through a mechanism involving zinc deficiency and enhancement of reactive oxygen species a major contributor to oocyte damage. Our current work, for the first time, demonstrates the possibility of DMPS to negatively impact fertility. This finding can not only help in counseling reproductive age patients undergoing such treatment but also in the development of potential therapies to alleviate oxidative damage and preserve fertility in people receiving heavy metal chelators.
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Affiliation(s)
- Sarah R Aldhaheri
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Roohi Jeelani
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Hamid-Reza Kohan-Ghadr
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Sana N Khan
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Sasha Mikhael
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Christina Washington
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Robert T Morris
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA; Karmanos Cancer Institute, Detroit, MI 48201, USA
| | - Husam M Abu-Soud
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA; Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI 48201, USA.
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54
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Chopade P, Dugasani SR, Kesama MR, Yoo S, Gnapareddy B, Lee YW, Jeon S, Jeong JH, Park SH. Phase, current, absorbance, and photoluminescence of double and triple metal ion-doped synthetic and salmon DNA thin films. NANOTECHNOLOGY 2017; 28:405702. [PMID: 28829333 DOI: 10.1088/1361-6528/aa879b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We fabricated synthetic double-crossover (DX) DNA lattices and natural salmon DNA (SDNA) thin films, doped with 3 combinations of double divalent metal ions (M2+)-doped groups (Co2+-Ni2+, Cu2+-Co2+, and Cu2+-Ni2+) and single combination of a triple M2+-doped group (Cu2+-Ni2+-Co2+) at various concentrations of M2+ ([M2+]). We evaluated the optimum concentration of M2+ ([M2+]O) (the phase of M2+-doped DX DNA lattices changed from crystalline (up to ([M2+]O) to amorphous (above [M2+]O)) and measured the current, absorbance, and photoluminescent characteristics of multiple M2+-doped SDNA thin films. Phase transitions (visualized in phase diagrams theoretically as well as experimentally) from crystalline to amorphous for double (Co2+-Ni2+, Cu2+-Co2+, and Cu2+-Ni2+) and triple (Cu2+-Ni2+-Co2+) dopings occurred between 0.8 mM and 1.0 mM of Ni2+ at a fixed 0.5 mM of Co2+, between 0.6 mM and 0.8 mM of Co2+ at a fixed 3.0 mM of Cu2+, between 0.6 mM and 0.8 mM of Ni2+ at a fixed 3.0 mM of Cu2+, and between 0.6 mM and 0.8 mM of Co2+ at fixed 2.0 mM of Cu2+ and 0.8 mM of Ni2+, respectively. The overall behavior of the current and photoluminescence showed increments as increasing [M2+] up to [M2+]O, then decrements with further increasing [M2+]. On the other hand, absorbance at 260 nm showed the opposite behavior. Multiple M2+-doped DNA thin films can be used in specific devices and sensors with enhanced optoelectric characteristics and tunable multi-functionalities.
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Affiliation(s)
- Prathamesh Chopade
- Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
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55
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Kim Y, Chhor G, Tsai CS, Fox G, Chen CS, Winans NJ, Jedrzejczak R, Joachimiak A, Winans SC. X-ray crystal structures of the pheromone-binding domains of two quorum-hindered transcription factors, YenR of Yersinia enterocolitica and CepR2 of Burkholderia cenocepacia. Proteins 2017; 85:1831-1844. [PMID: 28614901 PMCID: PMC7001585 DOI: 10.1002/prot.25336] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/08/2017] [Accepted: 06/12/2017] [Indexed: 12/17/2022]
Abstract
The ability of LuxR-type proteins to regulate transcription is controlled by bacterial pheromones, N-acylhomoserine lactones (AHLs). Most LuxR-family proteins require their cognate AHLs for activity, and some of them require AHLs for folding and stability, and for protease-resistance. However, a few members of this family are able to fold, dimerize, bind DNA, and regulate transcription in the absence of AHLs; moreover, these proteins are antagonized by their cognate AHLs. One such protein is YenR of Yersinia enterocolitica, which is antagonized by N-3-oxohexanoyl-l-homoserine lactone (OHHL). This pheromone is produced by the OHHL synthase, a product of the adjacent yenI gene. Another example is CepR2 of Burkholderia cenocepacia, which is antagonized by N-octanoyl-l-homoserine lactone (OHL), whose synthesis is directed by the cepI gene of the same bacterium. Here, we describe the high-resolution crystal structures of the AHL binding domains of YenR and CepR2. YenR was crystallized in the presence and absence of OHHL. While this ligand does not cause large scale changes in the YenR structure, it does alter the orientation of several highly conserved YenR residues within and near the pheromone-binding pocket, which in turn caused a significant movement of a surface-exposed loop.
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Affiliation(s)
- Youngchang Kim
- Midwest Center for Structural Genomics, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439
- Structural Biology Center, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439
| | - Gekleng Chhor
- Midwest Center for Structural Genomics, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439
| | - Ching-Sung Tsai
- Department of Microbiology, Cornell University, Ithaca, New York 14853
| | - Gabriel Fox
- Department of Microbiology, Cornell University, Ithaca, New York 14853
| | - Chia-Sui Chen
- Department of Microbiology, Cornell University, Ithaca, New York 14853
| | - Nathan J. Winans
- Department of Microbiology, Cornell University, Ithaca, New York 14853
| | - Robert Jedrzejczak
- Structural Biology Center, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439
| | - Andrzej Joachimiak
- Midwest Center for Structural Genomics, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439
- Structural Biology Center, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois 60637
| | - Stephen C. Winans
- Department of Microbiology, Cornell University, Ithaca, New York 14853
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56
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Bhattacharyya A, Ghosh S, Makhal SC, Guchhait N. Hydrazine bridged coumarin-pyrimidine conjugate as a highly selective and sensitive Zn 2+ sensor: Spectroscopic unraveling of sensing mechanism with practical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 183:306-311. [PMID: 28458235 DOI: 10.1016/j.saa.2017.04.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 04/03/2017] [Accepted: 04/18/2017] [Indexed: 06/07/2023]
Abstract
We report the synthesis and Zn2+ sensing of a novel coumarin-hydrazine conjugate 3-{1-[(4, 6-Dimethyl-pyrimidin-2-yl)-hydrazono]-ethyl}-chromen-2-one (3). Compound 3 can act as a neat fluorescent Zn2+ sensor by an increment in fluorescence intensity along with an appreciable red shift. Fluorescence enhancement is caused by complexation through cis-trans isomerization process in the presence of Zn2+ ion. The practical utility of 3 was demonstrated by successful test kit experiment to detect Zn2+ in water under UV-light.
