1
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Ye X, Li J, Gao D, Ma P, Wu Q, Song D. A Dual-Mode Fluorescent Nanoprobe for the Detection and Visual Screening of Pathogenic Bacterial Spores. Anal Chem 2024; 96:6012-6020. [PMID: 38564412 DOI: 10.1021/acs.analchem.4c00443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Bacterial vegetative cells turn into metabolically dormant spores in certain environmental situations. Once suitable conditions trigger the germination of spores belonging to the pathogenic bacterial category, public safety and environmental hygiene will be threatened, and lives will even be endangered when encountering fatal ones. Instant identification of pathogenic bacterial spores remains a challenging task, since most current approaches belonging to complicated biological methods unsuitable for onsite sensing or emerging alternative chemical techniques are still inseparable from professional instruments. Here we developed a polychromatic fluorescent nanoprobe for ratiometric detection and visual inspection of the pathogenic bacterial spore biomarker, dipicolinic acid (DPA), realizing rapidly accurate screening of pathogenic bacterial spores such as Bacillus anthracis spores. The nanoprobe is made of aminoclay-coated silicon nanoparticles and functionalized with europium ions, exhibiting selective and sensitive response toward DPA and Bacillus subtilis spores (simulants for Bacillus anthracis spores) with excellent linearity. The proposed sensing strategy allowing spore determination of as few as 0.3 × 105 CFU/mL within 10 s was further applied to real environmental sample detection with good accuracy and reliability. Visual quantitative determination can be achieved by analyzing the RGB values of the corresponding test solution color via a color recognition APP on a smartphone. Different test samples can be photographed at the same time, hence the efficient accomplishment of examining bulk samples within minutes. Potentially employed in various on-site sensing occasions, this strategy may develop into a powerful means for distinguishing hazardous pathogens to facilitate timely and proper actions of dealing with multifarious security issues.
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Affiliation(s)
- Xiwen Ye
- Jilin Province Research Center for Engineering and Technology of Spectral Analytical Instruments, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
| | - Jingkang Li
- Jilin Province Research Center for Engineering and Technology of Spectral Analytical Instruments, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
| | - Dejiang Gao
- Jilin Province Research Center for Engineering and Technology of Spectral Analytical Instruments, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
| | - Pinyi Ma
- Jilin Province Research Center for Engineering and Technology of Spectral Analytical Instruments, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
| | - Qiong Wu
- Key Laboratory of Pathobiology, Ministry of Education, Nanomedicine and Translational Research Center, China-Japan Union Hospital of Jilin University, Changchun 130030, China
| | - Daqian Song
- Jilin Province Research Center for Engineering and Technology of Spectral Analytical Instruments, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, China
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2
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A Smartphone Integrated Platform for Ratiometric Fluorescent Sensitive and Selective Determination of Dipicolinic Acid. BIOSENSORS 2022; 12:bios12080668. [PMID: 36005063 PMCID: PMC9405621 DOI: 10.3390/bios12080668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/02/2022] [Accepted: 08/17/2022] [Indexed: 11/25/2022]
Abstract
A desirable lanthanide-based ratiometric fluorescence probe was designed as a multifunctional nanoplatform for the determination of dipicolinic acid (DPA), a unique bacterial endospore biomarker, with high selectivity and sensitivity. The carbon dots (CDs) with blue emission wavelengths at 470 nm are developed with europium ion (Eu3+) to form Eu3+/CDs fluorescent probes. DPA can specifically combine with Eu3+ and then transfer energy from DPA to Eu3+ sequentially through the antenna effect, resulting in a distinct increase in the red fluorescence emission peak at 615 nm. The fluorescence intensity ratio of Eu3+/CDs (fluorescence intensity at 615 nm/fluorescence intensity at 470 nm) showed good linearity and low detection limit. The developed ratiometric nanoplatform possesses great potential for application in complex matrices owing to its specificity for DPA. In addition, the integration of a smartphone with the Color Picker APP installed enabled point-of-care testing (POCT) with quantitative measurement capabilities, confirming the great potential of the as-prepared measurement platform for on-site testing.
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3
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Qiu MM, Chen KF, Liu QR, Miao WN, Liu B, Xu L. A ratiometric fluorescent sensor made of a terbium coordination polymer for the anthrax biomarker 2,6-dipicolinic acid with on-site detection assisted by a smartphone app. CrystEngComm 2022. [DOI: 10.1039/d1ce01256h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Tb-NDBC is a quantitative ratiometric fluorescence sensor for DPA detection with high sensitivity and selectivity, a rapid response, and durability.
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Affiliation(s)
- Miao-Miao Qiu
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi Province, P. R. China
| | - Ke-Fu Chen
- College of Information Engineering, Henan University of Science and Technology, Luoyang 471000, Henan Province, P. R. China
| | - Qi-Rui Liu
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi Province, P. R. China
| | - Wei-Ni Miao
- Key Laboratory of Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, Shaanxi Province, P. R. China
| | - Bing Liu
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, Shaanxi Province, P. R. China
| | - Ling Xu
- Key Laboratory of Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, Shaanxi Province, P. R. China
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4
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Alp M, Pamuk Algi M, Algi F. Eu(III)-DO3A and BODIPY dyad as a chemosensor for anthrax biomarker. LUMINESCENCE 2021; 36:1953-1960. [PMID: 34337847 DOI: 10.1002/bio.4129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/21/2021] [Accepted: 07/29/2021] [Indexed: 12/14/2022]
Abstract
The sensitive and selective determination of Bacillus anthracis spores before the infection is vital for human health and safety. Dipicolinic acid (DPA) is an excellent biomarker due to its presence in the nucleus of bacterial spores at high concentrations (up to 1 M, about 15% dry weight). In the present work, a new molecular chemosensor 1, based on europium(III)-DO3A and BODIPY dyad, is developed to detect DPA in phosphate-buffered saline (PBS) buffered solution and tap water samples. Also, 1 can be used as a ratiometric optical chemosensor to track DPA.
