101
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Kim D, Choi Y, Shin E, Jung YK, Kim BS. Sweet nanodot for biomedical imaging: carbon dot derived from xylitol. RSC Adv 2014. [DOI: 10.1039/c4ra01723d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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102
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Chinnathambi S, Chen S, Ganesan S, Hanagata N. Silicon quantum dots for biological applications. Adv Healthc Mater 2014; 3:10-29. [PMID: 23949967 DOI: 10.1002/adhm.201300157] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 06/21/2013] [Indexed: 11/06/2022]
Abstract
Semiconductor nanoparticles (or quantum dots, QDs) exhibit unique optical and electronic properties such as size-controlled fluorescence, high quantum yields, and stability against photobleaching. These properties allow QDs to be used as optical labels for multiplexed imaging and in drug delivery detection systems. Luminescent silicon QDs and surface-modified silicon QDs have also been developed as potential minimally toxic fluorescent probes for bioapplications. Silicon, a well-known power electronic semiconductor material, is considered an extremely biocompatible material, in particular with respect to blood. This review article summarizes existing knowledge related to and recent research progress made in the methods for synthesizing silicon QDs, as well as their optical properties and surface-modification processes. In addition, drug delivery systems and in vitro and in vivo imaging applications that use silicon QDs are also discussed.
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103
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Hu S, Zeng S, Zhang B, Yang C, Song P, Hang Danny TJ, Lin G, Wang Y, Anderson T, Coquet P, Liu L, Zhang X, Yong KT. Preparation of biofunctionalized quantum dots using microfluidic chips for bioimaging. Analyst 2014; 139:4681-90. [DOI: 10.1039/c4an00773e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Biofunctionalized quantum dots were prepared using microfluidic chips and were used as optical probes for imaging live cells.
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Affiliation(s)
- Siyi Hu
- School of Science
- Changchun University of Science and Technology
- Changchun 130022, China
- School of Electrical and Electronic Engineering
- Nanyang Technological University
| | - Shuwen Zeng
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
- CINTRA CNRS/NTU/THALES
- UMI 3288
| | - Butian Zhang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Chengbin Yang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Peiyi Song
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Tng Jian Hang Danny
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Guimiao Lin
- The Engineering Lab of Synthetic Biology and the Key Lab of Biomedical Engineering
- School of Medicine
- Shenzhen University
- Shenzhen 518060, China
| | - Yucheng Wang
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | - Tommy Anderson
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
| | | | - Liwei Liu
- School of Science
- Changchun University of Science and Technology
- Changchun 130022, China
- International Joint Research Center for Nanophotonics and Biophotonics
- Changchun University of Science and Technology
| | - Xihe Zhang
- School of Science
- Changchun University of Science and Technology
- Changchun 130022, China
- International Joint Research Center for Nanophotonics and Biophotonics
- Changchun University of Science and Technology
| | - Ken-Tye Yong
- School of Electrical and Electronic Engineering
- Nanyang Technological University
- Singapore 639798, Singapore
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104
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Napp LC, Templin C. What You See is What You Get? Imaging of Cell Therapy for Cardiac Regeneration. CURRENT CARDIOVASCULAR IMAGING REPORTS 2014. [DOI: 10.1007/s12410-013-9243-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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105
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Luo PG, Yang F, Yang ST, Sonkar SK, Yang L, Broglie JJ, Liu Y, Sun YP. Carbon-based quantum dots for fluorescence imaging of cells and tissues. RSC Adv 2014. [DOI: 10.1039/c3ra47683a] [Citation(s) in RCA: 253] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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106
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Hossain MA, Frampton AE, Bagul A. Challenges facing in vivo tracking of mesenchymal stem cells used for tissue regeneration. Expert Rev Med Devices 2013; 11:9-13. [PMID: 24308739 DOI: 10.1586/17434440.2014.865306] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Bone marrow-derived mesenchymal stem cells (MSCs) are increasingly being investigated in the field of regenerative medicine. In vivo monitoring of MSCs can be performed with MRI, which is a non-invasive, non-toxic and clinically acceptable modality. In order to track these MSCs, cells must be labeled with detectable magnetic nanoparticles. However, they 'leak' from labeled cells, limiting their surveillance to a 3-week period. Li et al. developed a rodent model in order to evaluate MRI monitoring of intramuscularly injected aminopropyltriethoxysilane iron oxide-labeled MSCs. Both in vivo tracking and histological analysis were undertaken. Seeded MSCs demonstrated increased MRI signal in the labeled test group over 3 weeks compared with the unlabeled controls. Histological Prussian blue staining of posttermination tissues confirmed these findings. The authors conclude that successful labeling of MSCs is possible with aminopropyltriethoxysilane - magnetic nanoparticles and that these cells can be monitored in vivo. They offer this form of labeling as an alternative to more common dextran-coated magnetic nanoparticles.
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Affiliation(s)
- Mohammad A Hossain
- Renal Transplant and Vascular Access Department, St. George's Healthcare NHS Trust, Blackshaw Road, London SW17 0QT, UK
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107
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Kwakowsky A, Potapov D, Abrahám IM. Tracking of single receptor molecule mobility in neuronal membranes: a quick theoretical and practical guide. J Neuroendocrinol 2013; 25:1231-7. [PMID: 23927034 DOI: 10.1111/jne.12083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 07/29/2013] [Accepted: 08/03/2013] [Indexed: 11/28/2022]
Abstract
Single-molecule detection enables us to visualise the real-time dynamics of individual molecules in live cells. We review the recent advancements in single-molecule fluorescence tracking of receptor protein mobility in the neuronal membrane. First, we discuss the practical consideration of single-molecule tracking in neurones, including the choice of cells and possible fluorescent labelling, as well as the appropriate optical set-up and imaging technology. We then describe the analysis of the single-molecule imaging data, including its theoretical and practical aspects of and relevant estimations of the biophysical parameters. Finally, we provide an example of a single-molecule tracking study in neuroendocrinology and highlight the next frontiers of single-molecule detection technologies.
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Affiliation(s)
- A Kwakowsky
- Centre for Neuroendocrinology and Department of Physiology, Otago School of Medical Sciences, University of Otago, Dunedin, New Zealand
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108
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Quantum dot–NBD–liposome luminescent probes for monitoring phospholipase A2 activity. Anal Bioanal Chem 2013; 405:9729-37. [DOI: 10.1007/s00216-013-7422-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 07/30/2013] [Accepted: 10/07/2013] [Indexed: 11/26/2022]
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109
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Hosseini M, Ganjali MR, Vaezi Z, Faridbod F, Arabsorkhi B, Sheikhha MH. Selective recognition of dysprosium(III) ions by enhanced chemiluminescence CdSe quantum dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 121:116-120. [PMID: 24231747 DOI: 10.1016/j.saa.2013.10.074] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 10/09/2013] [Accepted: 10/17/2013] [Indexed: 06/02/2023]
Abstract
The intensity of emitted light from CdSe quantum dots (QDs)-H2O2 is described as a novel chemiluminescence (CL) reaction for determination of dysprosium. This reaction is based on the catalytic effect of Dy(3+) ions, causing a significant increase in the light emission, as a result of the reaction of quantum dots (QDs) with hydrogen peroxide. In the optimum conditions, this method was satisfactorily described by linear calibration curve in the range of 8.3×10(-7)-5.0×10(-6)M, the detection limit of 6.0×10(-8)M, and the relative standard deviation for five determinations of 2.5×10(-6)M Dy(3+) 3.2%. The main experimental advantage of the proposed method is its selective to Dy(3+) ions compared with common coexisting cations, therefore, it was successfully applied for the determination of dysprosium ions in water samples.
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Affiliation(s)
- Morteza Hosseini
- Department of Life Science Engineering, Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran.
| | - Mohammad R Ganjali
- Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran; Biosensor Research Center, Endocrinology and Metabolism Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Vaezi
- Dipartimento di Scienze e Tecnologie Chimiche, Universita' di Roma Tor Vergata, 00133 Rome, Italy
| | - Farnoush Faridbod
- Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran; Biosensor Research Center, Endocrinology and Metabolism Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Batool Arabsorkhi
- Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran
| | - Mohammad H Sheikhha
- International Campus, Shahid Sadoughi University of Medical Science, Yazd, Iran
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110
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Ma Q, Li Y, Lin ZH, Tang G, Su XG. A novel ascorbic acid sensor based on the Fe3+/Fe2+ modulated photoluminescence of CdTe quantum dots@SiO2 nanobeads. NANOSCALE 2013; 5:9726-9731. [PMID: 24056856 DOI: 10.1039/c3nr03060a] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, CdTe quantum dot (QD)@silica nanobeads were used as modulated photoluminescence (PL) sensors for the sensing of ascorbic acid in aqueous solution for the first time. The sensor was developed based on the different quenching effects of Fe(2+) and Fe(3+) on the PL intensity of the CdTe QD@ silica nanobeads. Firstly, the PL intensity of the CdTe QDs was quenched in the presence of Fe(3+). Although both Fe(2+) and Fe(3+) could quench the PL intensity of the CdTe QDs, the quenching efficiency were quite different for Fe(2+) and Fe(3+). The PL intensity of the CdTe QD@silica nanobeads can be quenched by about 15% after the addition of Fe(3+) (60 μmol L(-1)), while the PL intensity of the CdTe QD@silica nanobeads can be quenched about 49% after the addition of Fe(2+) (60 μmol L(-1)). Therefore, the PL intensity of the CdTe QD@silica nanobeads decreased significantly when Fe(3+) was reduced to Fe(2+) by ascorbic acid. To confirm the strategy of PL modulation in this sensing system, trace H2O2 was introduced to oxidize Fe(2+) to Fe(3+). As a result, the PL intensity of the CdTe QD@silica nanobeads was partly recovered. The proposed sensor could be used for ascorbic acid sensing in the concentration range of 3.33-400 μmol L(-1), with a detection limit (3σ) of 1.25 μmol L(-1) The feasibility of the proposed sensor for ascorbic acid determination in tablet samples was also studied, and satisfactory results were obtained.
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Affiliation(s)
- Qiang Ma
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China.
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111
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Chang JC, Rosenthal SJ. A Bright Light to Reveal Mobility: Single Quantum Dot Tracking Reveals Membrane Dynamics and Cellular Mechanisms. J Phys Chem Lett 2013; 4:2858-2866. [PMID: 28626534 PMCID: PMC5473254 DOI: 10.1021/jz401071g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This perspective describes recent progress in single quantum dot techniques, with an emphasis on their applications in exploring membrane dynamics and cellular mechanisms. In these cases, conventional population measurements, such as fluorescence recovery after photobleaching, yield only a mean value on an ensemble or bulk collection of molecules, where the behavior of individual proteins and vehicles is missing. In recent years, the single quantum dot imaging approach has been introduced as a sub-category of single molecule fluorescent techniques to reveal single protein/vehicle dynamics in real-time. One of the major advantages of using single quantum dots is the high signal-to-noise ratio originating from their unique photophysical properties such as extraordinarily high molar extinction coefficients and large effective Stokes shifts. In addition to a brief overview on the principle of single quantum dot imaging techniques, we highlight recent discoveries and discuss future directions in the field.
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Affiliation(s)
- Jerry C. Chang
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235
| | - Sandra J. Rosenthal
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235
- Department of Pharmacology, Chemical and Biomolecular Engineering, Physics and Astronomy, and Vanderbilt Institute of Nanoscale Science and Engineering, Vanderbilt University, Nashville, TN 37235
- Department of Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
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112
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Nagaraja AT, Sooresh A, Meissner KE, McShane MJ. Processing and characterization of stable, pH-sensitive layer-by-layer modified colloidal quantum dots. ACS NANO 2013; 7:6194-6202. [PMID: 23782214 DOI: 10.1021/nn402061t] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Quantum Dots (QDs) stabilized with dihydrolipoic acid (DHLA) were used as a template for layer-by-layer (LbL) modification to study the effect on the QD optical properties. We studied several different polyelectrolytes to determine that large quantities of monodisperse DHLA-QDs could only be obtained with the weak polyelectrolyte pair of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA). The key to this success was the development of a two-step method to split the LbL process into adsorption and centrifugation phases, which require different pH solutions for optimum success. Solution pH is highlighted as an important factor to achieve sufficient QD surface coverage and QD recovery during wash cycles. We optimized the process to scale up synthesis by introducing a solvent precipitation step before ultracentrifugation that, when coupled with the correct pH conditions, results in a mean QD recovery of 86-90% after three wash cycles. We found that adsorption of PAH had a negligible effect on the quantum yield and lifetime but an additional layer of PAA resulted in a substantial decrease in both quantum yield and lifetime that could not be recovered by the addition of more layers. The PAH coating provides a protective coating that extends DHLA-QDs stability, prevents photo-oxidation mediated aggregation, alleviates concerns over batch variability, and results in pH-dependent emission.
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Affiliation(s)
- Ashvin T Nagaraja
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, USA
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113
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Fox PD, Haberkorn CJ, Weigel AV, Higgins JL, Akin EJ, Kennedy MJ, Krapf D, Tamkun MM. Plasma membrane domains enriched in cortical endoplasmic reticulum function as membrane protein trafficking hubs. Mol Biol Cell 2013; 24:2703-13. [PMID: 23864710 PMCID: PMC3756922 DOI: 10.1091/mbc.e12-12-0895] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
In mammalian cells, the cortical endoplasmic reticulum (cER) is a network of tubules and cisterns that lie in close apposition to the plasma membrane (PM). We provide evidence that PM domains enriched in underlying cER function as trafficking hubs for insertion and removal of PM proteins in HEK 293 cells. By simultaneously visualizing cER and various transmembrane protein cargoes with total internal reflectance fluorescence microscopy, we demonstrate that the majority of exocytotic delivery events for a recycled membrane protein or for a membrane protein being delivered to the PM for the first time occur at regions enriched in cER. Likewise, we observed recurring clathrin clusters and functional endocytosis of PM proteins preferentially at the cER-enriched regions. Thus the cER network serves to organize the molecular machinery for both insertion and removal of cell surface proteins, highlighting a novel role for these unique cellular microdomains in membrane trafficking.
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Affiliation(s)
- Philip D Fox
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA
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114
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Zhao P, Zhou L, Nie Z, Xu X, Li W, Huang Y, He K, Yao S. Versatile electrochemiluminescent biosensor for protein-nucleic acid interaction based on the unique quenching effect of deoxyguanosine-5'-phosphate on electrochemiluminescence of CdTe/ZnS quantum dots. Anal Chem 2013; 85:6279-86. [PMID: 23742234 DOI: 10.1021/ac4004437] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In this paper, the efficient quenching effect of deoxyguanosine-5'-phosphate (dGMP) on anodic electrochemiluminescence (ECL) of the CdTe/ZnS quantum dots (QDs) is reported for the first time. This ECL quenching was found to be specific for free dGMP and not observed for dGMP residues in different DNA structures. The unique dGMP-based QDs ECL quenching was then utilized to develop a versatile biosensing strategy to determine various protein-DNA interactions with the assistance of exonuclease, Exo I, to hydrolyze DNA and liberate dGMP. Taking single-stranded DNA binding protein (SSB) and thrombin as examples, two novel detection modes have been developed based on dGMP-QDs ECL strategy. The first method used hairpin probes and SSB-promoted probe cleavage by Exo I for facile signal-off detection of SSB, with a wide linear range of 1-200 nM and a low detection limit of 0.1 nM. The second method exploited aptamer-thrombin binding to protect probes against Exo I degradation for sensitive signal-on detection of thrombin, giving a linear response over a range of 1-150 nM and a detection limit as low as 0.1 nM. Both methods were homogeneous and label-free without QDs or DNA modification. Therefore, this dGMP-specific QDs ECL quenching presents a promising detection mechanism suitable for probing various protein-nucleic acid interactions.
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Affiliation(s)
- Peng Zhao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People's Republic of China
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115
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Samir TM, Mansour MMH, Kazmierczak SC, Azzazy HME. Quantum dots: heralding a brighter future for clinical diagnostics. Nanomedicine (Lond) 2013; 7:1755-69. [PMID: 23210715 DOI: 10.2217/nnm.12.147] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Quantum dots (QDs) are semiconductor nanocrystals that possess unique optical properties including broad-range excitation, size-tunable narrow emission spectra and high photostability, giving them considerable value in various biomedical applications. The size and composition of QDs can be varied to obtain the desired emission properties and make them amenable to simultaneous detection of multiple targets. Furthermore, numerous surface functionalizations can be used to adapt QDs to the needed application. The successful use of QDs has been reported in the areas of in vitro diagnostics and imaging. There is also potential for multimodal applications for simultaneous imaging. Toxicity issues are still a prime concern with regards to in vivo applications on account of the toxic constituents of QDs.
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Affiliation(s)
- Tamer M Samir
- Yousef Jameel Science & Technology Research Center, The American University in Cairo, New Cairo, Egypt
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116
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Prasad BB, Prasad A, Tiwari MP. Quantum dots-multiwalled carbon nanotubes nanoconjugate-modified pencil graphite electrode for ultratrace analysis of hemoglobin in dilute human blood samples. Talanta 2013; 109:52-60. [DOI: 10.1016/j.talanta.2013.01.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 01/24/2013] [Accepted: 01/25/2013] [Indexed: 11/27/2022]
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117
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Chen O, Zhao J, Chauhan VP, Cui J, Wong C, Harris DK, Wei H, Han HS, Fukumura D, Jain RK, Bawendi MG. Compact high-quality CdSe-CdS core-shell nanocrystals with narrow emission linewidths and suppressed blinking. NATURE MATERIALS 2013; 12:445-51. [PMID: 23377294 PMCID: PMC3677691 DOI: 10.1038/nmat3539] [Citation(s) in RCA: 657] [Impact Index Per Article: 59.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 12/04/2012] [Indexed: 05/17/2023]
Abstract
High particle uniformity, high photoluminescence quantum yields, narrow and symmetric emission spectral lineshapes and minimal single-dot emission intermittency (known as blinking) have been recognized as universal requirements for the successful use of colloidal quantum dots in nearly all optical applications. However, synthesizing samples that simultaneously meet all these four criteria has proven challenging. Here, we report the synthesis of such high-quality CdSe-CdS core-shell quantum dots in an optimized process that maintains a slow growth rate of the shell through the use of octanethiol and cadmium oleate as precursors. In contrast with previous observations, single-dot blinking is significantly suppressed with only a relatively thin shell. Furthermore, we demonstrate the elimination of the ensemble luminescence photodarkening that is an intrinsic consequence of quantum dot blinking statistical ageing. Furthermore, the small size and high photoluminescence quantum yields of these novel quantum dots render them superior in vivo imaging agents compared with conventional quantum dots. We anticipate these quantum dots will also result in significant improvement in the performance of quantum dots in other applications such as solid-state lighting and illumination.
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Affiliation(s)
- Ou Chen
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge MA 02139 (USA)
| | - Jing Zhao
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge MA 02139 (USA)
| | - Vikash P. Chauhan
- Massachusetts General Hospital and Harvard Medical School, 100 Blossom St., Boston, MA 02114 (USA)
| | - Jian Cui
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge MA 02139 (USA)
| | - Cliff Wong
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge MA 02139 (USA)
| | - Daniel K. Harris
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge MA 02139 (USA)
| | - He Wei
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge MA 02139 (USA)
| | - Hee-Sun Han
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge MA 02139 (USA)
| | - Dai Fukumura
- Massachusetts General Hospital and Harvard Medical School, 100 Blossom St., Boston, MA 02114 (USA)
| | - Rakesh K. Jain
- Massachusetts General Hospital and Harvard Medical School, 100 Blossom St., Boston, MA 02114 (USA)
| | - Moungi G. Bawendi
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge MA 02139 (USA)
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118
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Singh AK, Pandey A, Tewari M, Kumar R, Sharma A, Pandey HP, Shukla HS. Prospects of nano-material in breast cancer management. Pathol Oncol Res 2013; 19:155-65. [PMID: 23435835 DOI: 10.1007/s12253-013-9609-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Accepted: 02/04/2013] [Indexed: 01/19/2023]
Abstract
Breast cancer evaluation and early diagnosis are core complexity worldwide and an ambiguity for scientists till date. Nano-materials are innovative tools for rapid diagnosis and therapy, which may induce an immense result in the field of oncology. Their exceptional size-dependent properties make them special and superior materials and quite indispensable in several fields of the human activities. The major obstacle in finding cure for malignant breast cancer is to increase in development of resistances for tumors to the therapeutic treatments. The widespread mammo-graph particle is being developed by nations to diagnosis disease in primitive stage to decline the mortality rates caused by breast carcinoma. The advancement of nano-particle based diagnostic tools facilitates in evaluation and provides encouraging development in breast cancer therapeutics. In this compact review, efforts have been made to compose the current advancements in the area of functional nano-particles. Furthermore, in vivo and in vitro applications of nano-materials in breast cancer management are also discussed.
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Affiliation(s)
- A K Singh
- Department of Surgical Oncology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221005, India.
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119
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Xu Y, Wu M, Feng XZ, Yin XB, He XW, Zhang YK. Reduced Carbon Dots versus Oxidized Carbon Dots: Photo- and Electrochemiluminescence Investigations for Selected Applications. Chemistry 2013; 19:6282-8. [DOI: 10.1002/chem.201204372] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2012] [Indexed: 11/07/2022]
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120
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Sott K, Eriksson E, Petelenz E, Goksör M. Optical systems for single cell analyses. Expert Opin Drug Discov 2013; 3:1323-44. [PMID: 23496168 DOI: 10.1517/17460441.3.11.1323] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Data extracted from a population of cells represent the average response from all cells within the population. Even when the cells are genetically identical, cell-to-cell variations and genetic noise can make the cells respond in completely different ways. To understand the mechanisms behind the behaviour of a population, the cells must also be analysed on an individual basis. OBJECTIVE This review highlights the use of optical manipulation, microfluidics and advanced fluorescence imaging techniques for the acquisition of single cell data. CONCLUSION By implementation of these three techniques, it is possible to achieve a deeper insight into the principles underlying cellular functioning and a more thorough understanding of the phenomena often observed in cell populations, thus facilitating research in drug discovery.
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Affiliation(s)
- Kristin Sott
- Postdoctoral fellow University of Gothenburg, Department of Physics, SE-41296, Gothenburg, Sweden
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121
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Wu HF, Gopal J, Abdelhamid HN, Hasan N. Quantum dot applications endowing novelty to analytical proteomics. Proteomics 2013; 12:2949-61. [PMID: 22930415 DOI: 10.1002/pmic.201200295] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This review surveys all the state-of-art applications of quantum dots (QDs) in conventional and modern analytical methods in proteomic studies. A brief introduction of QDs and their properties is initially presented followed by outlining the application of QDs in fluorescence, MS, imaging, and cancer-based proteomics. The in-depth application of QDs in MALDI-MS and surface assisted laser desorption/ionization-MS has been elaborately discussed, summarizing the speculated mechanism behind the protein-QDs interactions during QD matrix applications leading to enhanced detection sensitivity.
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Affiliation(s)
- Hui-Fen Wu
- Department of Chemistry, National Sun Yat Sen University, Kaohsiung, Taiwan.
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Affiliation(s)
- Jyoti K Jaiswal
- Department of Integrative Systems Biology, George Washington University and Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA.
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123
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Xu Y, Wu M, Liu Y, Feng XZ, Yin XB, He XW, Zhang YK. Nitrogen-Doped Carbon Dots: A Facile and General Preparation Method, Photoluminescence Investigation, and Imaging Applications. Chemistry 2013; 19:2276-83. [DOI: 10.1002/chem.201203641] [Citation(s) in RCA: 346] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Indexed: 11/06/2022]
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124
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Luo PG, Sahu S, Yang ST, Sonkar SK, Wang J, Wang H, LeCroy GE, Cao L, Sun YP. Carbon “quantum” dots for optical bioimaging. J Mater Chem B 2013; 1:2116-2127. [DOI: 10.1039/c3tb00018d] [Citation(s) in RCA: 644] [Impact Index Per Article: 58.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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125
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Takizawa T, Robinson JM. Correlative fluorescence and transmission electron microscopy in tissues. Methods Cell Biol 2012; 111:37-57. [PMID: 22857922 DOI: 10.1016/b978-0-12-416026-2.00003-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Correlative microscopy has meant different things over the years; currently, this term refers to imaging the same exact structures with two or more imaging modalities. This commonly involves combining fluorescence and electron microscopy. Much of the recent work related to correlative microscopy has been done using cell culture models. However, many biological questions cannot be addressed in these models, but require instead the 3-dimensional organization of cells found in tissues. Herein, we discuss some of the issues related to correlative microscopy of tissues including the major reporter systems presently available for correlative microscopy. We present data from our own work in which we have focused on the use of ultrathin cryosections of tissues as the substrate for immunolabeling to combine immunofluorescence and electron microscopy of the same sub-cellular structures.
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Affiliation(s)
- Toshihiro Takizawa
- Department of Molecular Anatomy, Nippon Medical School, Tokyo 113-8602, Japan
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126
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Selim A, Al-Sunaidi A, Tabet N. Effect of the surface texture and crystallinity of ZnO nanoparticles on their toxicity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.07.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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127
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128
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Zhang YP, Sun P, Zhang XR, Yang WL. In vitro gastric cancer cell imaging using near-infrared quantum dot-conjugated CC49. Oncol Lett 2012; 4:996-1002. [PMID: 23162639 DOI: 10.3892/ol.2012.870] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 08/08/2012] [Indexed: 11/06/2022] Open
Abstract
In this experiment, we developed a bioprobe label for immunofluorescence using gastric tumor-specific quantum dots (QDs) to detect gastric tumor cells in vitro. The fluorescent probe, which is capable of specifically labeling gastric tumor cells, was constructed by taking advantage of the unique and superior properties of QDs. We grafted primary QDs onto the tumor-associated glycoprotein 72 (TAG-72) monoclonal antibody CC49 to produce CC49-QDs that specifically label tumor cells. Following a series of tests on the diameter and emission spectrum of CC49-QDs, they were employed in immunofluorescence analysis. Transmission electron microscopy and fluorescence spectrum analyses indicated that CC49-QDs had a 0.25 nm higher average diameter than the primary QDs, and that the grafted CC49 had no difference in optical properties compared to the primary QDs. In cell imaging, the cells labeled with CC49-QDs generated brighter fluorescence compared with the cells of the primary QD group. The results of immunofluorescence analysis demonstrated that antibody grafting reinforced the specific binding of QDs to tumor cells. This probe may also be further applied to live gastric cancer animal models to track lymphatic metastasis. In addition, it may potentially offer theoretical support for lymphadenectomy in the treatment of gastric cancer.
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129
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Vannoy CH, Chong L, Le C, Krull UJ. A competitive displacement assay with quantum dots as fluorescence resonance energy transfer donors. Anal Chim Acta 2012; 759:92-9. [PMID: 23260681 DOI: 10.1016/j.aca.2012.10.049] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 10/21/2012] [Accepted: 10/28/2012] [Indexed: 12/16/2022]
Abstract
The unique optoelectronic properties of semiconductor quantum dots (QDs) make them well-suited as fluorescent bioprobes for use in various biological applications. Modification of CdSe/ZnS QDs with biologically relevant molecules provides for multipotent probes that can be used for cellular labeling, bioassays, and localized optical interrogation by means of fluorescence resonance energy transfer (FRET). Herein, we demonstrate the use of red-emitting streptavidin-coated QDs (QD(605)) as donors in FRET to introduce a competitive displacement-based assay for the detection of oligonucleotides. Various QD-DNA bioconjugates featuring 25-mer probe sequences diagnostic of Hsp23 were prepared. The single-stranded oligonucleotide probes were hybridized to dye-labeled (Alexa Fluor 647) reporter sequences, which were provided for a FRET-sensitized emission signal due to proximity of the QD and dye. The dye-labeled sequence was designed to be partially complementary and include base-pair mismatches to facilitate displacement by a more energetically favorable, fully complementary recognition motif embedded within a 98-mer displacer sequence. Overall, this study demonstrates proof-of-concept at the nM level for competitive displacement hybridization assays in vitro by reduction of fluorescence intensity that directly correlates to the presence of oligonucleotides of interest. This work demonstrates an analytical method that could potentially be implemented for monitoring of intracellular gene expression in the future.
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Affiliation(s)
- Charles H Vannoy
- Chemical Sensors Group, Department of Chemical and Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Rd. North, Mississauga, Ontario L5L 1C6, Canada
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130
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Chang JC, Kovtun O, Blakely RD, Rosenthal SJ. Labeling of neuronal receptors and transporters with quantum dots. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2012; 4:605-19. [PMID: 22887823 PMCID: PMC3753009 DOI: 10.1002/wnan.1186] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The ability to efficiently visualize protein targets in cells is a fundamental goal in biological research. Recently, quantum dots (QDots) have emerged as a powerful class of fluorescent probes for labeling membrane proteins in living cells because of breakthrough advances in QDot surface chemistry and biofunctionalization strategies. This review discusses the increasing use of QDots for fluorescence imaging of neuronal receptors and transporters. The readers are briefly introduced to QDot structure, photophysical properties, and common synthetic routes toward the generation of water-soluble QDots. The following section highlights several reports of QDot application that seek to unravel molecular aspects of neuronal receptor and transporter regulation and trafficking. This article is closed with a prospectus of the future of derivatized QDots in neurobiological and pharmacological research.
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Affiliation(s)
- Jerry C Chang
- Department of Chemistry, Vanderbilt University, Nashville, TN, USA
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131
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Somers RC, Snee PT, Bawendi MG, Nocera DG. Energy Transfer of CdSe/ZnS Nanocrystals Encapsulated with Rhodamine-Dye Functionalized Poly(acrylic acid). J Photochem Photobiol A Chem 2012; 248:24-29. [PMID: 24926175 DOI: 10.1016/j.jphotochem.2012.07.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Energy transfer between a CdSe/ZnS nanocrystal (NC) donor and a rhodamine isothiocyanate (RITC) acceptor has been achieved via a functionalized poly(acrylic acid) (PAA) encapsulating layer over the surface of the NC. The modification of PAA with both N-octylamine (OA) and 5-amino-1-pentanol (AP), [PAA-OA-AP], allows for the simultaneous water-solubilization and functionalization of the NCs, underscoring the ease of synthesizing NC-acceptor conjugates with this strategy. Photophysical studies of the NC-RITC constructs showed that energy transfer is efficient, with kFRET approaching 108 s-1. The ease of the covalent conjugation of molecules to NCs with PAA-OA-AP coating, together with efficient energy transfer, makes the NCs encapsulated with PAA-OA-AP attractive candidates for sensing applications.
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Affiliation(s)
- Rebecca C Somers
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139-4307
| | - Preston T Snee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, MC 111, Chicago IL, 60607
| | - Moungi G Bawendi
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139-4307
| | - Daniel G Nocera
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139-4307
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132
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Gupta BK, Narayanan TN, Vithayathil SA, Lee Y, Koshy S, Reddy ALM, Saha A, Shanker V, Singh VN, Kaipparettu BA, Martí AA, Ajayan PM. Highly luminescent-paramagnetic nanophosphor probes for in vitro high-contrast imaging of human breast cancer cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:3028-3034. [PMID: 22807340 DOI: 10.1002/smll.201200909] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Indexed: 06/01/2023]
Abstract
Highly luminescent-paramagnetic nanophosphors have a seminal role in biotechnology and biomedical research due to their potential applications in biolabeling, bioimaging, and drug delivery. Herein, the synthesis of high-quality, ultrafine, europium-doped yttrium oxide nanophosphors (Y(1.9)O(3):Eu(0.1)(3+)) using a modified sol-gel technique is reported and in vitro fluorescence imaging studies are demonstrated in human breast cancer cells. These highly luminescent nanophosphors with an average particle size of ≈6 nm provide high-contrast optical imaging and decreased light scattering. In vitro cellular uptake is shown by fluorescence microscopy, which visualizes the characteristic intense hypersensitive red emission of Eu(3+) peaking at 610 nm ((5)D(0)-(7)F(2)) upon 246 nm UV light excitation. No apparent cytotoxicity is observed. Subsequently, time-resolved emission spectroscopy and SQUID magnetometry measurements demonstrate a photoluminescence decay time in milliseconds and paramagnetic behavior, which assure applications of the nanophosphors in biomedical studies.
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Affiliation(s)
- Bipin Kumar Gupta
- National Physical Laboratory (CSIR), Dr K S Krishnan Road, New Delhi 110012, India.
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133
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Fan L, Hu Y, Wang X, Zhang L, Li F, Han D, Li Z, Zhang Q, Wang Z, Niu L. Fluorescence resonance energy transfer quenching at the surface of graphene quantum dots for ultrasensitive detection of TNT. Talanta 2012; 101:192-7. [PMID: 23158311 DOI: 10.1016/j.talanta.2012.08.048] [Citation(s) in RCA: 172] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 08/27/2012] [Accepted: 08/28/2012] [Indexed: 12/20/2022]
Abstract
This paper for the first time reports a chemical method to prepare graphene quantum dots (GQDs) from GO. Water soluble and surface unmodified GQDs, serving as a novel, effective and simple fluorescent sensing platform for ultrasensitive detection of 2,4,6-trinitrotoluene (TNT) in solution by fluorescence resonance energy transfer (FRET) quenching. The fluorescent GQDs can specifically bind TNT species by the π-π stacking interaction between GQDs and aromatic rings. The resultant TNT bound at the GQDs surface can strongly suppress the fluorescence emission by the FRET from GQDs donor to the irradiative TNT acceptor through intermolecular polar-polar interactions at spatial proximity. The unmodified GQDs can sensitively detect down to ~0.495 ppm (2.2 μM) TNT with the use of only 1 mL of GQDs solution. The simple FRET-based GQDs reported here exhibit high and stable fluorescence. Eliminating further treatment or modification, this method simplifies and shortens the experimental process. It possesses good assembly flexibility and can thus find many applications in the detection of ultratrace analytes.
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Affiliation(s)
- Lishuang Fan
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
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134
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Lin LP, Wang XX, Lin SQ, Zhang LH, Lin CQ, Li ZM, Liu JM. Research on the spectral properties of luminescent carbon dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 95:555-61. [PMID: 22580148 DOI: 10.1016/j.saa.2012.04.049] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 03/29/2012] [Accepted: 04/08/2012] [Indexed: 05/23/2023]
Abstract
This paper is trying to research the developing status of carbon dots (CDs), and the results show that the simple, rapid and high yield synthetic methods for CDs and the application of CDs in biological science and analysis field will certainly become an inevitable development trend in the future. The CDs obtained by microwave possess excellent optical properties including UV-Vis absorption, fluorescence and room temperature phosphorescence. Under the conditions of 30 °C and 10 min, the fluorescence signal (F) of CDs not only could be enhanced by hexadecyltrimethylammonium bromide (CTAB), Triton X-100, Na(2)S, Na(2)C(2)O(4) and NH(3).H(2)O, but also could be quenched by sodium dodecyl sulfate, KBrO(3), K(2)S(2)O(8), NaIO(4), ascorbic acid, NaBH(4), HNO(3), HCl, H(2)SO(4), CH(3)COOH and most metal ions, with the λ(em)(max) blue or red shifting in varying degrees, indicating the potential values of CDs in analytical application. Besides, the sensitive response of F to pH showed the promise of developing a new pH sensor with CDs.
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Affiliation(s)
- Li-ping Lin
- Department of Chemistry and Environmental Science, Zhangzhou Normal College, Zhangzhou 363000, PR China
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135
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Chien CC, Chen HH, Lai SF, Hwu Y, Petibois C, Yang CS, Chu Y, Margaritondo G. X-ray imaging of tumor growth in live mice by detecting gold-nanoparticle-loaded cells. Sci Rep 2012; 2:610. [PMID: 22934133 PMCID: PMC3429882 DOI: 10.1038/srep00610] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 05/10/2012] [Indexed: 11/17/2022] Open
Abstract
We show that sufficient concentrations of gold nanoparticles produced by an original synthesis method in EMT-6 and CT-26 cancer cells make it possible to detect the presence, necrosis and proliferation of such cells after inoculation in live mice. We first demonstrated that the nanoparticles do not interfere with the proliferation process. Then, we observed significant differences in the tumor evolution and the angiogenesis process after shallow and deep inoculation. A direct comparison with pathology optical images illustrates the effectiveness of this approach.
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Affiliation(s)
- Chia-Chi Chien
- Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan
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136
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Han SM, Lee HW, Bhang DH, Seo KW, Youn HY. Canine mesenchymal stem cells are effectively labeled with silica nanoparticles and unambiguously visualized in highly autofluorescent tissues. BMC Vet Res 2012; 8:145. [PMID: 22920604 PMCID: PMC3514211 DOI: 10.1186/1746-6148-8-145] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Accepted: 08/15/2012] [Indexed: 11/25/2022] Open
Abstract
Background Development of a method for long-term labeling of cells is critical to elucidate transplanted cell fate and migration as well as the contribution to tissue regeneration. Silica nanoparticles have been recently developed and demonstrated to be biocompatible with a high labeling capacity. Thus, our study was designed to assess the suitability of silica nanoparticles for labeling canine mesenchymal stem cells (MSCs) and the fluorescence afficiency in highly autofluorescent tissue. Results We examined the effect of silica nanoparticle labeling on stem cell morphology, viability and differentiation as compared with those of unlabeled control cells. After 4 h of incubation with silica nanoparticles, they were internalized by canine MSCs without a change in the morphology of cells compared with that of control cells. The viability and proliferation of MSCs labeled with silica nanoparticles were evaluated by a WST-1 assay and trypan blue exclusion. No effects on cell viability were observed, and the proliferation of canine MSCs was not inhibited during culture with silica nanoparticles. Furthermore, adipogenic and osteogenic differentiation of silica nanoparticle-labeled canine MSCs was at a similar level compared with that of unlabeled cells, indicating that silica nanoparticle labeling did not alter the differentiation capacity of canine MSCs. Silica nanoparticle-labeled canine MSCs were injected into the kidneys of BALB/c mice after celiotomy, and then the mice were sacrificed after 2 or 3 weeks. The localization of injected MSCs was closely examined in highly autofluorescent renal tissues. Histologically, canine MSCs were uniformly and completely labeled with silica nanoparticles, and were unambiguously imaged in histological sections. Conclusions The results of the current study showed that silica nanoparticles are useful as an effective labeling marker for MSCs, which can elucidate the distribution and fate of transplanted MSCs.
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Affiliation(s)
- Sei-Myoung Han
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, Korea
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137
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Deutsch E, Weigel AV, Akin EJ, Fox P, Hansen G, Haberkorn CJ, Loftus R, Krapf D, Tamkun MM. Kv2.1 cell surface clusters are insertion platforms for ion channel delivery to the plasma membrane. Mol Biol Cell 2012; 23:2917-29. [PMID: 22648171 PMCID: PMC3408418 DOI: 10.1091/mbc.e12-01-0047] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Voltage-gated K+ (Kv) channels regulate membrane potential in many cell types. Although the channel surface density and location must be well controlled, little is known about Kv channel delivery and retrieval on the cell surface. The Kv2.1 channel localizes to micron-sized clusters in neurons and transfected human embryonic kidney (HEK) cells, where it is nonconducting. Because Kv2.1 is postulated to be involved in soluble N-ethylmaleimide–sensitive factor attachment protein receptor–mediated membrane fusion, we examined the hypothesis that these surface clusters are specialized platforms involved in membrane protein trafficking. Total internal reflection–based fluorescence recovery after photobleaching studies and quantum dot imaging of single Kv2.1 channels revealed that Kv2.1-containing vesicles deliver cargo at the Kv2.1 surface clusters in both transfected HEK cells and hippocampal neurons. More than 85% of cytoplasmic and recycling Kv2.1 channels was delivered to the cell surface at the cluster perimeter in both cell types. At least 85% of recycling Kv1.4, which, unlike Kv2.1, has a homogeneous surface distribution, is also delivered here. Actin depolymerization resulted in Kv2.1 exocytosis at cluster-free surface membrane. These results indicate that one nonconducting function of Kv2.1 is to form microdomains involved in membrane protein trafficking. This study is the first to identify stable cell surface platforms involved in ion channel trafficking.
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Affiliation(s)
- Emily Deutsch
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523
| | - Aubrey V. Weigel
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523
| | - Elizabeth J. Akin
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523
| | - Phil Fox
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523
| | - Gentry Hansen
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523
| | | | - Rob Loftus
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523
| | - Diego Krapf
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523
- Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523
| | - Michael M. Tamkun
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523
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138
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Lee CN, Wang YM, Lai WF, Chen TJ, Yu MC, Fang CL, Yu FL, Tsai YH, Chang WS, Zuo C, Renshaw P. Super-paramagnetic iron oxide nanoparticles for use in extrapulmonary tuberculosis diagnosis. Clin Microbiol Infect 2012; 18:E149-57. [DOI: 10.1111/j.1469-0691.2012.03809.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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139
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Ransohoff JD, Wu JC. Imaging stem cell therapy for the treatment of peripheral arterial disease. Curr Vasc Pharmacol 2012; 10:361-73. [PMID: 22239638 PMCID: PMC3683543 DOI: 10.2174/157016112799959404] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Revised: 06/28/2011] [Accepted: 10/19/2011] [Indexed: 01/08/2023]
Abstract
Arteriosclerotic cardiovascular diseases are among the leading causes of morbidity and mortality worldwide. Therapeutic angiogenesis aims to treat ischemic myocardial and peripheral tissues by delivery of recombinant proteins, genes, or cells to promote neoangiogenesis. Concerns regarding the safety, side effects, and efficacy of protein and gene transfer studies have led to the development of cell-based therapies as alternative approaches to induce vascular regeneration and to improve function of damaged tissue. Cell-based therapies may be improved by the application of imaging technologies that allow investigators to track the location, engraftment, and survival of the administered cell population. The past decade of investigations has produced promising clinical data regarding cell therapy, but design of trials and evaluation of treatments stand to be improved by emerging insight from imaging studies. Here, we provide an overview of pre-clinical and clinical experience using cell-based therapies to promote vascular regeneration in the treatment of peripheral arterial disease. We also review four major imaging modalities and underscore the importance of in vivo analysis of cell fate for a full understanding of functional outcomes.
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Affiliation(s)
- Julia D. Ransohoff
- Department of Medicine, Division of Cardiology, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Radiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Joseph C. Wu
- Department of Medicine, Division of Cardiology, Stanford University School of Medicine, Stanford, CA 94305, USA
- Department of Radiology, Stanford University School of Medicine, Stanford, CA 94305, USA
- Institute of Regenerative Medicine and Stem Cell Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
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140
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Thimm BW, Hofmann S, Schneider P, Carretta R, Müller R. Imaging of Cellular Spread on a Three-Dimensional Scaffold by Means of a Novel Cell-Labeling Technique for High-Resolution Computed Tomography. Tissue Eng Part C Methods 2012; 18:167-75. [DOI: 10.1089/ten.tec.2011.0262] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Benjamin W. Thimm
- Department for Mechanical and Process Engineering, Institute for Biomechanics, ETH Zürich, Zürich, Switzerland
| | - Sandra Hofmann
- Department for Mechanical and Process Engineering, Institute for Biomechanics, ETH Zürich, Zürich, Switzerland
| | - Philipp Schneider
- Department for Mechanical and Process Engineering, Institute for Biomechanics, ETH Zürich, Zürich, Switzerland
| | - Roberto Carretta
- Department for Mechanical and Process Engineering, Institute for Biomechanics, ETH Zürich, Zürich, Switzerland
| | - Ralph Müller
- Department for Mechanical and Process Engineering, Institute for Biomechanics, ETH Zürich, Zürich, Switzerland
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141
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Interaction of the CdSe quantum dots with plant cell walls. Colloids Surf B Biointerfaces 2012; 91:41-7. [DOI: 10.1016/j.colsurfb.2011.10.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 10/17/2011] [Accepted: 10/18/2011] [Indexed: 11/22/2022]
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142
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Roh-Johnson M, Shemer G, Higgins CD, McClellan JH, Werts AD, Tulu US, Gao L, Betzig E, Kiehart DP, Goldstein B. Triggering a cell shape change by exploiting preexisting actomyosin contractions. Science 2012; 335:1232-5. [PMID: 22323741 DOI: 10.1126/science.1217869] [Citation(s) in RCA: 195] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Apical constriction changes cell shapes, driving critical morphogenetic events, including gastrulation in diverse organisms and neural tube closure in vertebrates. Apical constriction is thought to be triggered by contraction of apical actomyosin networks. We found that apical actomyosin contractions began before cell shape changes in both Caenorhabitis elegans and Drosophila. In C. elegans, actomyosin networks were initially dynamic, contracting and generating cortical tension without substantial shrinking of apical surfaces. Apical cell-cell contact zones and actomyosin only later moved increasingly in concert, with no detectable change in actomyosin dynamics or cortical tension. Thus, apical constriction appears to be triggered not by a change in cortical tension, but by dynamic linking of apical cell-cell contact zones to an already contractile apical cortex.
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Affiliation(s)
- Minna Roh-Johnson
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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143
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Minami SS, Sun B, Popat K, Kauppinen T, Pleiss M, Zhou Y, Ward ME, Floreancig P, Mucke L, Desai T, Gan L. Selective targeting of microglia by quantum dots. J Neuroinflammation 2012; 9:22. [PMID: 22272874 PMCID: PMC3292839 DOI: 10.1186/1742-2094-9-22] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Accepted: 01/24/2012] [Indexed: 11/10/2022] Open
Abstract
Background Microglia, the resident immune cells of the brain, have been implicated in brain injury and various neurological disorders. However, their precise roles in different pathophysiological situations remain enigmatic and may range from detrimental to protective. Targeting the delivery of biologically active compounds to microglia could help elucidate these roles and facilitate the therapeutic modulation of microglial functions in neurological diseases. Methods Here we employ primary cell cultures and stereotaxic injections into mouse brain to investigate the cell type specific localization of semiconductor quantum dots (QDs) in vitro and in vivo. Two potential receptors for QDs are identified using pharmacological inhibitors and neutralizing antibodies. Results In mixed primary cortical cultures, QDs were selectively taken up by microglia; this uptake was decreased by inhibitors of clathrin-dependent endocytosis, implicating the endosomal pathway as the major route of entry for QDs into microglia. Furthermore, inhibiting mannose receptors and macrophage scavenger receptors blocked the uptake of QDs by microglia, indicating that QD uptake occurs through microglia-specific receptor endocytosis. When injected into the brain, QDs were taken up primarily by microglia and with high efficiency. In primary cortical cultures, QDs conjugated to the toxin saporin depleted microglia in mixed primary cortical cultures, protecting neurons in these cultures against amyloid beta-induced neurotoxicity. Conclusions These findings demonstrate that QDs can be used to specifically label and modulate microglia in primary cortical cultures and in brain and may allow for the selective delivery of therapeutic agents to these cells.
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Affiliation(s)
- S Sakura Minami
- Gladstone Institute of Neurological Disease, 1650 Owens St., San Francisco, CA 94158, USA
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144
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High-resolution whole-mount in situ hybridization using Quantum Dot nanocrystals. J Biomed Biotechnol 2012; 2012:627602. [PMID: 22287835 PMCID: PMC3263632 DOI: 10.1155/2012/627602] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 09/29/2011] [Accepted: 10/03/2011] [Indexed: 11/23/2022] Open
Abstract
The photostability and narrow emission spectra of nanometer-scale semiconductor crystallites (QDs) make them desirable candidates for whole-mount fluorescent in situ hybridization to detect mRNA transcripts in morphologically preserved intact embryos. We describe a method for direct QD labeling of modified oligonucleotide probes through streptavidin-biotin and antibody-mediated interactions (anti-FITC and anti-digoxigenin). To overcome permeability issues and allow QD conjugate penetration, embryos were treated with proteinase K. The use of QDs dramatically increased sensitivity of whole-mount in situ hybridization (WISH) in comparison with organic fluorophores and enabled fluorescent detection of specific transcripts within cells without the use of enzymatic amplification. Therefore, this method offers significant advantages both in terms of sensitivity, as well as resolution. Specifically, the use of QDs alleviates issues of photostability and limited brightness plaguing organic fluorophores and allows fluorescent imaging of cleared embryos. It also offers new imaging possibilities, including intracellular localization of mRNAs, simultaneous multiple-transcript detection, and visualization of mRNA expression patterns in 3D.
