51
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Wang C, Ouyang J, Wang YY, Ye DK, Xia XH. Sensitive assay of protease activity on a micro/nanofluidics preconcentrator fused with the fluorescence resonance energy transfer detection technique. Anal Chem 2014; 86:3216-21. [PMID: 24568176 DOI: 10.1021/ac500196s] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A fast and sensitive assay of protease activity on a micro/nanofluidics preconcentrator combining with fluorescence resonance energy transfer (FRET) detection technique has been developed in a homogeneous real-time format. First, the functionalized nanoprobes are formed by loading dye labeled protein onto gold nanoparticles (AuNPs), in which, the photoluminescence of donor dye was strongly quenched by AuNPs due to FRET mechanisms. For protease activity assay, the nanoprobes are enriched by a micro/nanofluidics preconcentrator. When the target protease is transported to the enriched nanoprobes, cleavage of protein occurs as a consequence of molecular recognition of enzyme to substrate. The release of cleavage fragments from AuNPs nanoprobes leads to the enhancement of fluorescence and enables the protease activity assay on the micro/nanofluidics chip. As a demonstration, digestion of fluorescein isothiocyanate labeled dog serum albumin (FITC-DSA) by trypsin was used as a model reaction. Because of the highly efficient preconcentration and space confinement effect, significantly increased protein cleavage rate and protease assay sensitivity can be achieved with enhanced enzyme activity. The present micro/nanofluidics platform fused with the FRET detection technique is promising for fast and sensitive bioanalysis such as immunoassay, DNA hybridization, drug discovery, and clinical diagnosis.
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Affiliation(s)
- Chen Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing, 210093, China
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52
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Yeh FY, Tseng IH, Chuang SH, Lin CS. Spacer-enhanced chymotrypsin-activated peptide-functionalized gold nanoparticle probes: a rapid assay for the diagnosis of pancreatitis. RSC Adv 2014. [DOI: 10.1039/c4ra00258j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A spacer-enhanced FITC-labeled peptide self-assembled onto AuNPs was fabricated as a chymotrypsin activated fluorescent AuNP probe and was used for the diagnosis of pancreatitis with fecal specimens.
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Affiliation(s)
- Fang-Yuan Yeh
- Department of Biological Science and Technology
- National Chiao Tung University
- Hsinchu 300, Taiwan
| | - I-Hua Tseng
- Department of Biological Science and Technology
- National Chiao Tung University
- Hsinchu 300, Taiwan
| | - Shu-Hung Chuang
- Department of Biological Science and Technology
- National Chiao Tung University
- Hsinchu 300, Taiwan
- Department of Surgery
- Mackay Memorial Hospital
| | - Chih-Sheng Lin
- Department of Biological Science and Technology
- National Chiao Tung University
- Hsinchu 300, Taiwan
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53
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Si Z, Huang C, Gao X, Li C. pH-responsive near-infrared nanoprobe imaging metastases by sensing acidic microenvironment. RSC Adv 2014. [DOI: 10.1039/c4ra07984a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A pH responsive near-infrared fluorescence nanoprobe was developed and visualized pulmonary metastases in a mouse model with a volume as small as 0.5 mm3 by sensing the acidic tumor microenvironment.
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Affiliation(s)
- Zhan Si
- Key Laboratory of Smart Drug Delivery
- Ministry of Education
- School of Pharmacy
- Fudan University
- Shanghai 201203, China
| | - Cuiyun Huang
- Key Laboratory of Smart Drug Delivery
- Ministry of Education
- School of Pharmacy
- Fudan University
- Shanghai 201203, China
| | - Xihui Gao
- Key Laboratory of Smart Drug Delivery
- Ministry of Education
- School of Pharmacy
- Fudan University
- Shanghai 201203, China
| | - Cong Li
- Key Laboratory of Smart Drug Delivery
- Ministry of Education
- School of Pharmacy
- Fudan University
- Shanghai 201203, China
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54
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Deng D, Zhang D, Li Y, Achilefu S, Gu Y. Gold nanoparticles based molecular beacons for in vitro and in vivo detection of the matriptase expression on tumor. Biosens Bioelectron 2013; 49:216-21. [DOI: 10.1016/j.bios.2013.05.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 05/16/2013] [Accepted: 05/17/2013] [Indexed: 12/12/2022]
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55
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Tang A, Mei B, Wang W, Hu W, Li F, Zhou J, Yang Q, Cui H, Wu M, Liang G. FITC-quencher based caspase 3-activatable nanoprobes for effectively sensing caspase 3 in vitro and in cells. NANOSCALE 2013; 5:8963-8967. [PMID: 23970215 DOI: 10.1039/c3nr03339b] [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
By employing fluorescence resonance energy transfer (FRET) quenching, we rationally designed two new FITC-quencher based nanoprobes for effectively sensing caspase 3 (Casp3) in vitro and in cells. Our nanoprobes hold promise for assessing the chemotherapeutic effect of cancer treatment.