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Affiliation(s)
| | - Soumen Ghosh
- Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
| | | | - Nikhil Guchhait
- Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
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57
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Pan S, Tang H, Song Z, Li J, Guo Y. A Novel Dual Channel Fluorescent Probe for Ca2+
and Zn2+
Based on a Coumarin Schiff Base. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600923] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shengnan Pan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education; College of Chemistry and Materials Science, Northwest University; Xi'an Shaanxi 710127 China
| | - Haoyang Tang
- School of Automation; Xi'an University of Posts and Telecommunications; Xi'an Shaanxi 710121 China
| | - Zhanke Song
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education; College of Chemistry and Materials Science, Northwest University; Xi'an Shaanxi 710127 China
| | - Jin Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education; College of Chemistry and Materials Science, Northwest University; Xi'an Shaanxi 710127 China
| | - Yuan Guo
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education; College of Chemistry and Materials Science, Northwest University; Xi'an Shaanxi 710127 China
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58
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Saha RP, Samanta S, Patra S, Sarkar D, Saha A, Singh MK. Metal homeostasis in bacteria: the role of ArsR-SmtB family of transcriptional repressors in combating varying metal concentrations in the environment. Biometals 2017; 30:459-503. [PMID: 28512703 DOI: 10.1007/s10534-017-0020-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 05/09/2017] [Indexed: 02/02/2023]
Abstract
Bacterial infections cause severe medical problems worldwide, resulting in considerable death and loss of capital. With the ever-increasing rise of antibiotic-resistant bacteria and the lack of development of new antibiotics, research on metal-based antimicrobial therapy has now gained pace. Metal ions are essential for survival, but can be highly toxic to organisms if their concentrations are not strictly controlled. Through evolution, bacteria have acquired complex metal-management systems that allow them to acquire metals that they need for survival in different challenging environments while evading metal toxicity. Metalloproteins that controls these elaborate systems in the cell, and linked to key virulence factors, are promising targets for the anti-bacterial drug development. Among several metal-sensory transcriptional regulators, the ArsR-SmtB family displays greatest diversity with several distinct metal-binding and nonmetal-binding motifs that have been characterized. These prokaryotic metolloregulatory transcriptional repressors represses the expression of operons linked to stress-inducing concentrations of metal ions by directly binding to the regulatory regions of DNA, while derepression results from direct binding of metal ions by these homodimeric proteins. Many bacteria, e.g., Mycobacterium tuberculosis, Bacillus anthracis, etc., have evolved to acquire multiple metal-sensory motifs which clearly demonstrate the importance of regulating concentrations of multiple metal ions. Here, we discussed the mechanisms of how ArsR-SmtB family regulates the intracellular bioavailability of metal ions both inside and outside of the host. Knowledge of the metal-challenges faced by bacterial pathogens and their survival strategies will enable us to develop the next generation drugs.
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Affiliation(s)
- Rudra P Saha
- Department of Biotechnology, School of Biotechnology, Adamas University, Kolkata, 700126, India.
| | - Saikat Samanta
- Department of Microbiology, School of Science, Adamas University, Kolkata, 700126, India
| | - Surajit Patra
- Department of Biotechnology, School of Biotechnology, Adamas University, Kolkata, 700126, India
| | - Diganta Sarkar
- Department of Biotechnology, Techno India University, Kolkata, 700091, India
| | - Abinit Saha
- Department of Biotechnology, School of Biotechnology, Adamas University, Kolkata, 700126, India
| | - Manoj Kumar Singh
- Department of Biotechnology, School of Biotechnology, Adamas University, Kolkata, 700126, India
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59
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Singh N, Yadav KK, Rajasekharan R. Effect of zinc deprivation on the lipid metabolism of budding yeast. Curr Genet 2017; 63:977-982. [PMID: 28500379 DOI: 10.1007/s00294-017-0704-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 05/04/2017] [Accepted: 05/07/2017] [Indexed: 12/21/2022]
Abstract
Zinc is an essential micronutrient for all living cells. It serves as a structural and catalytic cofactor for numerous proteins, hence maintaining a proper level of cellular zinc is essential for normal functioning of the cell. Zinc homeostasis is sustained through various ways under severe zinc-deficient conditions. Zinc-dependent proteins play an important role in biological systems and limitation of zinc causes a drastic change in their expression. In budding yeast, a zinc-responsive transcription factor Zap1p controls the expression of genes required for uptake and mobilization of zinc under zinc-limiting conditions. It also regulates the polar lipid levels under zinc-limiting conditions to maintain membrane integrity. Deletion of ZAP1 causes an increase in triacylglyerol levels which is due to the increased biosynthesis of acetate that serves as a precursor for triacylglycerol biosynthesis. In this review, we expanded our recent work role of Zap1p in nonpolar lipid metabolism of budding yeast.
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Affiliation(s)
- Neelima Singh
- Department of Lipid Science, Council of Scientific and Industrial Research (CSIR), Central Food Technological Research Institute (CFTRI), Mysore, 570020, Karnataka, India
| | - Kamlesh Kumar Yadav
- Department of Lipid Science, Council of Scientific and Industrial Research (CSIR), Central Food Technological Research Institute (CFTRI), Mysore, 570020, Karnataka, India
| | - Ram Rajasekharan
- Department of Lipid Science, Council of Scientific and Industrial Research (CSIR), Central Food Technological Research Institute (CFTRI), Mysore, 570020, Karnataka, India.
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60
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Lin L, Hu Y, Zhang L, Huang Y, Zhao S. Photoluminescence light-up detection of zinc ion and imaging in living cells based on the aggregation induced emission enhancement of glutathione-capped copper nanoclusters. Biosens Bioelectron 2017; 94:523-529. [PMID: 28343105 DOI: 10.1016/j.bios.2017.03.038] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 03/07/2017] [Accepted: 03/17/2017] [Indexed: 01/03/2023]
Abstract
In this work, we prepared glutathione (GSH)-capped copper nanoclusters (Cu NCs) with red emission by simply adjusting the pH of GSH/Cu2+ mixture at room temperature. A photoluminescence light-up method for detecting Zn2+ was then developed based on the aggregation induced emission enhancement of GSH-capped Cu NCs. Zn2+ could trigger the aggregation of Cu NCs, inducing the enhancement of luminescence and the increase of absolute quantum yield from 1.3% to 6.2%. GSH-capped Cu NCs and the formed aggregates were characterized, and the possible mechanism was also discussed. The prepared GSH-capped Cu NCs exhibited a fast response towards Zn2+ and a wider detection range from 4.68 to 2240μM. The detection limit (1.17μM) is much lower than that of the World Health Organization permitted in drinking water. Furthermore, taking advantages of the low cytotoxicity, large Stokes shift, red emission and light-up detection mode, we explored the use of the prepared GSH-capped Cu NCs in the imaging of Zn2+ in living cells. The developed luminescence light-up nanoprobe may hold the potentials for Zn2+-related drinking water safety and biological applications.
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Affiliation(s)
- Liyun Lin
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Yuefang Hu
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Liangliang Zhang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China.
| | - Yong Huang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Shulin Zhao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China.
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61
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Murakami K, Yoshino M. Zinc inhibition of pyruvate kinase of M-type isozyme. Biometals 2017; 30:335-340. [PMID: 28293755 DOI: 10.1007/s10534-017-0009-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Accepted: 03/07/2017] [Indexed: 11/25/2022]
Abstract
Inhibitory effect of Zn on the pyruvate kinase of M (muscle)-type isozyme was analyzed for the purpose of elucidating the cytotoxicity of Zn. Zn inhibited pyruvate kinase uncompetitively with respect to the substrate PEP, and competitively with respect to ADP. Quotient velocity plot calculated from the Zn-inhibition curves showed that Zn2+ as a ZnADP complex acted as competitive and uncompetitive inhibitors of the enzyme with respect to the substrate ADP and PEP, respectively: Zn2+ forms a ZnADP complex, which may bind to the ADP-binding site of the free enzyme with the Ki value of 1.4 μM causing competitive inhibition, or to the ADP-site of the enzyme-PEP complex with 2.6 μM resulting in uncompetitive inhibition. The inhibition of pyruvate kinase by Zn2+ may be responsible for the cytotoxicity of this metal by decreasing glycolytic flux.