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Affiliation(s)
- Meltem Alp
- Department of Biotechnology & ASUBTAM Memduh Bilmez BioNanoTech Laboratory, Aksaray University, Aksaray, Turkey
| | - Melek Pamuk Algi
- Department of Chemistry & ASUBTAM Memduh Bilmez BioNanoTech Laboratory, Aksaray University, Aksaray, Turkey
| | - Fatih Algi
- Department of Biotechnology & ASUBTAM Memduh Bilmez BioNanoTech Laboratory, Aksaray University, Aksaray, Turkey
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5
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Lister AP, Sellors WJ, Howle CR, Mahajan S. Raman Scattering Techniques for Defense and Security Applications. Anal Chem 2021; 93:417-429. [PMID: 33350812 DOI: 10.1021/acs.analchem.0c04606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Adam P Lister
- School of Chemistry and Institute for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | | | | | - Sumeet Mahajan
- School of Chemistry and Institute for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
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6
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Wang B, Xia J, Zhou G, Li X, Dai M, Jiang D, Li Q. Tb(iii)-doped nanosheets as a fluorescent probe for the detection of dipicolinic acid. RSC Adv 2020; 10:37500-37506. [PMID: 35521243 PMCID: PMC9057155 DOI: 10.1039/c9ra09695g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 10/01/2020] [Indexed: 01/04/2023] Open
Abstract
A new fluorescent probe based on terbium(iii)-doped nanosheets was designed for detecting low-levels of dipicolinic acid (DPA), a biomarker of bacterial spores. The ability to detect ultra-low concentrations of DPA is therefore of great significance. First, Tb(iii)-doped ytterbium hydroxide nanosheets were obtained by mechanical exfoliation from layered rare-earth hydroxide (LRH) materials. The morphology of the as-synthesized nanosheets was studied by transmission electron microscopy and atomic force microscopy. The Tb(iii)-doped nanosheets are demonstrated to be highly sensitive to DPA, which remarkably enhances Tb(iii) luminescence intensities at a wavelength of 544 nm. Furthermore, Tb(iii) emission increases linearly with DPA concentration. Selectivity studies were conducted by adding different competing aromatic ligands to the sensing solution; however, their fluorescence responses were observed to be negligibly small in comparison with that of DPA. Our findings provide a basis for the application of Tb(iii)-doped nanosheets for accurate, sensitive, and selective monitoring of DPA as a biomarker of anthrax.
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Affiliation(s)
- Bing Wang
- School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 P. R. China
| | - Jinfeng Xia
- Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 P. R. China
| | - Guohong Zhou
- Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 P. R. China
| | - Xin Li
- School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 P. R. China
| | - Mengting Dai
- School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 P. R. China
| | - Danyu Jiang
- Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 P. R. China
| | - Qiang Li
- School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 P. R. China
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7
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Ultrasonic synthesis, crystal structure, luminescent, and magnetic properties of a new metal–organic complex based on Ce(IV)–Sr(II). RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03834-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Soni A, Oey I, Silcock P, Permina E, Bremer PJ. Effect of cold storage and different ions on the thermal resistance of B. cereus NZAS01 spores- analysis of differential gene expression and ion exchange. Food Res Int 2019; 116:578-585. [PMID: 30716983 DOI: 10.1016/j.foodres.2018.08.076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/16/2018] [Accepted: 08/25/2018] [Indexed: 10/28/2022]
Abstract
Bacillus cereus spores in food are able to survive pasteurization, and if conditions are favourable, subsequently germinate, grow and produce toxins causing food poisoning. The objectives of this study were to firstly determine the impact of cold storage and ion uptake on the thermal resistance of B. cereus spores and secondly to use differential gene expression to help elucidate possible molecular mechanisms for the changes detected in their thermal resistance. B. cereus spores were held at 4 °C in either 0.05 or 0.5 M solutions of cations (Na+, Ca2+ Mg2+,K+, Zn2+) for 6 days and their D88-values were estimated. In the presence of sodium chloride (0.05 and 0.5 M), sodium phosphate buffer, (pH 7, 0.05 and 0.5 M) or zinc acetate (0.05 M), D88 values decreased by 8.8, 10.9, 11.2, 12.9, and 10.2 min respectively, with no evidence of germination (plating methods). Exposure of spores to Na+ in sodium phosphate buffer (pH 7, 0.05 and 0.5 M) or sodium chloride (0.05 and 0.5 M) resulted in the accumulation of Na+ (66.0 ± 2.9, 193.1 ± 4.6, 136.2 ± 9.9 and 70.5 ± 2.7 μg/g) by spores at the significant expense of K+ (10.8 ± 0.5, 7.5 ± 0.2, 8.1 ± 0.4 and 3.6 ± 0.4 μg/g respectively). The mechanism behind the loss of resistance in sodium phosphate buffer (0.05 M) was further investigated by monitoring the differential gene expression using mRNA sequencing. Genes encoding for uracil permease (BC_3890), Mg2+ P-type ATPase-like protein (BC_1581), ABC transporter ATP-binding protein (BC_0815), and 2-keto-3-deoxygluconate permease (BC_4841) were significantly (FDR value ≤0.05) upregulated. This upregulation indicated a possible increase in permeability, which is suggested to account for the increased uptake of sodium ions and the reduction measured in the spore's thermal resistance. This data suggests that during storage at 4 °C in the presence of sodium ions, spores should not be considered to be completely dormant.
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Affiliation(s)
- Aswathi Soni
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Indrawati Oey
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Riddet Institute, Palmerston North, New Zealand
| | - Patrick Silcock
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Elizabeth Permina
- Otago Genomics & Bioinformatics Facility, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Phil J Bremer
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand; New Zealand Food Safety Science Research Centre, New Zealand.
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9
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Lei H, Qi CX, Chen XB, Zhang T, Xu L, Liu B. Ratiometric fluorescence determination of the anthrax biomarker 2,6-dipicolinic acid using a Eu3+/Tb3+-doped nickel coordination polymer. NEW J CHEM 2019. [DOI: 10.1039/c9nj04501e] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Tb3+0.6/Eu3+0.4@Ni-BTC is a quantitative ratiometric fluorescence sensor for DPA detection with high sensitivity, anti-interference, rapid response and durability.