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Affiliation(s)
- Anming Tang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China.
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56
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Li X, Zhu S, Xu B, Ma K, Zhang J, Yang B, Tian W. Self-assembled graphene quantum dots induced by cytochrome c: a novel biosensor for trypsin with remarkable fluorescence enhancement. NANOSCALE 2013; 5:7776-9. [PMID: 23851983 DOI: 10.1039/c3nr00006k] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
On the basis of cytochrome c-induced self-assembled graphene quantum dots, we demonstrate a novel fluorescent biosensor for trypsin with remarkable fluorescence enhancement, as well as high selectivity and sensitivity.
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Affiliation(s)
- Xing Li
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, 130012, PR China
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57
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Gold-nanoparticle-based biosensors for detection of enzyme activity. Trends Pharmacol Sci 2013; 34:497-507. [DOI: 10.1016/j.tips.2013.07.002] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 06/24/2013] [Accepted: 07/01/2013] [Indexed: 11/22/2022]
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58
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Biocompatible Glycol Chitosan-Coated Gold Nanoparticles for Tumor-Targeting CT Imaging. Pharm Res 2013; 31:1418-25. [DOI: 10.1007/s11095-013-1142-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 07/01/2013] [Indexed: 01/08/2023]
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59
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Ji T, Zhao Y, Wang J, Zheng X, Tian Y, Zhao Y, Nie G. Tumor fibroblast specific activation of a hybrid ferritin nanocage-based optical probe for tumor microenvironment imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:2427-2431. [PMID: 23853124 DOI: 10.1002/smll.201300600] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 04/11/2013] [Indexed: 06/02/2023]
Abstract
Ferritin-based FAP-α-responsive fluorescence nanoprobes could be activated immediately as they penetrate the tumor blood vessels and come across the FAP-α molecules on the membrane of CAFs in the tumor microenvironment instead of reaching a certain depth into tumor tissue to interact with tumor cells. This probe may become a promising nanomaterial for highly specific and sensitive tumor imaging through responding to the enzymes in the tumor microenvironment.
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Affiliation(s)
- Tianjiao Ji
- Chinese Academy of Sciences Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, China, Beijing 100190, China
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60
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Yu Y, Cao Q, Zhou M, Cui H. A novel homogeneous label-free aptasensor for 2,4,6-trinitrotoluene detection based on an assembly strategy of electrochemiluminescent graphene oxide with gold nanoparticles and aptamer. Biosens Bioelectron 2013; 43:137-42. [DOI: 10.1016/j.bios.2012.12.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 11/23/2012] [Accepted: 12/09/2012] [Indexed: 11/30/2022]
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61
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Jian JW, Chiu WC, Chang HT, Hsu PH, Huang CC. Fibrinolysis and thrombosis of fibrinogen-modified gold nanoparticles for detection of fibrinolytic-related proteins. Anal Chim Acta 2013; 774:67-72. [DOI: 10.1016/j.aca.2013.02.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Revised: 02/06/2013] [Accepted: 02/13/2013] [Indexed: 11/28/2022]
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62
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Suresh AK, Weng Y, Li Z, Zerda R, Van Haute D, Williams JC, Berlin JM. Matrix metalloproteinase-triggered denuding of engineered gold nanoparticles for selective cell uptake. J Mater Chem B 2013; 1:2341-2349. [DOI: 10.1039/c3tb00435j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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63
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Tsai DH, Shelton MP, DelRio FW, Elzey S, Guha S, Zachariah MR, Hackley VA. Quantifying dithiothreitol displacement of functional ligands from gold nanoparticles. Anal Bioanal Chem 2012; 404:3015-23. [PMID: 23104310 DOI: 10.1007/s00216-012-6418-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 08/30/2012] [Accepted: 09/06/2012] [Indexed: 11/29/2022]