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Affiliation(s)
- Keiko Murakami
- Department of Biochemistry, Aichi Medical University School of Medicine, Yazako-karimata 1-1, Nagakute, Aichi, 480-1195, Japan
| | - Masataka Yoshino
- Department of Biochemistry, Aichi Medical University School of Medicine, Yazako-karimata 1-1, Nagakute, Aichi, 480-1195, Japan.
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62
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Tomovic DL, Bukonjic AM, Kocovic A, Nikolic MV, Mijajlovic MZ, Jevtic VV, Ratkovic ZR, Arsenijevic AN, Milovanovic JZ, Stojanovic B, Trifunovic SR, Radic GP. Synthesis, Characterization, and Cytotoxicity of Binuclear Cooper(II)-Complexes with some S-Alkenyl Derivatives of Thiosalicyclic Acid. SERBIAN JOURNAL OF EXPERIMENTAL AND CLINICAL RESEARCH 2017. [DOI: 10.1515/sjecr-2016-0071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
New complexes of copper(II) with S-alkenyl derivatives of thiosalicylic acid (alkenyl = propenyl-(L1), isobutenyl-(L2)) have been synthesized and characterized by microanalysis, infrared spectra, magnetic measurements, and by NMR spectra. The cytotoxic activity of two newly synthesized precursor S-alkenyl derivatives of thiosalicylic acid were tested using an MTT colorimetric technique on HCT-116 human colon carcinoma cells. The cytotoxic effect of the copper(II)- complexes were higher compared to the cytotoxicity of the corresponding ligand (for concentrations from 31.25 to 250 μM). Copper(II)-complexes showed a slightly lower cytotoxicity compared to cisplatin. Complexes of copper(II) with S-alkenyl derivatives of thiosalicylic acid (at concentrations from 250 to 1000 μM) had a cytotoxic effect on HCT-116 cells compared to cisplatin.
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Affiliation(s)
| | | | | | | | | | - Verica V. Jevtic
- Department of Chemistry, Faculty of Science, University of Kragujevac, Serbia
| | - Zoran R. Ratkovic
- Department of Chemistry, Faculty of Science, University of Kragujevac, Serbia
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63
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Dong YJ, Li XL, Zhang Y, Dong WK. A highly selective visual and fluorescent sensor for Pb2+ and Zn2+ and crystal structure of Cu2+ complex based-on a novel single-armed Salamo-type bisoxime. Supramol Chem 2017. [DOI: 10.1080/10610278.2017.1285031] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Yin-Juan Dong
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
| | - Xia-Liang Li
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, PR China
| | - Yang Zhang
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
| | - Wen-Kui Dong
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
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64
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Pramanik S, Bhalla V, Kumar M. Hexaphenylbenzene-based fluorescent aggregates for detection of zinc and pyrophosphate ions in aqueous media: tunable self-assembly behaviour and construction of a logic device. NEW J CHEM 2017. [DOI: 10.1039/c6nj03953g] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aggregates of HPB derivative 7 exhibited “on–on” response towards Zn2+ ions and this in situ prepared 7-Zn2+ ensemble was utilized as a “not quenched” probe for detection of PPi ions in aqueous media.
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Affiliation(s)
- Subhamay Pramanik
- Department of Chemistry
- UGC Sponsored Centre for Advanced Studies-II
- Guru Nanak Dev University
- Amritsar 143005
- India
| | - Vandana Bhalla
- Department of Chemistry
- UGC Sponsored Centre for Advanced Studies-II
- Guru Nanak Dev University
- Amritsar 143005
- India
| | - Manoj Kumar
- Department of Chemistry
- UGC Sponsored Centre for Advanced Studies-II
- Guru Nanak Dev University
- Amritsar 143005
- India
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65
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Du K, Niu S, Qiao L, Dou Y, Zhu Q, Chen X, Zhang P. A highly selective ratiometric fluorescent probe for the cascade detection of Zn2+ and H2PO4− and its application in living cell imaging. RSC Adv 2017. [DOI: 10.1039/c7ra08020d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple ratiometric sensor (L1) for the cascade detection of Zn2+ and H2PO4− with high selectivity was reported based on the intermolecular charge transfer (ICT) mechanism.
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Affiliation(s)
- Kui Du
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- P. R. China
| | - Shizhen Niu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- P. R. China
| | - Li Qiao
- College of Material Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou
- P. R. China
| | - Yandong Dou
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province
- College of Biotechnology and Bioengineering
- Hangzhou 310014
- China
| | - Qing Zhu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province
- College of Biotechnology and Bioengineering
- Hangzhou 310014
- China
| | - Xinzhi Chen
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- P. R. China
| | - Pengfei Zhang
- College of Material Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou
- P. R. China
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66
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Schalk IJ, Cunrath O. An overview of the biological metal uptake pathways in Pseudomonas aeruginosa. Environ Microbiol 2016; 18:3227-3246. [PMID: 27632589 DOI: 10.1111/1462-2920.13525] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 09/07/2016] [Indexed: 12/21/2022]
Abstract
Biological metal ions, including Co, Cu, Fe, Mg, Mn, Mo, Ni and Zn ions, are necessary for the survival and the growth of all microorganisms. Their biological functions are linked to their particular chemical properties: they play a role in structuring macromolecules and/or act as co-factors catalyzing diverse biochemical reactions. These metal ions are also essential for microbial pathogens during infection: they are involved in bacterial metabolism and various virulence factor functions. Therefore, during infection, bacteria need to acquire biological metal ions from the host such that there is competition for these ions between the bacterium and the host. Evidence is increasingly emerging of "nutritional immunity" against pathogens in the hosts; this includes strategies making access to metals difficult for infecting bacteria. It is clear that biological metals play key roles during infection and in the battle between the pathogens and the host. Here, we summarize current knowledge about the strategies used by Pseudomonas aeruginosa to access the various biological metals it requires. P. aeruginosa is a medically significant Gram-negative bacterial opportunistic pathogen that can cause severe chronic lung infections in cystic fibrosis patients and that is responsible for nosocomial infections worldwide.
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Affiliation(s)
- Isabelle J Schalk
- UMR 7242, Université de Strasbourg-CNRS, ESBS, Blvd Sébastien Brant, F-67413, Illkirch, Strasbourg, France.