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145
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Chen H, Ling B, Yuan F, Zhou C, Chen J, Wang L. Chemiluminescence behaviour of CdTe-potassium permanganate enhanced by sodium hexametaphosphate and sensitized sensing ofl-ascorbic acid. LUMINESCENCE 2012; 27:466-72. [DOI: 10.1002/bio.1376] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 10/17/2011] [Accepted: 10/18/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Hongqi Chen
- Anhui Key Laboratory of Chemo-Biosensing; College of Chemistry and Materials Science, Anhui Normal University; Wuhu 241000; People's Republic of China
| | - Bo Ling
- Anhui Key Laboratory of Chemo-Biosensing; College of Chemistry and Materials Science, Anhui Normal University; Wuhu 241000; People's Republic of China
| | - Fei Yuan
- Anhui Key Laboratory of Chemo-Biosensing; College of Chemistry and Materials Science, Anhui Normal University; Wuhu 241000; People's Republic of China
| | - Cailing Zhou
- Anhui Key Laboratory of Chemo-Biosensing; College of Chemistry and Materials Science, Anhui Normal University; Wuhu 241000; People's Republic of China
| | - Jingguo Chen
- Anhui Key Laboratory of Chemo-Biosensing; College of Chemistry and Materials Science, Anhui Normal University; Wuhu 241000; People's Republic of China
| | - Lun Wang
- Anhui Key Laboratory of Chemo-Biosensing; College of Chemistry and Materials Science, Anhui Normal University; Wuhu 241000; People's Republic of China
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146
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Kumar V, Kumari A, Guleria P, Yadav SK. Evaluating the toxicity of selected types of nanochemicals. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2012; 215:39-121. [PMID: 22057930 DOI: 10.1007/978-1-4614-1463-6_2] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nanotechnology is a fast growing field that provides for the development of materials that have new dimensions, novel properties, and a broader array of applications. Various scientific groups are keen about this technology and are devoting themselves to the development of more, new, and better nanomaterials. In the near future, expectations are that no field will be left untouched by the magical benefits available through application of nanotechnology. Presently, there is only limited knowledge concerning the toxicological effects of NPs. However, it is now known that the toxic behavior of NPs differ from their bulk counterparts. Even NPs that have the same chemical composition differ in their toxicological properties; the differences in toxicity depend upon size, shape, and surface covering. Hence, before NPs are commercially used it is most important that they be subjected to appropriate toxicity evaluation. Among the parameters of NPs that must be evaluated for their effect on toxicity are surface charges, types of coating material, and reactivity of NPs. In this article, we have reviewed the literature pertinent to the toxicity of metal oxide NPs, metallic NPs, quantum dots (QDs), silica (SiO2) NPs, carbon nanotubes (CNTs), and certain other carbon nanomaterials (NMs). These NPs have already found a wide range of applications around the world. In vitro and in vivo studies on NPs have revealed that most are toxic to animals. However, their toxic behavior varies with their size, shape, surface charge, type of coating material and reactivity. Dose, route of administration, and exposure are critical factors that affect the degree of toxicity produced by any particular type of NP. It is for this reason that we believe a careful and rigorous toxicity testing is necessary before any NP is declared to be safe for broad use. We also believe that an agreed upon testing system is needed that can be used to suitably, accurately, and economically assess the toxicity of NPs. NPs have produced an array of different toxic effects in many different types of in vivo and in vitro studies. The types of effects that NPs have produced are those on the pulmonary, cardiac, reproductive, renal and cutaneous systems, as well as on various cell lines. After exposures, significant accumulations of NPs have been found in the lungs, brain, liver, spleen, and bones of test species. It has been well established that the degree of toxicity produced by NPs is linked to their surface properties. Soluble NPs are rendered toxic because of their constituents; however, the situation is entirely different for insoluble NPs. Stable metal oxides do not show any toxicity, whereas metallic NPs that have redox potential may be cytotoxic and genotoxic. The available data on NP toxicity is unfortunately limited, and hence, does not allow scientists to yet make a significant quantitative risk assessment of the safety of synthesized NPs. In this review, we have endeavored to illustrate the importance of having and using results from existing nanotoxicological studies and for developing new and more useful future risk assessment systems. Increased efforts of both an individual and collective nature are required to explore the future pros and cons of nanotechnology.
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Affiliation(s)
- Vineet Kumar
- Biotechnology Division, Institute of Himalayan Bioresource Technology, CSIR, Palampur, HP, 176061, India
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147
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Brown E, Van Weering J, Sharp T, Mantell J, Verkade P. Capturing endocytic segregation events with HPF-CLEM. Methods Cell Biol 2012; 111:175-201. [PMID: 22857929 DOI: 10.1016/b978-0-12-416026-2.00010-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We have advocated the use of high-pressure freezing (HPF) in specific types of Correlative Light Electron Microscopy (CLEM) experiments because the intracellular components such as the cytoskeleton and membrane tubules can only be adequately preserved via cryofixation. To allow fast transfer from the light microscope into a cryofixation device, we have developed the Rapid Transfer System (RTS) for the EMPACT2 high-pressure freezer. In this chapter, we will describe how to prepare and perform a CLEM experiment using this device and will highlight the latest changes made to the original system to optimize the workflow.
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Affiliation(s)
- Edward Brown
- Department of Biochemistry, School of Medical Sciences, University of Bristol, University Walk, Bristol, BS8 1TD, UK
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148
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Abstract
Mesenchymal stem cells (MSCs) are multipotent cells with the potential to differentiate into bone, -cartilage, adipose, and muscle cells. Adult derived MSCs are being actively investigated because of their potential to be utilized for therapeutic cell-based transplantation. Methods to track MSCs in vivo are -limited, preventing long-term functional studies of transplanted cells. Quantum Dots (QDs) offer an alternative to organic dyes and fluorescent proteins to label and track cells in vitro and in vivo. Nanoparticles are resistant to chemical and metabolic degradation, demonstrating long-term photostability. Here, we describe the technique to label MSCs with QDs and demonstrate intracellular QD distribution in the labeled MSCs with laser scanning confocal fluorescent microscopy.
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149
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Somers RC, Lanning RM, Snee PT, Greytak AB, Jain RK, Bawendi MG, Nocera DG. A Nanocrystal-based Ratiometric pH Sensor for Natural pH Ranges. Chem Sci 2012; 3:2980-2985. [PMID: 26413260 PMCID: PMC4582792 DOI: 10.1039/c2sc20212c] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A ratiometric fluorescent pH sensor based on CdSe/CdZnS nanocrystal quantum dots (NCs) has been designed for biological pH ranges. The construct is formed from the conjugation of a pH dye (SNARF) to NCs coated with a poly(amido amine) (PAMAM) dendrimer. The sensor exhibits a well-resolved ratio response at pH values between 6 and 8 under linear or two-photon excitation, and in the presence of a 4% bovine serum albumin (BSA) solution.
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Affiliation(s)
- Rebecca C. Somers
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139-4307, USA
| | - Ryan M. Lanning
- Edwin L. Steele Laboratory for Tumor Biology, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA 02114, USA
| | | | | | - Rakesh K. Jain
- Edwin L. Steele Laboratory for Tumor Biology, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA 02114, USA
| | - Moungi G. Bawendi
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139-4307, USA
| | - Daniel G. Nocera
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139-4307, USA
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150
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Zhang C, Lin J. Defect-related luminescent materials: synthesis, emission properties and applications. Chem Soc Rev 2012; 41:7938-61. [DOI: 10.1039/c2cs35215j] [Citation(s) in RCA: 224] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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