Abstract
Dithiothreitol (DTT)-based displacement is widely utilized for separating ligands from their gold nanoparticle (AuNP) conjugates, a critical step for differentiating and quantifying surface-bound functional ligands and therefore the effective surface density of these species on nanoparticle-based therapeutics and other functional constructs. The underlying assumption is that DTT is smaller and much more reactive toward gold compared with most ligands of interest, and as a result will reactively displace the ligands from surface sites thereby enabling their quantification. In this study, we use complementary dimensional and spectroscopic methods to characterize the efficiency of DTT displacement. Thiolated methoxypolyethylene glycol (SH-PEG) and bovine serum albumin (BSA) were chosen as representative ligands. Results clearly show that (1) DTT does not completely displace bound SH-PEG or BSA from AuNPs, and (2) the displacement efficiency is dependent on the binding affinity between the ligands and the AuNP surface. Additionally, the displacement efficiency for conjugated SH-PEG is moderately dependent on the molecular mass (yielding efficiencies ranging from 60 to 80% measured by ATR-FTIR and ≈90% by ES-DMA), indicating that the displacement efficiency for SH-PEG is predominantly determined by the S-Au bond. BSA is particularly difficult to displace with DTT (i.e., the displacement efficiency is nearly zero) when it is in the so-called normal form. The displacement efficiency for BSA improves to 80% when it undergoes a conformational change to the expanded form through a process of pH change or treatment with a surfactant. An analysis of the three-component system (SH-PEG + BSA + AuNP) indicates that the presence of SH-PEG decreases the displacement efficiency for BSA, whereas the displacement efficiency for SH-PEG is less impacted by the presence of BSA.
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Affiliation(s)
- De-Hao Tsai
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
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64
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Gao X, Tang G, Li Y, Su X. A novel optical nanoprobe for trypsin detection and inhibitor screening based on Mn-doped ZnSe quantum dots. Anal Chim Acta 2012; 743:131-6. [DOI: 10.1016/j.aca.2012.07.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Revised: 06/23/2012] [Accepted: 07/06/2012] [Indexed: 11/17/2022]
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65
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Vecchio G, Galeone A, Brunetti V, Maiorano G, Sabella S, Cingolani R, Pompa PP. Concentration-dependent, size-independent toxicity of citrate capped AuNPs in Drosophila melanogaster. PLoS One 2012; 7:e29980. [PMID: 22238688 PMCID: PMC3251612 DOI: 10.1371/journal.pone.0029980] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Accepted: 12/08/2011] [Indexed: 02/06/2023] Open
Abstract
The expected potential benefits promised by nanotechnology in various fields have led to a rapid increase of the presence of engineered nanomaterials in a high number of commercial goods. This is generating increasing questions about possible risks for human health and environment, due to the lack of an in-depth assessment of the physical/chemical factors responsible for their toxic effects. In this work, we evaluated the toxicity of monodisperse citrate-capped gold nanoparticles (AuNPs) of different sizes (5, 15, 40, and 80 nm) in the model organism Drosophila melanogaster, upon ingestion. To properly evaluate and distinguish the possible dose- and/or size-dependent toxicity of the AuNPs, we performed a thorough assessment of their biological effects, using two different dose-metrics. In the first approach, we kept constant the total surface area of the differently sized AuNPs (Total Exposed Surface area approach, TES), while, in the second approach, we used the same number concentration of the four different sizes of AuNPs (Total Number of Nanoparticles approach, TNN). We observed a significant AuNPs-induced toxicity in vivo, namely a strong reduction of Drosophila lifespan and fertility performance, presence of DNA fragmentation, as well as a significant modification in the expression levels of genes involved in stress responses, DNA damage recognition and apoptosis pathway. Interestingly, we found that, within the investigated experimental conditions, the toxic effects in the exposed organisms were directly related to the concentration of the AuNPs administered, irrespective of their size.