| | - Olivier Cunrath
- UMR 7242, Université de Strasbourg-CNRS, ESBS, Blvd Sébastien Brant, F-67413, Illkirch, Strasbourg, France
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67
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Li Y, Li K, He J. A “turn-on” fluorescent chemosensor for the detection of Zn(II) in aqueous solution at neutral pH and its application in live cells imaging. Talanta 2016; 153:381-5. [DOI: 10.1016/j.talanta.2016.03.040] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 03/04/2016] [Accepted: 03/12/2016] [Indexed: 01/22/2023]
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68
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Shyamal M, Mazumdar P, Maity S, Samanta S, Sahoo GP, Misra A. Highly Selective Turn-On Fluorogenic Chemosensor for Robust Quantification of Zn(II) Based on Aggregation Induced Emission Enhancement Feature. ACS Sens 2016. [DOI: 10.1021/acssensors.6b00289] [Citation(s) in RCA: 144] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Milan Shyamal
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore-721102, West Bengal, India
| | - Prativa Mazumdar
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore-721102, West Bengal, India
| | - Samir Maity
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore-721102, West Bengal, India
| | - Sadhan Samanta
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore-721102, West Bengal, India
| | - Gobinda P. Sahoo
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore-721102, West Bengal, India
| | - Ajay Misra
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore-721102, West Bengal, India
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69
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Cellular Zinc Homeostasis Contributes to Neuronal Differentiation in Human Induced Pluripotent Stem Cells. Neural Plast 2016; 2016:3760702. [PMID: 27247802 PMCID: PMC4876239 DOI: 10.1155/2016/3760702] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 03/24/2016] [Indexed: 11/23/2022] Open
Abstract
Disturbances in neuronal differentiation and function are an underlying factor of many brain disorders. Zinc homeostasis and signaling are important mediators for a normal brain development and function, given that zinc deficiency was shown to result in cognitive and emotional deficits in animal models that might be associated with neurodevelopmental disorders. One underlying mechanism of the observed detrimental effects of zinc deficiency on the brain might be impaired proliferation and differentiation of stem cells participating in neurogenesis. Thus, to examine the molecular mechanisms regulating zinc metabolism and signaling in differentiating neurons, using a protocol for motor neuron differentiation, we characterized the expression of zinc homeostasis genes during neurogenesis using human induced pluripotent stem cells (hiPSCs) and evaluated the influence of altered zinc levels on the expression of zinc homeostasis genes, cell survival, cell fate, and neuronal function. Our results show that zinc transporters are highly regulated genes during neuronal differentiation and that low zinc levels are associated with decreased cell survival, altered neuronal differentiation, and, in particular, synaptic function. We conclude that zinc deficiency in a critical time window during brain development might influence brain function by modulating neuronal differentiation.
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70
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Philips DS, Sreejith S, He T, Menon NV, Anees P, Mathew J, Sajikumar S, Kang Y, Stuparu MC, Sun H, Zhao Y, Ajayaghosh A. A Three-Photon Active Organic Fluorophore for Deep Tissue Ratiometric Imaging of Intracellular Divalent Zinc. Chem Asian J 2016; 11:1523-7. [PMID: 26991763 DOI: 10.1002/asia.201600170] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Indexed: 11/10/2022]
Abstract
Deep tissue bioimaging with three-photon (3P) excitation using near-infrared (NIR) light in the second IR window (1.0-1.4 μm) could provide high resolution images with an improved signal-to-noise ratio. Herein, we report a photostable and nontoxic 3P excitable donor-π-acceptor system (GMP) having 3P cross-section (σ3 ) of 1.78×10(-80) cm(6) s(2) photon(-2) and action cross-section (σ3 η3 ) of 2.31×10(-81) cm(6) s(2) photon(-2) , which provides ratiometric fluorescence response with divalent zinc ions in aqueous conditions. The probe signals the Zn(2+) binding at 530 and 600 nm, respectively, upon 1150 nm excitation with enhanced σ3 of 1.85×10(-80) cm(6) s(2) photon(-2) and σ3 η3 of 3.33×10(-81) cm(6) s(2) photon(-2) . The application of this probe is demonstrated for ratiometric 3P imaging of Zn(2+) in vitro using HuH-7 cell lines. Furthermore, the Zn(2+) concentration in rat hippocampal slices was imaged at 1150 nm excitation after incubation with GMP, illustrating its potential as a 3P ratiometric probe for deep tissue Zn(2+) ion imaging.
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Affiliation(s)
- Divya Susan Philips
- Photosciences and Photonics Group, Chemical Sciences and Technology Division and Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, 695019, India
| | - Sivaramapanicker Sreejith
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore.
| | - Tingchao He
- College of Physics and Technology, Shenzhen University, Shenzhen, 518060, China.,Division of Physics and Applied Physics, Centre for Disruptive Photonic Technologies (CDPT), School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore
| | - Nishanth Venugopal Menon
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore, Singapore
| | - Palapuravan Anees
- Photosciences and Photonics Group, Chemical Sciences and Technology Division and Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, 695019, India
| | - Jomon Mathew
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 2, Tsukuba, 3058568, Japan
| | - Sreedharan Sajikumar
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore, Singapore
| | - Yuejun Kang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore, Singapore
| | - Mihaiela Corina Stuparu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore
| | - Handong Sun
- Division of Physics and Applied Physics, Centre for Disruptive Photonic Technologies (CDPT), School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore.
| | - Yanli Zhao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore.
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Group, Chemical Sciences and Technology Division and Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, 695019, India.
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71
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Condensation Product of Phenylalanine and Salicylaldehyde: Fluorescent Sensor for Zn2+. J Fluoresc 2016; 26:899-904. [DOI: 10.1007/s10895-016-1778-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/02/2016] [Indexed: 10/22/2022]
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72
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Porto TV, Wilson MT, Worrall JAR. Copper and nickel bind via two distinct kinetic mechanisms to a CsoR metalloregulator. Dalton Trans 2016; 44:20176-85. [PMID: 26536457 DOI: 10.1039/c5dt03484a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The intricate interplay between polypeptide and metal ion binding underscores many of life's fundamental processes. Metalloregulators recognise and bind cognate metal ions during cellular metal stress, evoking a transcriptional response so as to maintain metal ion homeostasis. Members of the copper sensitive operon repressor (CsoR) family of metalloregulators bind to their operator DNA in the absence of a bound metal ion, but on binding Cu(I) an allosteric conformational switch is induced that causes dissociation of the bound DNA. Other divalent metal ions are capable of binding to CsoR members but do not induce the allosteric response observed with Cu(I). The thermodynamics of Cu(I) binding has been studied in this family of metalloregulators, but the binding kinetics and mechanism of Cu(I) or a non-cognate metal ion is unknown. In the present study we have used stopped-flow absorbance kinetics and site-directed variants of the CsoR from Streptomyces lividans to monitor binding of Cu(I) and non-cognate Ni(II). The variants have been designed to individually replace known metal ion binding ligands and also to test the role of a histidine residue (His103) close, but not considered part of the Cu(I) first coordination sphere. Cu(I)/Ni(II) ion displacement studies have also been investigated. The kinetic data are most consistent with the existence of two distinct mechanisms that account for Cu(I) and Ni(II) ion binding to this CsoR. In particular Ni(II) has two binding sites; one that has identical amino acid coordination as the Cu(I) binding site and the second involving His103, a residue determined here not to be involved in the mechanism of Cu(I) binding.
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Affiliation(s)
- Tatiana V Porto
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK.
| | - Michael T Wilson
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK.
| | - Jonathan A R Worrall
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK.
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73
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Sinha S, Gaur P, Dev S, Mukherjee T, Mathew J, Mukhopadhyay S, Ghosh S. Highly photostable zinc selective molecular marker bearing flexible pivotal unit: opto-fluorescence enhancement effect and imaging applications in living systems. Dalton Trans 2016; 44:9506-15. [PMID: 25919349 DOI: 10.1039/c5dt00713e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel molecular probes for imaging zinc in biological systems are gaining interest as they help in understanding the role of zinc in regulating various bio-events. In this regard, a new C2-symmetric molecular system has been developed and successfully applied as light-up material for signaling divalent zinc with green emission. The fluorescence enhancement was highly zinc specific and this newly developed probe bears a submicromolar detection capability. While probe and the ensemble -Zn(2+) exhibited remarkably high photostability, light-triggered fluorescence enhancement was observed in the case of -Zn(2+). The nature of the -Zn(2+) complex and the associated spectral shift are further supported by theoretical calculations. As the present probe absorbs in the visible region and emits in the green, it was preferred as a potential material for imaging zinc in biological systems including animal and plant cells such as pollen grains and fish egg cells. Such fluorescence imaging of zinc revealed the efficacy of the probe in detection and localization of zinc in various biological systems.
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Affiliation(s)
- Sougata Sinha
- School of Basic Sciences, Indian Institute of Technology Mandi, Mandi-175001, H.P., India.
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74
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A Turn-on Fluorescent Chemosensor for Zn2+ Based on Quinoline in Aqueous Media. J Fluoresc 2016; 26:835-44. [DOI: 10.1007/s10895-016-1771-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 01/14/2016] [Indexed: 11/26/2022]
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75
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Huang S, Yang BZ, Jiang XF, Ren AM. Computational design of zinc-ion-responsive two-photon fluorescent probes with conjugated multi-structures. J Mol Model 2016; 22:34. [PMID: 26781662 DOI: 10.1007/s00894-015-2887-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 12/10/2015] [Indexed: 11/28/2022]
Abstract
A series of conjugated multi-structured fluorescent probe molecules based on a salen ligand were designed and investigated in dimethyl sulfoxide solvent using a quantum-chemical method. The results indicate that the one-photon absorption and fluorescence emission spectra (λ (O) and λ (EM)) of these molecules generally show redshifts (of 23.1-74.5 and 22.7-116.6 nm, respectively) upon the coordination of the molecules to Zn(2+). Large Stokes shifts (1511.2-11744.1 cm(-1)) were found for the molecules, meaning that interference between λ (O) and λ (EM) can be avoided for these molecules. The two-photon absorption spectra of the molecules usually present blueshifts, but the two-photon absorption cross-section (δ) greatly increases (by 221.5-868.0 GM) upon the coordination of the molecules with Zn(2+). Most of the molecules show strong two-photon absorption peaks in the range 678.2-824.4 nm, i.e., in the near-infrared region. In a word, the expanded π-conjugated frameworks of these molecules lead to redshifted λ (O) and λ (EM) and enhanced δ values. Moreover, (L-phenyl)2 and (L-phenyl-ethynyl)2 are the most suitable of the multi-structured molecules examined in this work for use as two-photon fluorescent probes for zinc ion detection in vivo. Graphical Abstract Scheme of the calculated transition energies (E0k and E0n) and the transition dipole moments (M0k and Mkn). NTO 109, NTO 197 and NTO 228 of Zn(L-phenyl-ethynyl), Zn2(L-phenyl-ethynyl)2 and Zn3(L-phenyl)3 for one-photon absorption, respectively.
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Affiliation(s)
- Shuang Huang
- School of Mathematics and Physics, Changzhou University, Changzhou, 213164, People's Republic of China.,State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Hangzhou, People's Republic of China
| | - Bao-Zhu Yang
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People's Republic of China.
| | - Xing-Fang Jiang
- School of Mathematics and Physics, Changzhou University, Changzhou, 213164, People's Republic of China.,State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Hangzhou, People's Republic of China
| | - Ai-Min Ren
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, 130023, People's Republic of China
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76
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Bansal D, Gupta R. Chemosensors containing appended benzothiazole group(s): selective binding of Cu2+and Zn2+ions by two related receptors. Dalton Trans 2016; 45:502-7. [DOI: 10.1039/c5dt03669k] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amide-benzothiazole based molecules act as highly selective chemosensors for Cu(ii) and Zn(ii) ions both in solution and in the solid-state.
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Affiliation(s)
- Deepak Bansal
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
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77
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Wang P, Wu J, Su P, Shan C, Zhou P, Ge Y, Liu D, Liu W, Tang Y. A novel fluorescent chemosensor based on tetra-peptides for detecting zinc ions in aqueous solutions and live cells. J Mater Chem B 2016; 4:4526-4533. [DOI: 10.1039/c6tb00794e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A novel fluorescent chemosensor (HL) based on tetra-peptides conjugated with dansyl groups has been designed and synthesized, which is a promising analytical tool for detecting Zn2+ in aqueous solutions and live cells.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Jiang Wu
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Pingru Su
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Changfu Shan
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Panpan Zhou
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Yushu Ge
- Collaborative Innovation Center of Chemistry for Life Sciences
- School of Life Sciences
- University of Sciences and Technology of China
- Hefei
- P. R. China
| | - Dan Liu
- Collaborative Innovation Center of Chemistry for Life Sciences
- School of Life Sciences
- University of Sciences and Technology of China
- Hefei
- P. R. China
| | - Weisheng Liu
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Yu Tang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
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78
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Kumari B, Lohar S, Ghosh M, Ta S, Sengupta A, Banerjee PP, Chattopadhyay A, Das D. Structurally Characterized Zn2+ Selective Ratiometric Fluorescence Probe in 100 % Water for HeLa Cell Imaging: Experimental and Computational Studies. J Fluoresc 2015; 26:87-103. [DOI: 10.1007/s10895-015-1688-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 10/07/2015] [Indexed: 11/29/2022]
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79
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Metalloregulator CueR biases RNA polymerase's kinetic sampling of dead-end or open complex to repress or activate transcription. Proc Natl Acad Sci U S A 2015; 112:13467-72. [PMID: 26483469 DOI: 10.1073/pnas.1515231112] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Metalloregulators respond to metal ions to regulate transcription of metal homeostasis genes. MerR-family metalloregulators act on σ(70)-dependent suboptimal promoters and operate via a unique DNA distortion mechanism in which both the apo and holo forms of the regulators bind tightly to their operator sequence, distorting DNA structure and leading to transcription repression or activation, respectively. It remains unclear how these metalloregulator-DNA interactions are coupled dynamically to RNA polymerase (RNAP) interactions with DNA for transcription regulation. Using single-molecule FRET, we study how the copper efflux regulator (CueR)--a Cu(+)-responsive MerR-family metalloregulator--modulates RNAP interactions with CueR's cognate suboptimal promoter PcopA, and how RNAP affects CueR-PcopA interactions. We find that RNAP can form two noninterconverting complexes at PcopA in the absence of nucleotides: a dead-end complex and an open complex, constituting a branched interaction pathway that is distinct from the linear pathway prevalent for transcription initiation at optimal promoters. Capitalizing on this branched pathway, CueR operates via a "biased sampling" instead of "dynamic equilibrium shifting" mechanism in regulating transcription initiation; it modulates RNAP's binding-unbinding kinetics, without allowing interconversions between the dead-end and open complexes. Instead, the apo-repressor form reinforces the dominance of the dead-end complex to repress transcription, and the holo-activator form shifts the interactions toward the open complex to activate transcription. RNAP, in turn, locks CueR binding at PcopA into its specific binding mode, likely helping amplify the differences between apo- and holo-CueR in imposing DNA structural changes. Therefore, RNAP and CueR work synergistically in regulating transcription.