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Affiliation(s)
- Hang Lei
- College of Chemistry and Chemical Engineering
- Shaanxi Key Laboratory of Chemical Additives for Industry
- Shaanxi University of Science and Technology
- Xi’an 710021
- P. R. China
| | - Cui-Xing Qi
- College of Chemistry and Chemical Engineering
- Shaanxi Key Laboratory of Chemical Additives for Industry
- Shaanxi University of Science and Technology
- Xi’an 710021
- P. R. China
| | - Xuan-Bo Chen
- College of Chemistry and Chemical Engineering
- Shaanxi Key Laboratory of Chemical Additives for Industry
- Shaanxi University of Science and Technology
- Xi’an 710021
- P. R. China
| | - Tian Zhang
- College of Chemistry and Chemical Engineering
- Shaanxi Key Laboratory of Chemical Additives for Industry
- Shaanxi University of Science and Technology
- Xi’an 710021
- P. R. China
| | - Ling Xu
- School of Chemistry & Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
- P. R. China
| | - Bing Liu
- College of Chemistry and Chemical Engineering
- Shaanxi Key Laboratory of Chemical Additives for Industry
- Shaanxi University of Science and Technology
- Xi’an 710021
- P. R. China
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10
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Soni A, Oey I, Silcock P, Permina E, Bremer PJ. Differential gene expression for investigation of the effect of germinants and heat activation to induce germination in Bacillus cereus spores. Food Res Int 2018; 119:462-468. [PMID: 30884678 DOI: 10.1016/j.foodres.2018.12.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 12/10/2018] [Accepted: 12/22/2018] [Indexed: 11/15/2022]
Abstract
Differential gene expression was used to explore the mechanisms underpinning the differences in the impact of heat activation (70 °C for 30 min) on the germination of Bacillus cereus spores in the presence and absence of a germinant (L-alanine). The number of germinated cells, after heat activation plus L-alanine (3.5 ± 0.02 log CFU/ml) in the spore only initial population was found to be higher than that in only heat activated spores (2.01 ± 0.02 log CFU/ml). The concentration of DPA released by heat activated spores in the presence of L-alanine was 68.3 ± 0.1 and 112.1 ± 0.02 μg/ml after 30 and 60 min, compared to 96.5 and 166.2 ± 0.01 μg/ml after 30 and 90 min, respectively released by spores subjected only to heat activation. Gene (BC0784) encoding for the spore germination protein, gerA operon was up-regulated with a log2-transformed fold change value of 1.2 due to heat activation in the presence of L-alanine. The GerA operon located in the inner membrane is known to be involved in the uptake of L-alanine by B. cereus and has been reported to be involved in L-alanine mediated germination. In addition the up-regulation of genes involved in the uptake of L-alanine is proposed to provide the answer to the synergistic effect of heat and L-alanine in inducing germination in B. cereus spores. In short, heat activation increases the ability of L-alanine to penetrate into the spore's inner membrane, where it can be recognized by the receptors for initiation of the germination pathway. In the current study, the majority of the ribosomal proteins were down-regulated (when spores were heat treated in presence of germinants) this process also appeared to slow down protein synthesis by restricting the protein translation machinery. Differential gene expression revealed the genes responsible for the pathways related to transport and recognition of L-alanine into the spore that could have led to the accelerated germination process along with partial shutting down of protein synthesis pathway and ABC transporters. Knowledge of gene regulation in spores during heat activation will help in the development of approaches to prevent spore germination, which could provide an additional safeguard against bacterial growth and toxin production in improperly cooled heat treated foods.
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Affiliation(s)
- Aswathi Soni
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Indrawati Oey
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand; Riddet Institute, Palmerston North, New Zealand
| | - Patrick Silcock
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Elizabeth Permina
- Otago Genomics & Bioinformatics Facility, University of Otago, New Zealand
| | - Phil J Bremer
- Department of Food Science, University of Otago, PO Box 56, Dunedin 9054, New Zealand; New Zealand Food Safety Science Research Centre, New Zealand.
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11
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Yao Y, Ji J, Zhang H, Zhang K, Liu B, Yang P. Three-Dimensional Plasmonic Trap Array for Ultrasensitive Surface-Enhanced Raman Scattering Analysis of Single Cells. Anal Chem 2018; 90:10394-10399. [PMID: 30075082 DOI: 10.1021/acs.analchem.8b02252] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Yuanyuan Yao
- Department of Chemistry, Shanghai Stomatological Hospital, Institute of Biomedical Sciences, and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, People’s Republic of China
| | - Ji Ji
- Department of Chemistry, Shanghai Stomatological Hospital, Institute of Biomedical Sciences, and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, People’s Republic of China
| | - Hongding Zhang
- Department of Chemistry, Shanghai Stomatological Hospital, Institute of Biomedical Sciences, and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, People’s Republic of China
| | - Kun Zhang
- Department of Chemistry, Shanghai Stomatological Hospital, Institute of Biomedical Sciences, and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, People’s Republic of China
| | - Baohong Liu
- Department of Chemistry, Shanghai Stomatological Hospital, Institute of Biomedical Sciences, and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, People’s Republic of China
| | - Pengyuan Yang
- Department of Chemistry, Shanghai Stomatological Hospital, Institute of Biomedical Sciences, and State Key Lab of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, People’s Republic of China
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12
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Xu Zhou K, Ionescu A, Wan E, Ho YN, Barnes CH, Christie G, Wilson DI. Paramagnetism in Bacillus spores: Opportunities for novel biotechnological applications. Biotechnol Bioeng 2018; 115:955-964. [PMID: 29205279 PMCID: PMC5888203 DOI: 10.1002/bit.26501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 10/19/2017] [Accepted: 11/20/2017] [Indexed: 12/25/2022]
Abstract
Spores of Bacillus megaterium, Bacillus cereus, and Bacillus subtilis were found to exhibit intrinsic paramagnetic properties as a result of the accumulation of manganese ions. All three Bacillus species displayed strong yet distinctive magnetic properties arising from differences in manganese quantity and valency. Manganese ions were found to accumulate both within the spore core as well as being associated with the surface of the spore. Bacillus megaterium spores accumulated up to 1 wt.% manganese (II) within, with a further 0.6 wt.% adsorbed onto the surface. At room temperature, Bacillus spores possess average magnetic susceptibilities in the range of 10-6 to 10-5 . Three spore-related biotechnological applications-magnetic sensing, magnetic separation and metal ion adsorption-were assessed subsequently, with the latter two considered as having the most potential for development.
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Affiliation(s)
- Ke Xu Zhou
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeUnited Kingdom
| | - Adrian Ionescu
- Department of PhysicsUniversity of CambridgeCambridgeUnited Kingdom
| | - Eamon Wan
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeUnited Kingdom
| | - Yeuk N. Ho
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeUnited Kingdom
| | | | - Graham Christie
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeUnited Kingdom
| | - D. Ian Wilson
- Department of Chemical Engineering and BiotechnologyUniversity of CambridgeCambridgeUnited Kingdom
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13
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Soni A, Oey I, Silcock P, Bremer PJ. Impact of temperature, nutrients, pH and cold storage on the germination, growth and resistance of Bacillus cereus spores in egg white. Food Res Int 2018; 106:394-403. [DOI: 10.1016/j.foodres.2018.01.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 12/10/2017] [Accepted: 01/06/2018] [Indexed: 12/11/2022]
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14
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WEI C, YAO X, SUN B, CAI Z, ZHAO Z, CHEN M, WEI H, LIU Z, BIAN Z, HUANG C. Evaporable luminescent lanthanide complexes based on novel tridentate ligand. J RARE EARTH 2017. [DOI: 10.1016/s1002-0721(16)60166-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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15
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Bhardwaj N, Bhardwaj S, Mehta J, Kim KH, Deep A. Highly sensitive detection of dipicolinic acid with a water-dispersible terbium-metal organic framework. Biosens Bioelectron 2016; 86:799-804. [DOI: 10.1016/j.bios.2016.07.063] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 07/13/2016] [Accepted: 07/19/2016] [Indexed: 12/31/2022]
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16
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Mundt R, Torres Ziegenbein C, Fröbel S, Weingart O, Gilch P. Femtosecond Spectroscopy of Calcium Dipicolinate—A Major Component of Bacterial Spores. J Phys Chem B 2016; 120:9376-86. [DOI: 10.1021/acs.jpcb.6b06230] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ramona Mundt
- Institut
für Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätstr.
1, D-40225 Düsseldorf, Germany
| | - Christian Torres Ziegenbein
- Institut
für Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätstr.
1, D-40225 Düsseldorf, Germany
| | - Sascha Fröbel
- Institut
für Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätstr.
1, D-40225 Düsseldorf, Germany
| | - Oliver Weingart
- Institut
für Theoretische Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätstr. 1, D-40225 Düsseldorf, Germany
| | - Peter Gilch
- Institut
für Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätstr.
1, D-40225 Düsseldorf, Germany
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17
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An experimental and theoretical study of a hydrogen-bonded complex: O-phenylenediamine with 2,6-pyridinedicarboxylic acid. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.07.077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Friedline AW, Zachariah MM, Johnson K, Thomas KJ, Middaugh AN, Garimella R, Powell DR, Vaishampayan PA, Rice CV. Water behavior in bacterial spores by deuterium NMR spectroscopy. J Phys Chem B 2014; 118:8945-55. [PMID: 24950158 PMCID: PMC4216197 DOI: 10.1021/jp5025119] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Dormant bacterial spores are able
to survive long periods of time
without nutrients, withstand harsh environmental conditions, and germinate
into metabolically active bacteria when conditions are favorable.
Numerous factors influence this hardiness, including the spore structure
and the presence of compounds to protect DNA from damage. It is known
that the water content of the spore core plays a role in resistance
to degradation, but the exact state of water inside the core is a
subject of discussion. Two main theories present themselves: either
the water in the spore core is mostly immobile and the core and its
components are in a glassy state, or the core is a gel with mobile
water around components which themselves have limited mobility. Using
deuterium solid-state NMR experiments, we examine the nature of the
water in the spore core. Our data show the presence of unbound water,
bound water, and deuterated biomolecules that also contain labile
deuterons. Deuterium–hydrogen exchange experiments show that
most of these deuterons are inaccessible by external water. We believe
that these unreachable deuterons are in a chemical bonding state that
prevents exchange. Variable-temperature NMR results suggest that the
spore core is more rigid than would be expected for a gel-like state.
However, our rigid core interpretation may only apply to dried spores
whereas a gel core may exist in aqueous suspension. Nonetheless, the
gel core, if present, is inaccessible to external water.
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Affiliation(s)
- Anthony W Friedline
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma , 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
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Li Q, Sun K, Chang K, Yu J, Chiu DT, Wu C, Qin W. Ratiometric luminescent detection of bacterial spores with terbium chelated semiconducting polymer dots. Anal Chem 2013; 85:9087-91. [PMID: 23964730 DOI: 10.1021/ac4016616] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We report a ratiometric fluorescent sensor based on semiconducting polymer dots chelated with terbium ions to detect bacterial spores in aqueous solution. Fluorescent polyfluorene (PFO) dots serve as a scaffold to coordinate with lanthanide ions that can be sensitized by calcium dipicolinate (CaDPA), an important biomarker of bacterial spores. The absorption band of PFO dots extends to deep UV region, allowing both the reference and the sensitizer can be excited with a single wavelength (~275 nm). The fluorescence of PFO remains constant as a reference, while the Tb(3+) ions exhibit enhanced luminescence upon binding with DPA. The sharp fluorescence peaks of β-phase PFO dots and the narrow-band emissions of Tb(3+) ions enable ratiometric and sensitive CaDPA detection with a linear response over nanomolar concentration and a detection limit of ~0.2 nM. The Pdots based sensor also show excellent selectivity to CaDPA over other aromatic ligands. Our results indicate that the Tb(3+) chelated Pdots sensor is promising for sensitive and rapid detection of bacterial spores.
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Affiliation(s)
- Qiong Li
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University , Changchun, Jilin 130012, China
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İlkimen H, Yenikaya C, Sarı M, Bülbül M, Tunca E, Dal H. Synthesis and characterization of a proton transfer salt between 2,6-pyridinedicarboxylic acid and 2-aminobenzothiazole, and its complexes and their inhibition studies on carbonic anhydrase isoenzymes. J Enzyme Inhib Med Chem 2013; 29:353-61. [DOI: 10.3109/14756366.2013.782299] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Halil İlkimen
- Department of Chemistry, Faculty of Arts and Sciences, Dumlupınar University
KütahyaTurkey
| | - Cengiz Yenikaya
- Department of Chemistry, Faculty of Arts and Sciences, Dumlupınar University
KütahyaTurkey
| | - Musa Sarı
- Department of Physics Education, Gazi University
AnkaraTurkey
| | - Metin Bülbül
- Department of Chemistry, Faculty of Arts and Sciences, Dumlupınar University
KütahyaTurkey
| | - Ekrem Tunca
- Department of Chemistry, Faculty of Arts and Sciences, Dumlupınar University
KütahyaTurkey
| | - Hakan Dal
- Department of Chemistry, Faculty of Science, Anadolu University
EskişehirTurkey
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Eker B, Yilmaz MD, Schlautmann S, Gardeniers JGE, Huskens J. A supramolecular sensing platform for phosphate anions and an anthrax biomarker in a microfluidic device. Int J Mol Sci 2011; 12:7335-51. [PMID: 22174602 PMCID: PMC3233408 DOI: 10.3390/ijms12117335] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 10/19/2011] [Accepted: 10/20/2011] [Indexed: 12/04/2022] Open
Abstract
A supramolecular platform based on self-assembled monolayers (SAMs) has been implemented in a microfluidic device. The system has been applied for the sensing of two different analyte types: biologically relevant phosphate anions and aromatic carboxylic acids, which are important for anthrax detection. A Eu(III)-EDTA complex was bound to β-cyclodextrin monolayers via orthogonal supramolecular host-guest interactions. The self-assembly of the Eu(III)-EDTA conjugate and naphthalene β-diketone as an antenna resulted in the formation of a highly luminescent lanthanide complex on the microchannel surface. Detection of different phosphate anions and aromatic carboxylic acids was demonstrated by monitoring the decrease in red emission following displacement of the antenna by the analyte. Among these analytes, adenosine triphosphate (ATP) and pyrophosphate, as well as dipicolinic acid (DPA) which is a biomarker for anthrax, showed a strong response. Parallel fabrication of five sensing SAMs in a single multichannel chip was performed, as a first demonstration of phosphate and carboxylic acid screening in a multiplexed format that allows a general detection platform for both analyte systems in a single test run with μM and nM detection sensitivity for ATP and DPA, respectively.
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Affiliation(s)
- Bilge Eker
- Mesoscale Chemical Systems, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE, Enschede, The Netherlands; E-Mails: (B.E.); (S.S.)
| | - Mahmut Deniz Yilmaz
- Molecular Nanofabrication Group, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE, Enschede, The Netherlands; E-Mail: (M.D.Y.)
| | - Stefan Schlautmann
- Mesoscale Chemical Systems, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE, Enschede, The Netherlands; E-Mails: (B.E.); (S.S.)
| | - Johannes G. E. Gardeniers
- Mesoscale Chemical Systems, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE, Enschede, The Netherlands; E-Mails: (B.E.); (S.S.)
| | - Jurriaan Huskens
- Molecular Nanofabrication Group, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE, Enschede, The Netherlands; E-Mail: (M.D.Y.)
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22
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Yenikaya C, Büyükkidan N, Sari M, Keşli R, Ilkimen H, Bülbül M, Büyükgüngör O. Synthesis, characterization, and biological evaluation of Cu(II) complexes with the proton transfer salt of 2,6-pyridinedicarboxylic acid and 2-amino-4-methylpyridine. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.620608] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Cengiz Yenikaya
- a Department of Chemistry, Faculty of Arts and Science , Dumlupınar University , 43100 Kütahya, Turkey
| | - Nurgün Büyükkidan
- a Department of Chemistry, Faculty of Arts and Science , Dumlupınar University , 43100 Kütahya, Turkey
| | - Musa Sari
- b Department of Physics Education , Gazi University , 06500 Ankara, Turkey
| | - Recep Keşli
- c Department of Microbiology , Konya Education and Research Hospital , 42100 Meram, Konya, Turkey
| | - Halil Ilkimen
- a Department of Chemistry, Faculty of Arts and Science , Dumlupınar University , 43100 Kütahya, Turkey
| | - Metin Bülbül
- a Department of Chemistry, Faculty of Arts and Science , Dumlupınar University , 43100 Kütahya, Turkey
| | - Orhan Büyükgüngör
- d Department of Physics, Faculty of Arts and Science , Ondokuz Mayis University , 55139 Kurupelit, Samsun, Turkey
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23
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Cheng HW, Chen YY, Lin XX, Huan SY, Wu HL, Shen GL, Yu RQ. Surface-enhanced Raman spectroscopic detection of Bacillus subtilis spores using gold nanoparticle based substrates. Anal Chim Acta 2011; 707:155-63. [PMID: 22027133 DOI: 10.1016/j.aca.2011.09.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2011] [Revised: 09/03/2011] [Accepted: 09/08/2011] [Indexed: 11/24/2022]
Abstract
The detection of bacterial spores requires the capability of highly sensitive and biocompatible probes. This report describes the findings of an investigation of surface-enhanced Raman spectroscopic (SERS) detection of Bacillus subtilis spores using gold-nanoparticle (Au NP) based substrates as the spectroscopic probe. The SERS substrates are shown to be highly sensitive for the detection of B. subtilis spores, which release calcium dipicolinate (CaDPA) as a biomarker. The SERS bands of CaDPA released from the spores by extraction using nitric acid provide the diagnostic signal for the detection, exhibiting a limit of detection (LOD) of 1.5×10(9) spores L(-1) (or 2.5×10(-14) M). The LOD for the Au NP based substrates is quite comparable with that reported for Ag nanoparticle based substrates for the detection of spores, though the surface adsorption equilibrium constant is found to be smaller by a factor of 1-2 orders of magnitude than the Ag nanoparticle based substrates. The results have also revealed the viability of SERS detection of CaDPA released from the spores under ambient conditions without extraction using any reagents, showing a significant reduction of the diagnostic peak width for the detection. These findings have demonstrated the viability of Au NP based SERS substrates for direct use with high resolution and sensitivity as a biocompatible probe for the detection of bacterial spores.
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Affiliation(s)
- Han-Wen Cheng
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
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24
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Zhang X, Duyne RPV. Optimized Silver Film over Nanosphere Surfaces for the Biowarfare Agent Detection Based on Surface-Enhanced Raman Spectroscopy. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-876-r8.54] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractThis work presents the rapid detection of Bacillus subtilis spores, harmless simulants for Bacillus anthracis, using surface-enhanced Raman spectroscopy (SERS) on silver film over nanosphere (AgFON) substrates. Calcium dipicolinate (CaDPA), a biomarker for bacillus spores, can be extracted effectively from spores with nitric acid and successfully detected by SERS. The highly tunable nature of AgFON optical properties was exploited to establish general optimization conditions. AgFON surfaces optimized for 750-nm laser excitation have been characterized by UV-vis diffuse reflectance spectroscopy. The SERS signal from extracted CaDPA was evaluated over the spore concentration range 10-15-10-12M to determine the adsorption capacity of the AgFON surface and the limit of detection (LOD). These sensing capabilities have been successfully transitioned to an inexpensive, portable Raman spectrometer. Using the extraction method and this field-portable instrument, the anthrax infectious dose of 104spores were detected with only a 5-second collection period on a one-month-old prefabricated AgFON substrate.