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Affiliation(s)
- Giuseppe Vecchio
- Italian Institute of Technology, Center for Bio-Molecular , Arnesano (Lecce), ItalyNanotechnologies@UniLe
- * E-mail: (PPP); (GV)
| | - Antonio Galeone
- Italian Institute of Technology, Center for Bio-Molecular , Arnesano (Lecce), ItalyNanotechnologies@UniLe
| | - Virgilio Brunetti
- Italian Institute of Technology, Center for Bio-Molecular , Arnesano (Lecce), ItalyNanotechnologies@UniLe
| | - Gabriele Maiorano
- Italian Institute of Technology, Center for Bio-Molecular , Arnesano (Lecce), ItalyNanotechnologies@UniLe
| | - Stefania Sabella
- Italian Institute of Technology, Center for Bio-Molecular , Arnesano (Lecce), ItalyNanotechnologies@UniLe
| | - Roberto Cingolani
- Italian Institute of Technology, Central Research Laboratories, Genova, Italy
| | - Pier Paolo Pompa
- Italian Institute of Technology, Center for Bio-Molecular , Arnesano (Lecce), ItalyNanotechnologies@UniLe
- * E-mail: (PPP); (GV)
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66
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Feng T, Feng D, Shi W, Li X, Ma H. A graphene oxide-peptide fluorescence sensor for proteolytically active prostate-specific antigen. MOLECULAR BIOSYSTEMS 2012; 8:1441-5. [DOI: 10.1039/c2mb05379a] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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67
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Park K, Jeong J, Chung BH. Cascade imaging of proteolytic pathways in cancer cells using fluorescent protein-conjugated gold nanoquenchers. Chem Commun (Camb) 2012; 48:10547-9. [DOI: 10.1039/c2cc35687b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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68
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Tokonami S, Yamamoto Y, Shiigi H, Nagaoka T. Synthesis and bioanalytical applications of specific-shaped metallic nanostructures: a review. Anal Chim Acta 2011; 716:76-91. [PMID: 22284881 DOI: 10.1016/j.aca.2011.12.025] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 12/05/2011] [Accepted: 12/14/2011] [Indexed: 02/03/2023]
Abstract
Many successful synthesis routes for producing different shapes of metallic nanostructures, including sphere, rod, cube, and hollow shapes, have been developed in the past few decades. Many applications using these nanostructures have been studied because the outstanding properties of the nanostructures are not exhibited by their bulk-state counterparts. This review paper reports some recent developments in clinical and biosensor applications. The first part focused on the synthesis methods of metallic nanostructures having various shapes along with their optical properties. The second and third part is an introduction of the gold nanoparticle assemblies and arrays, explaining the conjugation methods of metallic nanostructures with biological entities. The final part reviews on the recent bioanalytical applications using various shapes of metallic nanostructures.
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Affiliation(s)
- Shiho Tokonami
- Nanoscience and Nanotechnology Research Center, Research Organization for the 21st Century, Osaka Prefecture University, Sakai, Osaka, Japan
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69
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Sharifi S, Behzadi S, Laurent S, Forrest ML, Stroeve P, Mahmoudi M. Toxicity of nanomaterials. Chem Soc Rev 2011; 41:2323-43. [PMID: 22170510 DOI: 10.1039/c1cs15188f] [Citation(s) in RCA: 814] [Impact Index Per Article: 62.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Nanoscience has matured significantly during the last decade as it has transitioned from bench top science to applied technology. Presently, nanomaterials are used in a wide variety of commercial products such as electronic components, sports equipment, sun creams and biomedical applications. There are few studies of the long-term consequences of nanoparticles on human health, but governmental agencies, including the United States National Institute for Occupational Safety and Health and Japan's Ministry of Health, have recently raised the question of whether seemingly innocuous materials such as carbon-based nanotubes should be treated with the same caution afforded known carcinogens such as asbestos. Since nanomaterials are increasing a part of everyday consumer products, manufacturing processes, and medical products, it is imperative that both workers and end-users be protected from inhalation of potentially toxic NPs. It also suggests that NPs may need to be sequestered into products so that the NPs are not released into the atmosphere during the product's life or during recycling. Further, non-inhalation routes of NP absorption, including dermal and medical injectables, must be studied in order to understand possible toxic effects. Fewer studies to date have addressed whether the body can eventually eliminate nanomaterials to prevent particle build-up in tissues or organs. This critical review discusses the biophysicochemical properties of various nanomaterials with emphasis on currently available toxicology data and methodologies for evaluating nanoparticle toxicity (286 references).