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80
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Porto TV, Hough MA, Worrall JAR. Structural insights into conformational switching in the copper metalloregulator CsoR from Streptomyces lividans. ACTA ACUST UNITED AC 2015; 71:1872-8. [PMID: 26327377 DOI: 10.1107/s1399004715013012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 07/06/2015] [Indexed: 11/10/2022]
Abstract
Copper-sensitive operon repressors (CsoRs) act to sense cuprous ions and bind them with a high affinity under copper stress in many bacteria. The binding of copper(I) leads to a conformational change in their homotetramer structure, causing disassembly of the operator DNA-CsoR complex and evoking a transcriptional response. Atomic-level structural insight into the conformational switching mechanism between the apo and metal-bound states is lacking. Here, a new X-ray crystal structure of the CsoR from Streptomyces lividans is reported and compared with a previously reported S. lividans CsoR X-ray structure crystallized under different conditions. Based on evidence from this new X-ray structure, it is revealed that the conformational switching between states centres on a concertina effect at the C-terminal end of each α2 helix in the homotetramer. This drives the Cys104 side chain, a copper(I)-ligating residue, into a position enabling copper(I) coordination and as a result disrupts the α2-helix geometry, leading to a compacting and twisting of the homotetramer structure. Strikingly, the conformational switching induces a redistribution of electrostatic surface potential on the tetrameric DNA-binding face, which in the copper(I)-bound state would no longer favour interaction with the mode of operator DNA binding.
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Affiliation(s)
- Tatiana V Porto
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England
| | - Michael A Hough
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England
| | - Jonathan A R Worrall
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England
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81
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Jullien AS, Gateau C, Lebrun C, Delangle P. Mercury Complexes with Tripodal Pseudopeptides Derived fromD-Penicillamine Favour a HgS3Coordination. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500421] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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82
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Martín-Betancor K, Rodea-Palomares I, Muñoz-Martín MA, Leganés F, Fernández-Piñas F. Construction of a self-luminescent cyanobacterial bioreporter that detects a broad range of bioavailable heavy metals in aquatic environments. Front Microbiol 2015; 6:186. [PMID: 25806029 PMCID: PMC4353254 DOI: 10.3389/fmicb.2015.00186] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 02/19/2015] [Indexed: 11/13/2022] Open
Abstract
A self-luminescent bioreporter strain of the unicellular cyanobacterium Synechococcus sp. PCC 7942 was constructed by fusing the promoter region of the smt locus (encoding the transcriptional repressor SmtB and the metallothionein SmtA) to luxCDABE from Photorhabdus luminescens; the sensor smtB gene controlling the expression of smtA was cloned in the same vector. The bioreporter performance was tested with a range of heavy metals and was shown to respond linearly to divalent Zn, Cd, Cu, Co, Hg, and monovalent Ag. Chemical modeling was used to link bioreporter response with metal speciation and bioavailability. Limits of Detection (LODs), Maximum Permissive Concentrations (MPCs) and dynamic ranges for each metal were calculated in terms of free ion concentrations. The ranges of detection varied from 11 to 72 pM for Hg2+ (the ion to which the bioreporter was most sensitive) to 1.54–5.35 μM for Cd2+ with an order of decreasing sensitivity as follows: Hg2+ >> Cu2+ >> Ag+ > Co2+ ≥ Zn2+ > Cd2+. However, the maximum induction factor reached 75-fold in the case of Zn2+ and 56-fold in the case of Cd2+, implying that Zn2+ is the preferred metal in vivo for the SmtB sensor, followed by Cd2+, Ag+ and Cu2+ (around 45–50-fold induction), Hg2+ (30-fold) and finally Co2+ (20-fold). The bioreporter performance was tested in real environmental samples with different water matrix complexity artificially contaminated with increasing concentrations of Zn, Cd, Ag, and Cu, confirming its validity as a sensor of free heavy metal cations bioavailability in aquatic environments.
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Affiliation(s)
| | | | - M A Muñoz-Martín
- Department of Biology, Universidad Autónoma de Madrid Madrid, Spain
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83
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Mandal S, Das G, Askari H. A combined experimental and quantum mechanical investigation on some selected metal complexes of l-serine with first row transition metal cations. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.10.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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84
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Que EL, Bleher R, Duncan FE, Kong BY, Gleber SC, Vogt S, Chen S, Garwin SA, Bayer AR, Dravid V, Woodruff TK, O’Halloran TV. Quantitative mapping of zinc fluxes in the mammalian egg reveals the origin of fertilization-induced zinc sparks. Nat Chem 2015; 7:130-9. [PMID: 25615666 PMCID: PMC4315321 DOI: 10.1038/nchem.2133] [Citation(s) in RCA: 158] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 11/11/2014] [Indexed: 12/22/2022]
Abstract
Fertilization of a mammalian egg initiates a series of 'zinc sparks' that are necessary to induce the egg-to-embryo transition. Despite the importance of these zinc-efflux events little is known about their origin. To understand the molecular mechanism of the zinc spark we combined four physical approaches that resolve zinc distributions in single cells: a chemical probe for dynamic live-cell fluorescence imaging and a combination of scanning transmission electron microscopy with energy-dispersive spectroscopy, X-ray fluorescence microscopy and three-dimensional elemental tomography for high-resolution elemental mapping. We show that the zinc spark arises from a system of thousands of zinc-loaded vesicles, each of which contains, on average, 10(6) zinc atoms. These vesicles undergo dynamic movement during oocyte maturation and exocytosis at the time of fertilization. The discovery of these vesicles and the demonstration that zinc sparks originate from them provides a quantitative framework for understanding how zinc fluxes regulate cellular processes.
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Affiliation(s)
- Emily L. Que
- The Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
| | - Reiner Bleher
- The Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Northwestern University Atomic and Nanoscale Characterization Experimental Center, Evanston, IL 60208, USA
| | - Francesca E. Duncan
- Department of Obstetrics and Gynecology, Northwestern University, Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Betty Y. Kong
- Department of Obstetrics and Gynecology, Northwestern University, Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Sophie C. Gleber
- X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Stefan Vogt
- X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Si Chen
- X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Seth A. Garwin
- The Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Amanda R. Bayer
- The Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Vinayak Dravid
- Northwestern University Atomic and Nanoscale Characterization Experimental Center, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University; Evanston, IL 60208, USA
| | - Teresa K. Woodruff
- The Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Department of Obstetrics and Gynecology, Northwestern University, Feinberg School of Medicine, Chicago, IL 60611, USA
- Department of Molecular Biosciences, Northwestern University, Evanston, IL 60208, USA
| | - Thomas V. O’Halloran
- The Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Department of Molecular Biosciences, Northwestern University, Evanston, IL 60208, USA
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85
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Liu Z, Yang W, Li Y, Tian F, Zhu W. A facile synthesis of a highly water-soluble and selective fluorescent sensor towards zinc ions derived from β-cyclodextrin based on an unexpected sensing process. RSC Adv 2015. [DOI: 10.1039/c5ra21038k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
A highly selective and sensitive fluorescent sensor for Zn2+ derived from a β-cyclodextrin derivate was fabricated. Through fluorescence micrograph experiments, the sensor showed an excellent image effect on onion epidermal cells.
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Affiliation(s)
- Zengchen Liu
- College of Chemistry and Chemical Eningeering
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- PR China
| | - Weijie Yang
- College of Chemistry and Chemical Eningeering
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- PR China
| | - Yanxia Li
- College of Chemistry and Chemical Eningeering
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- PR China
| | - Fengshou Tian
- College of Chemistry and Chemical Eningeering
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- PR China
| | - Wenping Zhu
- College of Chemistry and Chemical Eningeering
- The Key Laboratory of Rare Earth Functional Materials and Applications
- Zhoukou Normal University
- Zhoukou 466001
- PR China
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86
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Kim YS, Park GJ, Lee JJ, Lee SY, Lee SY, Kim C. Multiple target chemosensor: a fluorescent sensor for Zn(ii) and Al(iii) and a chromogenic sensor for Fe(ii) and Fe(iii). RSC Adv 2015. [DOI: 10.1039/c4ra13291b] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A multifunctional fluorescent and colorimetric chemosensor for Zn2+, Al3+, Fe2+ and Fe3+ was designed and synthesized.
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Affiliation(s)
- Yong Sung Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Gyeong Jin Park
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Jae Jun Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Sun Young Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Seong Youl Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Cheal Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
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87
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Hens A. A reversible turn-off fluorescence probe (HNAPP) for Zn(ii) ion and inorganic phosphate ions (H2P and HP) at physiological pH. RSC Adv 2015. [DOI: 10.1039/c5ra07613g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
NOO coordinating tritadentate zinc sensor (λex= 400 nm,λem= 492 nm,ϕF= 0.45) act as a highly selective sensor for inorganic phosphate (HP/H2P) by ON–OFF signaling at physiological pH.
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Affiliation(s)
- Amar Hens
- Department of Chemistry
- Jadavpur University
- Kolkata 700032
- India
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88
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Ghosh A, Das D. X-ray structurally characterized sensors for ratiometric detection of Zn2+ and Al3+ in human breast cancer cells (MCF7): development of a binary logic gate as a molecular switch. Dalton Trans 2015; 44:11797-804. [DOI: 10.1039/c5dt01303h] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A very simple molecule derived from salicylaldehyde and N-phenyl ethylenediamine (L1) functions as a dual-mode ratiometric fluorescence “turn on” sensor for Zn2+ and Al3+ at two different wavelengths.
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Affiliation(s)
- Abhijit Ghosh
- Department of Chemistry
- The University of Burdwan
- Golapbag
- India
| | - Debasis Das
- Department of Chemistry
- The University of Burdwan
- Golapbag
- India
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89
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Prins A. The nutritional management of a central venous incident. SOUTH AFRICAN JOURNAL OF CLINICAL NUTRITION 2015. [DOI: 10.1080/16070658.2015.11734544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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90
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Wang P, Wu J, Zhou P, Liu W, Tang Y. A novel peptide-based fluorescent chemosensor for measuring zinc ions using different excitation wavelengths and application in live cell imaging. J Mater Chem B 2015; 3:3617-3624. [DOI: 10.1039/c5tb00142k] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel peptide-based fluorescent chemosensor containing both tryptophan and a dansyl fluorophore has been designed to detect Zn2+ in 100% aqueous solution and living cells via two pathways including fluorescence resonance energy transfer and chelation enhanced fluorescence.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jiang Wu
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Panpan Zhou
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Weisheng Liu
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Yu Tang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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91
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Amachawadi RG, Scott HM, Nitikanchana S, Vinasco J, Tokach MD, Dritz SS, Nelssen JL, Goodband RD, Nagaraja TG. Nasal carriage of mecA-positive methicillin-resistant Staphylococcus aureus in pigs exhibits dose-response to zinc supplementation. Foodborne Pathog Dis 2014; 12:159-63. [PMID: 25551258 DOI: 10.1089/fpd.2014.1851] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Zinc (Zn) is often supplemented at elevated concentrations in swine diets, particularly in piglets, to prevent enteric infections and promote growth. Previous studies from Denmark have suggested a genetic linkage and a phenotypic association between Zn resistance, encoded by czrC, and methicillin-resistance conferred by mecA in Staphylococcus aureus. Such an association has not been reported in the U.S. swine population. We conducted an analysis of the effects of Zn, supplemented as zinc oxide (ZnO), on the nasal carriage of methicillin-resistant Staphylococcus aureus (MRSA) in nursery (n=40) and finisher pigs (n=40) enrolled in a nutritional study. Nasal swabs, collected from nursery and finisher pigs, were inoculated onto MRSA CHROMagar and presumptive MRSA colonies were tested for the presence of mecA and czrC genes by polymerase chain reaction. Zinc susceptibility was determined by the agar dilution method. The prevalence of mecA-positive MRSA was 10% (4/40) and 20% (8/40) among nursery and finisher pigs, respectively. Of the 12 mecA-positive S. aureus isolates, 7 had the czrC gene (58.3%) compared to none among the 68 mecA-negative isolates. The presence of both mecA (p=0.002) and czrC (p=0.006) genes were positively associated with higher levels of Zn supplementation. The median minimum inhibitory concentrations of Zn for czrC-positive and czrC-negative isolates were 12 and 2 mM, respectively (p<0.0001). The link between czrC and mecA genes suggests the importance of elevated Zn supplementation in the co-selection and propagation of methicillin resistance among S. aureus in pigs.
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Affiliation(s)
- Raghavendra G Amachawadi
- 1 Department of Diagnostic Medicine and Pathobiology, Kansas State University , Manhattan, Kansas
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92
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Fujikawa M, Kobayashi K, Kozawa T. Redox-dependent DNA distortion in a SoxR protein-promoter complex studied using fluorescent probes. J Biochem 2014; 157:389-97. [PMID: 25520038 DOI: 10.1093/jb/mvu085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 11/12/2014] [Indexed: 11/13/2022] Open
Abstract
The [2Fe-2S] transcriptional factor SoxR, a member of the MerR family, is regulated by the reversible oxidation and reduction of [2Fe-2S] clusters and functions as a sensor of oxidative stress in Escherichia coli. In the oxidized state, distortion of the target DNA promoter region initiates transcription by RNA polymerase, thereby activating transcription. The inactive reduced state of the protein has remained uncharacterized. Here, we directly observed redox-dependent conformational changes in the promoter DNA by site-specifically replacing selected adenine (A) and cytosine (C) bases in the promoter oligonucleotide with the fluorescent probes 2-aminopurine (2Ap) and pyrrolocytosine (pyrrolo-dC), respectively. Reduction of the [2Fe-2S] cluster in the SoxR-DNA complex dramatically weakened the fluorescence intensity of the 2Ap moieties incorporated into the central part of the DNA. In contrast, the fluorescence of 2Ap moieties incorporated at A in other regions and the fluorescence of pyrrolo-dC moieties in the central region of the DNA (C3 and C3') were only slightly decreased by the reduction. These results strongly suggest that the redox change causes a large conformational change within a region confined to the central A-T base pairs in the promoter region of the DNA.
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Affiliation(s)
- Mayu Fujikawa
- The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Kazuo Kobayashi
- The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Takahiro Kozawa
- The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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93
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Sharma H, Singh N, Jang DO. Imidazole and imine coated ZnO nanoparticles for nanomolar detection of Al(III) and Zn(II) in semi-aqueous media. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.080] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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94
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Hens A, Maity A, Rajak KK. N , N coordinating schiff base ligand acting as a fluorescence sensor for zinc(II) and colorimetric sensor for copper(II), and zinc(II) in mixed aqueous media. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.08.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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95
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Recio Despaigne AA, Da Silva JG, da Costa PR, Dos Santos RG, Beraldo H. ROS-mediated cytotoxic effect of copper(II) hydrazone complexes against human glioma cells. Molecules 2014; 19:17202-20. [PMID: 25350363 PMCID: PMC6270821 DOI: 10.3390/molecules191117202] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 10/15/2014] [Accepted: 10/15/2014] [Indexed: 01/04/2023] Open
Abstract
2-Acetylpyridine acetylhydrazone (H2AcMe), 2-benzoylpyridine acetylhydrazone (H2BzMe) and complexes [Cu(H2AcMe)Cl2] (1) and [Cu(H2BzMe)Cl2] (2) were assayed for their cytotoxicity against wild type p53 U87 and mutant p53 T98 glioma cells, and against MRC-5 fibroblast cells. Compounds 1 and 2 proved to be more active than the corresponding hydrazones against U87, but not against T98 cells. Compound 1 induced higher levels of ROS than H2AcMe in both glioma cell lines. H2AcMe and 1 induced lower levels of ROS in MRC5 than in U87 cells. Compound 2 induced lower levels of ROS in MRC5 than in T98 cells. The cytotoxic effect of 1 in U87 cells could be related to its ability to provoke the release of ROS, suggesting that the cytotoxicity of 1 might be somehow p53 dependent.
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Affiliation(s)
- Angel A Recio Despaigne
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Brazil.
| | - Jeferson G Da Silva
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Brazil.
| | - Pryscila R da Costa
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), 31270-901 Belo Horizonte, Brazil.
| | - Raquel G Dos Santos
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), 31270-901 Belo Horizonte, Brazil.
| | - Heloisa Beraldo
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Brazil.
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96
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Jurowski K, Szewczyk B, Nowak G, Piekoszewski W. Biological consequences of zinc deficiency in the pathomechanisms of selected diseases. J Biol Inorg Chem 2014; 19:1069-79. [PMID: 24748223 PMCID: PMC4175048 DOI: 10.1007/s00775-014-1139-0] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 04/09/2014] [Indexed: 01/01/2023]
Abstract
From many points of view, zinc is one of the most important trace elements in biological systems. Many articles describe the well-known role of this metal in human physiology and pathophysiology, but in the related literature, there is a lack of current and reliable reviews of the role of zinc deficiency in many diseases. In this article, we describe the role of zinc deficiency in the oxidative stress control, immune response, proliferation, and pathogenesis and pathophysiology of selected diseases such as depression, cardiovascular diseases, diabetes mellitus, Alzheimer's disease, and Wilson's disease.
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Affiliation(s)
- Kamil Jurowski
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30-060 Kraków, Poland
- Malopolska Centre for Translational Medicine, Faculty of Medicine, Jagiellonian University Collegium Medicum, Kraków, Poland
| | | | - Gabriel Nowak
- Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
- Faculty of Pharmacy, Jagiellonian University Collegium Medicum, Kraków, Poland
| | - Wojciech Piekoszewski
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30-060 Kraków, Poland
- Laboratory of High Resolution Mass Spectrometry, Regional Laboratory of Physicochemical Analysis and Structural Research, Faculty of Chemistry, Jagiellonian University, Kraków, Poland
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97
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Jeon Y, Yoon JD, Cai L, Hwang SU, Kim E, Zheng Z, Lee E, Kim DY, Hyun SH. Supplementation of zinc on oocyte in vitro maturation improves preimplatation embryonic development in pigs. Theriogenology 2014; 82:866-74. [DOI: 10.1016/j.theriogenology.2014.06.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 05/30/2014] [Accepted: 06/28/2014] [Indexed: 01/18/2023]
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98
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Das D, Salgaonkar BB, Mani K, Braganca JM. Cadmium resistance in extremely halophilic archaeon Haloferax strain BBK2. CHEMOSPHERE 2014; 112:385-392. [PMID: 25048931 DOI: 10.1016/j.chemosphere.2014.04.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 03/26/2014] [Accepted: 04/22/2014] [Indexed: 06/03/2023]
Abstract
Halophilic archaea are prevalent in highly saline habitats. Haloferax strain BBK2 is an orange pigmented, exopolysaccharide (EPS) producing extremely halophilic archaeon, isolated from solar salterns of Ribandar, Goa, India. It grew in varying pH (5-10) and NaCl concentration (10-30%). The isolate grew well in complex (NTYE) and minimal media (NGSM) in presence of heavy metal cadmium (Cd) up to 4.0 mM (805.28 mg L(-1)) concentration. The optimum growth in the presence and absence of Cd was seen at a pH range of 7-9 and salinity of 15-25%. The growth kinetics of the isolate in NTYE showed a specific growth rate (μmax) of 0.352 with generation time of 1.968 days. In presence of 1mM Cd, the μmax was 0.325 day(-1) and generation time was 2.132 days. In NGSM, the μmax decreased from 0.517 day(-1) (in control) to 0.265 day(-1) in 1mM Cd while, the doubling time increased from 1.34 days in control to 2.615 days in presence of 1 mM Cd. SDS PAGE of the whole cell protein extracts showed overexpressed proteins of 74.14 and 40 kDa. The scanning electron microscopy, energy dispersive X-ray spectroscopy (SEM-EDX) analysis of the intact cells and cells disrupted by dialysis revealed that Cd was bound onto the cells, which was further confirmed by AAS, FTIR and XRD analysis.
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Affiliation(s)
- Deepthi Das
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, KK Birla Goa Campus, NH 17B Zuarinagar, Goa 403 726, India
| | - Bhakti B Salgaonkar
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, KK Birla Goa Campus, NH 17B Zuarinagar, Goa 403 726, India
| | - Kabilan Mani
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, KK Birla Goa Campus, NH 17B Zuarinagar, Goa 403 726, India
| | - Judith M Braganca
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, KK Birla Goa Campus, NH 17B Zuarinagar, Goa 403 726, India.
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99
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Dimov SM, Georgiev NI, Asiri AM, Bojinov VB. Synthesis and sensor activity of a PET-based 1,8-naphthalimide Probe for Zn(2+) and pH determination. J Fluoresc 2014; 24:1621-8. [PMID: 25199470 DOI: 10.1007/s10895-014-1448-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Accepted: 08/20/2014] [Indexed: 01/13/2023]
Abstract
A novel blue-emitting 1,8-naphthalimide fluorophore designed as a molecular PET-based probe for determination of pH and detection of transition metal ions in the environment was successfully synthesized. Novel compound was configured on the "fluorophore-spacer-receptor" format. Due to the tertiary amine receptor the novel system showed "off-on" switching properties under the transition from alkaline to acid media (FE = 3.2) and in the presence of Zn(2+) ions (FE = 2.5). The results obtained illustrate the high potential of the synthesized blue-emitting 1,8-naphthalimide fluorophore as an efficient pH chemosensing material and a selective probe for Zn(2+) ions.
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Affiliation(s)
- Stefan M Dimov
- Department of Organic Synthesis, University of Chemical Technology and Metallurgy, 8 Kliment Ohridsky Bulv, 1756, Sofia, Bulgaria
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100
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Chen LN, Kuo CC, Chiu YC, Chen WC. Ultra metal ions and pH sensing characteristics of thermoresponsive luminescent electrospun nanofibers prepared from poly(HPBO-co-NIPAAm-co-SA). RSC Adv 2014. [DOI: 10.1039/c4ra07422j] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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