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25
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Nackos AN, Truong TV, Pulsipher TC, Kimball JA, Tolley HD, Robison RA, Bartholomew CH, Lee ML. One-step conversion of to its using salts for GC-MSdetection of bacterial endospores. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2011; 3:245-258. [PMID: 32938021 DOI: 10.1039/c0ay00270d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Methyl sulfate (MeSO4-) salts were explored as thermochemolysis-methylation (TCM) reagents for gas chromatographic (GC) analysis of dipicolinic acid (DPA) as its dimethyl ester (Me2DPA) from bacterial endospores. The reaction was carried out under non-pyrolytic conditions by inserting a small coiled wire filament coated with the sample and reagents directly inside a GC injection port at 290 °C. Above 10 : 1 methyl donor/DPA ratios, alkali metal salts of MeSO4- effected 80-90% conversion of DPA to Me2DPA, which was 10-20 times more active than the same amount of tetramethylammonium hydroxide (TMA-OH) at this temperature. A quaternary salt mixture consisting of 1 : 3 : 1 : 3 TMA+/Na+/OH-/MeSO4- methylated spore DPA with an average conversion of 86% (mean conversion by TMA-OH under the same conditions was 4%). Therefore, the sensitivity for detection of bacterial endospores was increased over 20-fold compared to that observed with the more commonly employed TMA-OH methylating reagent. The limit of detection by this method was 9 × 104 total spores. Mechanisms describing the observed behavior are proposed and discussed. This is the first use of MeSO4- as a TCM reagent for GC.
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Affiliation(s)
- Aaron N Nackos
- Department of Chemical Engineering, Brigham Young University, Provo, UT 84602, USA.
| | - Tai V Truong
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA.
| | | | - Jon A Kimball
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA.
| | - H Dennis Tolley
- Department of Statistics, Brigham Young University, Provo, UT 84602, USA
| | - Richard A Robison
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT 84602, USA
| | - Calvin H Bartholomew
- Department of Chemical Engineering, Brigham Young University, Provo, UT 84602, USA.
| | - Milton L Lee
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA.
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26
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Ma B, Zeng F, Zheng F, Wu S. Fluorescent detection of an anthrax biomarker based on PVA film. Analyst 2011; 136:3649-55. [DOI: 10.1039/c1an15384f] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Derikvand Z, Talei GR, Aghabozorg H, Olmstead MM, Azadbakht A, Nemati A, Gharamaleki JA. Synthesis, Crystal Structure, Spectroscopic, Electrochemical and Antimicrobial Properties of Cu(II) Complex with the Mixed Ligands of 2,9-Dimethyl-1,10-phenanthroline and 4-Hydroxypyridine-2,6-dicarboxylic Acid. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090358] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Yilmaz M, Hsu SH, Reinhoudt D, Velders A, Huskens J. Ratiometric Fluorescent Detection of an Anthrax Biomarker at Molecular Printboards. Angew Chem Int Ed Engl 2010; 49:5938-41. [DOI: 10.1002/anie.201000540] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Yilmaz M, Hsu SH, Reinhoudt D, Velders A, Huskens J. Ratiometric Fluorescent Detection of an Anthrax Biomarker at Molecular Printboards. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000540] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Synthesis, characterization and biological evaluation of a novel Cu(II) complex with the mixed ligands 2,6-pyridinedicarboxylic acid and 2-aminopyridine. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.05.079] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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Zhang X, Zhao J, Whitney AV, Elam JW, Van Duyne RP. Ultrastable Substrates for Surface-Enhanced Raman Spectroscopy: Al2O3Overlayers Fabricated by Atomic Layer Deposition Yield Improved Anthrax Biomarker Detection. J Am Chem Soc 2006; 128:10304-9. [PMID: 16881662 DOI: 10.1021/ja0638760] [Citation(s) in RCA: 228] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new method to stabilize and functionalize surfaces for surface-enhanced Raman spectroscopy (SERS) is demonstrated. Atomic layer deposition (ALD) is used to deposit a sub-1-nm alumina layer on silver film-over-nanosphere (AgFON) substrates. The resulting overlayer maintains and stabilizes the SERS activity of the underlying silver while presenting the surface chemistry of the alumina overlayer, a commonly used polar adsorbent in chromatographic separations. The relative affinity of analytes for alumina-modified AgFON substrates can be determined by their polarity. On the basis of SERS measurements, dipicolinic acid displays the strongest binding to the ALD alumina-modified AgFON among a set of pyridine derivatives with varying polarity. This strong affinity for carboxylate groups makes the SERS substrate an ideal candidate for bacillus spores detection using the dipicolinate biomarker. The SERS signal from extracted dipicolinate was measured over the spore concentration range 10(-14)-10(-12) M to determine the saturation binding capacity of the alumina-modified AgFON surface. The adsorption constant was determined to be Kspore = 9.0 x 10(13) M(-1). A 10-s data collection time is capable of achieving a limit of detection of approximately 1.4 x 10(3) spores. The shelf life of prefabricated substrates is at least 9 months prior to use. In comparison to the bare AgFON substrates, the ALD-modified AgFON substrates demonstrate twice the sensitivity with 6 times shorter data acquisition time and 7 times longer temporal stability. ALD expands the palette of available chemical methods to functionalize SERS substrates, which will enable improved and diverse chemical control over the nature of analyte-surface binding for biomedical, homeland security, and environmental applications.
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Affiliation(s)
- Xiaoyu Zhang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
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32
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Sukanya D, Prabhakaran R, Natarajan K. Ruthenium(III) complexes of dipicolinic acid with PPh3/AsPh3 as co-ligand: Synthesis and structural characterization. Polyhedron 2006. [DOI: 10.1016/j.poly.2006.01.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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33
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Wang G, Zhu X, Cheng Z, Zhu J. New ligands for the Fe(III)-mediated reverse atom transfer radical polymerization of methyl methacrylate. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21402] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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34
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Zhang X, Young MA, Lyandres O, Van Duyne RP. Rapid detection of an anthrax biomarker by surface-enhanced Raman spectroscopy. J Am Chem Soc 2005; 127:4484-9. [PMID: 15783231 DOI: 10.1021/ja043623b] [Citation(s) in RCA: 372] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A rapid detection protocol suitable for use by first-responders to detect anthrax spores using a low-cost, battery-powered, portable Raman spectrometer has been developed. Bacillus subtilis spores, harmless simulants for Bacillus anthracis, were studied using surface-enhanced Raman spectroscopy (SERS) on silver film over nanosphere (AgFON) substrates. Calcium dipicolinate (CaDPA), a biomarker for bacillus spores, was efficiently extracted by sonication in nitric acid and rapidly detected by SERS. AgFON surfaces optimized for 750 nm laser excitation have been fabricated and characterized by UV-vis diffuse reflectance spectroscopy and SERS. The SERS signal from extracted CaDPA was measured over the spore concentration range of 10(-14)-10(-12) M to determine the saturation binding capacity of the AgFON surface and to calculate the adsorption constant (Kspore=1.7 x 10(13) M(-1)). At present, an 11 min procedure is capable of achieving a limit of detection (LOD) of approximately 2.6 x 10(3) spores, below the anthrax infectious dose of 10(4) spores. The data presented herein also demonstrate that the shelf life of prefabricated AgFON substrates can be as long as 40 days prior to use. Finally, these sensing capabilities have been successfully transitioned from a laboratory spectrometer to a field-portable instrument. Using this technology, 10(4) bacillus spores were detected with a 5 s data acquisition period on a 1 month old AgFON substrate. The speed and sensitivity of this SERS sensor indicate that this technology can be used as a viable option for the field analysis of potentially harmful environmental samples.
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Affiliation(s)
- Xiaoyu Zhang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA
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Sarasanandarajah S, Kunnil J, Bronk BV, Reinisch L. Two-dimensional multiwavelength fluorescence spectra of dipicolinic acid and calcium dipicolinate. APPLIED OPTICS 2005; 44:1182-1187. [PMID: 15765697 DOI: 10.1364/ao.44.001182] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Dipicolinic acid (DPA) and the Ca2+ complex of DPA (CaDPA) are major chemical components of bacterial spores. With fluorescence being considered for the detection and identification of spores, it is important to understand the optical properties of the major components of the spores. We report in some detail on the room-temperature fluorescence excitation and emission spectra of DPA and its calcium ion complex and provide a comparison of the excitation-emission spectrum in a dry, wet paste and aqueous form. DPA solutions have weak, if any, fluorescence, with increased fluorescence when the DPA is dry. After exposure to a broad source UV light of the DPA, wet or dry, we observe a large increase in fluorescence with a maximum intensity emission peak at around 440 nm for excitation light with a wavelength of around 360 nm. There is a slight blueshift in the absorption spectra of UV-exposed DPA from the unexposed DPA solution. CaDPA in solution shows a slight fluorescence with increased fluorescence in the dry form, and a substantial increase of fluorescence was observed after UV exposure with an emission peak of around 410 nm for excitation around 305 nm. The detailed excitation-emission spectra are necessary for better interpretation of the fluorescence spectra of bacterial spores where DPA is a major chemical component.
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36
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Ma C, Chen C, Chen F, Zhang X, Zhu H, Liu Q, Liao D, Li L. Syntheses and Structures of Three Types of Hybrid Metal Dipicolinato Complexes Induced by Alkali Metal Ion and the Semiconductor Character. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2003. [DOI: 10.1246/bcsj.76.301] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ablett S, Darke AH, Lillford PJ, Martin DR. Glass formation and dormancy in bacterial spores. Int J Food Sci Technol 2001. [DOI: 10.1046/j.1365-2621.1999.00240.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Steve Ablett
- Unilever Research, Colworth Laboratory, Sharnbrook, Bedford MK44 1LQ, UK
| | - Arthur H. Darke
- Unilever Research, Colworth Laboratory, Sharnbrook, Bedford MK44 1LQ, UK
| | - Peter J. Lillford
- Unilever Research, Colworth Laboratory, Sharnbrook, Bedford MK44 1LQ, UK
| | - David R. Martin
- Unilever Research, Colworth Laboratory, Sharnbrook, Bedford MK44 1LQ, UK
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38
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A new route for the synthesis of bis(pyridine dicarboxylato)bis(triphenylphosphine) complexes of ruthenium(II) and X-ray structural characterisation of the biologically active trans-[Ru(PPh3)2(L1H)2] (L1H2=pyridine 2,3-dicarboxylic acid). Polyhedron 2001. [DOI: 10.1016/s0277-5387(01)00736-7] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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39
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Hameka HF, Jensen JO, Jensen JL, Merrow CN, Vlahacos CP. Theoretical studies of the fluorescence of dipicolinic acid and its anion. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0166-1280(96)04487-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Munakata N, Saito M, Hieda K. Inactivation action spectra of Bacillus subtilis spores in extended ultraviolet wavelengths (50-300 nm) obtained with synchrotron radiation. Photochem Photobiol 1991; 54:761-8. [PMID: 1798752 DOI: 10.1111/j.1751-1097.1991.tb02087.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Five types of Bacillus subtilis spores (UVR, UVS, UVP, RCE, and RCF) differing in repair and/or recombinational capabilities were exposed to monochromatic radiations at 13 wavelengths from 50 to 300 nm in vacuum. An improved biological irradiation system connected to a synchrotron radiation source was used to produce monochromatic UV radiation in this extended wavelength range with sufficient fluence to inactivate bacterial spores. From the survival curves obtained, the action spectra for the inactivation of the spores were depicted. Recombination-deficient RCE (recE) and RCF (recF) spores were more sensitive than the wild-type UVR spores in the entire range of wavelengths. This was considered to mean that DNA was the major target for the inactivation of the spores. Vacuum-UV radiations of 125-175 nm were effective in killing the spores, and distinct peaks of the sensitivity were seen with all types of the spores. Insensitivities at 190 and 100 nm were common to all five types of spores, indicating that these wavelengths were particularly impenetrant and absorbed by the outer layer materials. The vacuum-UV peaks centering at 150 nm were prominent in the spores defective in recombinational repair, while the far-UV peaks at around 235 and 270 nm were prominent in the UVS (uvrA ssp) and UVP (uvrA ssp polA) spores deficient in removal mechanisms of spore photoproducts. Thus, the profiles of the action spectra were explained by three factors; the penetration depth of each radiation in a spore, the efficiency of producing DNA damage that could cause inactivation, and the repair capacity of each type of spore.
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Affiliation(s)
- N Munakata
- Radiobiology Division, National Cancer Center Research Institute, Tokyo, Japan
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41
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Lundin RE, Sacks LE. High-resolution solid-state 13C nuclear magnetic resonance of bacterial spores: identification of the alpha-carbon signal of dipicolinic acid. Appl Environ Microbiol 1988; 54:923-8. [PMID: 3132103 PMCID: PMC202574 DOI: 10.1128/aem.54.4.923-928.1988] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Natural-abundance solid-state 13C nuclear magnetic resonance spectra were obtained for bacterial spores for the first time by using the technique of cross-polarization magic-angle-spinning nuclear magnetic resonance spectroscopy. A resonance at about 150 ppm, detectable in spore samples having a Mn content of less than 0.05%, was consistent with an identification as the alpha-carbon signal of calcium dipicolinate; this signal was missing from a spore sample treated with acid to release dipicolinate and from a spore coat preparation. Carbohydrate peaks were particularly intense in spores and coat preparations of Bacillus macerans. Signals ascribable to beta-hydroxybutyrate were prominent in a B. cereus sample.
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Affiliation(s)
- R E Lundin
- Western Regional Research Center, U.S. Department of Agriculture, Berkeley, California 94710
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Kamat AS, Pradhan DS. Involvement of calcium and dipicolinic acid in the resistance of Bacillus cereus BIS-59 spores to u.v. and gamma radiations. INTERNATIONAL JOURNAL OF RADIATION BIOLOGY AND RELATED STUDIES IN PHYSICS, CHEMISTRY, AND MEDICINE 1987; 51:7-18. [PMID: 3100469 DOI: 10.1080/09553008714550441] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The role of dipicolinic acid (DPA) in determining the resistance of Bacillus cereus spores to u.v. and gamma radiation was investigated. B. cereus BIS-59 spores containing varying amounts of DPA were prepared by appropriate compositional adjustments in the secondary media. Compared with spores containing 6 per cent DPA (dry weight) those containing 0.8 per cent DPA were far more sensitive to u.v. radiation. Similar u.v. radiation sensitivity was also found in respect of a DPA-less mutant of B. cereus T 6A 1. Pre-treatment of DPA deficient spores (of wild type or mutant B. cereus) with DPA or the presence of DPA during irradiation resulted in increased resistance of these spores to u.v. radiation. In the range 0.2 to 1 per cent DPA content of spores of B. cereus BIS-59, a striking inverse relationship could be discerned between the DPA content and the number of spore photo-products (5-thymidyl, 5,6-dihydrothymine) formed in DNA and spore viability. The resistance of B. cereus spores to gamma radiation did not seem to be influenced by their DPA content.
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Shibata H, Taniguchi J, Komuro M, Ohe M, Yamashita S, Tani I. Resonance Raman scattering by bacterial spores. FEMS Microbiol Lett 1986. [DOI: 10.1111/j.1574-6968.1986.tb01349.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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An electron paramagnetic resonance study of the manganese environment within dormant spores of Bacillus megaterium KM. Biochim Biophys Acta Gen Subj 1982. [DOI: 10.1016/0304-4165(82)90349-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
The structure of the skeleton of spores of Bacillus megaterium was examined after ashing in a plasma asher and the elemental composition of the ashed whole spores was determined with an analytical electron microscope. All spores were ashed in situ although they shrank by about 15%. Even P and S, in addition to metals, were recovered well from ashed samples. Ash was rich in the core and the coat, and poor in the cortex. Ca, P, S, and Mg were detected in the core and coat of the spore of B. megaterium QM B1551. Ca in the core was markedly decreased by germination or autoclaving. In the spore of B. megaterium ATCC 19213, almost all of the ash was detected in the core and its elemental composition was similar to that of the core of the strain QM B1551 spore. These reuslts suggest strongly that the core is the site of Ca associated with dipicolinic acid.
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Woodruff WH, Spiro TG, Gilvarg C. Raman spectroscopy in vivo: evidence on the structure of dipicolinate in intact spores of Bacillus megaterium. Biochem Biophys Res Commun 1974; 58:197-203. [PMID: 4208642 DOI: 10.1016/0006-291x(74)90911-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Abstract
Beta-attenuation analysis of intact spores of Bacillus megaterium containing tritium-labeled dipicolinic acid has shown that dipicolinic acid is located in the spore protoplast and not in the cortex.
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Aoki H, Slepecky RA. Inducement of a heat-shock requirement for germination and production of increased heat resistance in Bacillus fastidiosus spores by manganous ions. J Bacteriol 1973; 114:137-43. [PMID: 4698206 PMCID: PMC251749 DOI: 10.1128/jb.114.1.137-143.1973] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Bacillus fastidiosus, which requires uric acid or allantoin, grows and sporulates on a simple medium containing 59.5 mM uric acid, 5.7 mM K(2)HPO(4), and 2% agar in distilled water. Seventy to ninety percent sporulation was achieved in 96 h. Spores obtained on this medium do not need a heat shock prior to germination. The necessary germination conditions for this organism are 30 C, phosphate or this(hydroxymethyl)aminomethane buffer at pH 7.0, and 5.95 mM uric acid. Sporulation occurred earlier (48 h) and with higher frequency (greater than 99%) when Mn(2+) was added to the growth medium. However, these spores germinated only after heat activation (70 C, 30 min). The effectiveness of heat activation was directly dependent upon the concentration of Mn(2+) in the growth medium; 10(-5) M Mn(2+) was the minimal concentration for the effect. This phenomenon was not found upon addition of Ca(2+), Mg(2+), Fe(2+), Zn(2+), or Cu(2+) to the medium. The Mn(2+) content of the spores depended upon the concentration of Mn(2+) in the sporulation medium. There was a significant difference in heat resistance between spores harvested from unsupplemented medium and those harvested from medium supplemented with 5 x 10(-5) M Mn(2+). A D(85 C) value of 6.5 min was determined with the former, whereas the latter had a value of 17.0 min. Very little change in either Ca(2+) or dipicolinic acid content was detected in spores harvested from various Mn(2+)-supplemented media. Thus Mn(2+) may play a role in the inducement of the heat-shock requirement and the formation of spores with increased heat resistance.
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