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Affiliation(s)
- Shahriar Sharifi
- Department of Biomedical Engineering, University Medical Center Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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70
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Manju S, Sreenivasan K. Detection of glucose in synthetic tear fluid using dually functionalized gold nanoparticles. Talanta 2011; 85:2643-9. [PMID: 21962696 DOI: 10.1016/j.talanta.2011.08.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2011] [Revised: 08/16/2011] [Accepted: 08/16/2011] [Indexed: 01/24/2023]
Abstract
A simple fluorescent sensing of glucose in aqueous fluids (e.g. tear fluid) using dually functionalized gold nanoparticles is presented. As a first step gold nanoparticles (AuNPs) were synthesized using oxidised dextran which acted both as reducing and stabilizing agent. Aminophenyl boronic acid was conjugated onto AuNPs by Schiff's base formation and the formed Schiff's base was stabilized by sodium borohydride reduction. Rhodamine B isothiocyanate (RBITC) was then assembled onto the modified AuNPs. The fluorescence of RBITC was nearly quenched and found to be revived when glucose was added. It is reasoned that the glucose binding induces restructuring of the surface assembly resulting in an overall increase in the size and thereby enhancing the distance between the gold core and fluorophore. TEM image and size measurements using dynamic light scattering (DLS) in fact, reflected this possibility. The increase in fluorescence was proportional with the concentration of glucose enabling quantitative detection. A good linearity was observed between the fluorescence intensity and glucose concentration in a range of 0.025-0.125 μM with detection limit of 0.005 ± 0.002 μM. The potential of the method was demonstrated by measuring glucose in real tear fluids collected from volunteers. The method is extremely sensitive and can be employed to measure low concentration of glucose in aqueous fluids such as tear.
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Affiliation(s)
- S Manju
- Biomedical Technology Wing, Sre Chitra Tirunal Institute for Medical Sciences & Technology, Poojapura, Trivandrum 695012, India
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71
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Abstract
OBJECTIVE A theranostic system integrates some form of diagnostic testing to determine the presence of a molecular target for which a specific drug is intended. Molecular imaging serves this diagnostic function and provides powerful means for noninvasively detecting disease. We briefly review the paradigms rooted in nuclear medicine and highlight recent advances in this field. We also explore how nanometer-sized complexes, called nanomedicines, present an excellent theranostic platform applicable to both drug discovery and clinical use. CONCLUSION For imagers, molecular theranostics represents a powerful emerging platform that intimately couples targeted therapeatic entities with noninvasive imaging that yields information on the presence of defined molecular targets before, during, and after cognate therapy.
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Affiliation(s)
- Daniel Y Lee
- Department of Radiology, Nuclear Medicine Division, The Methodist Hospital Research Institute, 6565 Fannin St, MB1-066, Houston, TX 77030, USA.
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72
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Lee H, Akers W, Bhushan K, Bloch S, Sudlow G, Tang R, Achilefu S. Near-infrared pH-activatable fluorescent probes for imaging primary and metastatic breast tumors. Bioconjug Chem 2011; 22:777-84. [PMID: 21388195 DOI: 10.1021/bc100584d] [Citation(s) in RCA: 166] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Highly tumor selective near-infrared (NIR) pH-activatable probe was developed by conjugating pH-sensitive cyanine dye to a cyclic arginine-glycine-aspartic acid (cRGD) peptide targeting α(v)β(3) integrin (ABIR), a protein that is highly overexpressed in endothelial cells during tumor angiogenesis. The NIR pH-sensitive dye used to construct the probe exhibits high spectral sensitivity with pH changes. It has negligible fluorescence above pH 6 but becomes highly fluorescent below pH 5, with a pK(a) of 4.7. This probe is ideal for imaging acidic cell organelles such as tumor lysosomes or late endosomes. Cell microscopy data demonstrate that binding of the cRGD probe to ABIR facilitated the endocytosis-mediated lysosomal accumulation and subsequent fluorescence enhancement of the NIR pH-activatable dye in tumor cells (MDA-MB-435 and 4T1/luc). A similar fluorescence enhancement mechanism was observed in vivo, where the tumors were evident within 4 h post injection. Moreover, lung metastases were also visualized in an orthotopic tumor mouse model using this probe, which was further confirmed by histologic analysis. These results demonstrate the potential of using the new integrin-targeted pH-sensitive probe for the detection of primary and metastatic cancer.
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Affiliation(s)
- Hyeran Lee
- Department of Radiology, Washington University , St. