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Significance of Capping Agents of Colloidal Nanoparticles from the Perspective of Drug and Gene Delivery, Bioimaging, and Biosensing: An Insight. Int J Mol Sci 2022; 23:ijms231810521. [PMID: 36142435 PMCID: PMC9505579 DOI: 10.3390/ijms231810521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/01/2022] [Accepted: 09/07/2022] [Indexed: 11/19/2022] Open
Abstract
The over-growth and coagulation of nanoparticles is prevented using capping agents by the production of stearic effect that plays a pivotal role in stabilizing the interface. This strategy of coating the nanoparticles’ surface with capping agents is an emerging trend in assembling multipurpose nanoparticles that is beneficial for improving their physicochemical and biological behavior. The enhancement of reactivity and negligible toxicity is the outcome. In this review article, an attempt has been made to introduce the significance of different capping agents in the preparation of nanoparticles. Most importantly, we have highlighted the recent progress, existing roadblocks, and upcoming opportunities of using surface modified nanoparticles in nanomedicine from the drug and gene delivery, bioimaging, and biosensing perspectives.
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Neubert F, Beliu G, Terpitz U, Werner C, Geis C, Sauer M, Doose S. Bioorthogonal Click Chemistry Enables Site-specific Fluorescence Labeling of Functional NMDA Receptors for Super-Resolution Imaging. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808951] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Franziska Neubert
- Department of Biotechnology and Biophysics; University of Würzburg; Biocenter; Am Hubland 97074 Würzburg Germany
| | - Gerti Beliu
- Department of Biotechnology and Biophysics; University of Würzburg; Biocenter; Am Hubland 97074 Würzburg Germany
| | - Ulrich Terpitz
- Department of Biotechnology and Biophysics; University of Würzburg; Biocenter; Am Hubland 97074 Würzburg Germany
| | - Christian Werner
- Department of Biotechnology and Biophysics; University of Würzburg; Biocenter; Am Hubland 97074 Würzburg Germany
| | - Christian Geis
- Hans-Berger Department of Neurology; Center for Sepsis Control and Care (CSCC); Jena University Hospital; Am Klinikum 1 07747 Jena Germany
| | - Markus Sauer
- Department of Biotechnology and Biophysics; University of Würzburg; Biocenter; Am Hubland 97074 Würzburg Germany
| | - Sören Doose
- Department of Biotechnology and Biophysics; University of Würzburg; Biocenter; Am Hubland 97074 Würzburg Germany
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Neubert F, Beliu G, Terpitz U, Werner C, Geis C, Sauer M, Doose S. Bioorthogonal Click Chemistry Enables Site-specific Fluorescence Labeling of Functional NMDA Receptors for Super-Resolution Imaging. Angew Chem Int Ed Engl 2018; 57:16364-16369. [PMID: 30347512 DOI: 10.1002/anie.201808951] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/15/2018] [Indexed: 12/20/2022]
Abstract
Super-resolution microscopy requires small fluorescent labels. We report the application of genetic code expansion in combination with bioorthogonal click chemistry to label the NR1 domain of the NMDA receptor. We generated NR1 mutants incorporating an unnatural amino acid at various positions in order to attach small organic fluorophores such as Cy5-tetrazine site-specifically to the extracellular domain of the receptor. Mutants were optimized with regard to protein expression, labeling efficiency and receptor functionality as tested by fluorescence microscopy and whole-cell patch clamp. The results show that bioorthogonal click chemistry in combination with small organic dyes is superior to available immunocytochemistry protocols for receptor labeling in live and fixed cells and enables single-molecule sensitive super-resolution microscopy experiments.
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Affiliation(s)
- Franziska Neubert
- Department of Biotechnology and Biophysics, University of Würzburg, Biocenter, Am Hubland, 97074, Würzburg, Germany
| | - Gerti Beliu
- Department of Biotechnology and Biophysics, University of Würzburg, Biocenter, Am Hubland, 97074, Würzburg, Germany
| | - Ulrich Terpitz
- Department of Biotechnology and Biophysics, University of Würzburg, Biocenter, Am Hubland, 97074, Würzburg, Germany
| | - Christian Werner
- Department of Biotechnology and Biophysics, University of Würzburg, Biocenter, Am Hubland, 97074, Würzburg, Germany
| | - Christian Geis
- Hans-Berger Department of Neurology, Center for Sepsis Control and Care (CSCC), Jena University Hospital, Am Klinikum 1, 07747, Jena, Germany
| | - Markus Sauer
- Department of Biotechnology and Biophysics, University of Würzburg, Biocenter, Am Hubland, 97074, Würzburg, Germany
| | - Sören Doose
- Department of Biotechnology and Biophysics, University of Würzburg, Biocenter, Am Hubland, 97074, Würzburg, Germany
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Krishnamurthy VV, Zhang K. Chemical physics in living cells — Using light to visualize and control intracellular signal transduction. CHINESE J CHEM PHYS 2018. [DOI: 10.1063/1674-0068/31/cjcp1806152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Vishnu V. Krishnamurthy
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Kai Zhang
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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Kumar A, Tan A, Wong J, Spagnoli JC, Lam J, Blevins BD, G N, Thorne L, Ashkan K, Xie J, Liu H. Nanotechnology for Neuroscience: Promising Approaches for Diagnostics, Therapeutics and Brain Activity Mapping. ADVANCED FUNCTIONAL MATERIALS 2017; 27:1700489. [PMID: 30853878 PMCID: PMC6404766 DOI: 10.1002/adfm.201700489] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Unlocking the secrets of the brain is a task fraught with complexity and challenge - not least due to the intricacy of the circuits involved. With advancements in the scale and precision of scientific technologies, we are increasingly equipped to explore how these components interact to produce a vast range of outputs that constitute function and disease. Here, an insight is offered into key areas in which the marriage of neuroscience and nanotechnology has revolutionized the industry. The evolution of ever more sophisticated nanomaterials culminates in network-operant functionalized agents. In turn, these materials contribute to novel diagnostic and therapeutic strategies, including drug delivery, neuroprotection, neural regeneration, neuroimaging and neurosurgery. Further, the entrance of nanotechnology into future research arenas including optogenetics, molecular/ion sensing and monitoring, and piezoelectric effects is discussed. Finally, considerations in nanoneurotoxicity, the main barrier to clinical translation, are reviewed, and direction for future perspectives is provided.
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Affiliation(s)
- Anil Kumar
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Aaron Tan
- UCL Medical School, University College London (UCL), London, United Kingdom
| | - Joanna Wong
- Imperial College School of Medicine, Imperial College London,London, United Kingdom
| | - Jonathan Clayton Spagnoli
- Department of Chemistry, Bio-Imaging Research Center, University of Georgia, Athens, Georgia 30602, United States
| | - James Lam
- UCL Medical School, University College London (UCL), London, United Kingdom
| | - Brianna Diane Blevins
- Department of Chemistry, Bio-Imaging Research Center, University of Georgia, Athens, Georgia 30602, United States
| | - Natasha G
- UCL Medical School, University College London (UCL), London, United Kingdom
| | - Lewis Thorne
- Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom
| | - Keyoumars Ashkan
- Department of Neurosurgery, King's College Hospital NHS Foundation Trust, King's College London, London, United Kingdom
| | - Jin Xie
- Department of Chemistry, Bio-Imaging Research Center, University of Georgia, Athens, Georgia 30602, United States
| | - Hong Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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A homogeneous and "off-on" fluorescence aptamer-based assay for chloramphenicol using vesicle quantum dot-gold colloid composite probes. Anal Chim Acta 2016; 929:49-55. [PMID: 27251948 DOI: 10.1016/j.aca.2016.04.060] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 04/26/2016] [Accepted: 04/30/2016] [Indexed: 11/21/2022]
Abstract
In this work, a novel homogeneous and signal "off-on" aptamer based fluorescence assay was successfully developed to detect chloramphenicol (CAP) residues in food based on the fluorescence resonance energy transfer (FRET). The vesicle nanotracer was prepared through labeling single stranded DNA binding protein (SSB) on limposome-CdSe/ZnS quantum dot (SSB/L-QD) complexes. It was worth mentioning that the signal tracer (SSB/L-QD) with vesicle shape, which was fabricated being encapsulated with a number of quantum dots and SSB. The nanotracer has excellent signal amplification effects. The vesicle composite probe was formed by combining aptamer labeled nano-gold (Au-Apt) and SSB/L-QD. Which based on SSB's specific affinity towards aptamer. This probe can't emit fluoresce which is in "off" state because the signal from SSB/L-QD as donor can be quenched by the Au-aptas acceptor. When CAP was added in the composite probe solution, the aptamer on the Au-Apt can be preferentially bounded with CAP then release from the composite probe, which can turn the "off" signal of SSB/L-QD tracer into "on" state. The assay indicates excellent linear response to CAP from 0.001 nM to 10 nM and detection limit down to 0.3 pM. The vesicle probes with size of 88 nm have strong signal amplification. Because a larger number of QDs can be labeled inside the double phosphorus lipid membrane. Besides, it was employed to detect CAP residues in the milk samples with results being agreed well with those from ELISA, verifying its accuracy and reliability.
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Yamashita SI, Hamada M, Nakanishi S, Saito H, Nosaka Y, Wakida SI, Biju V. Auger Ionization Beats Photo-Oxidation of Semiconductor Quantum Dots: Extended Stability of Single-Molecule Photoluminescence. Angew Chem Int Ed Engl 2015; 54:3892-6. [DOI: 10.1002/anie.201501131] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Indexed: 12/31/2022]
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Yamashita SI, Hamada M, Nakanishi S, Saito H, Nosaka Y, Wakida SI, Biju V. Auger Ionization Beats Photo-Oxidation of Semiconductor Quantum Dots: Extended Stability of Single-Molecule Photoluminescence. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501131] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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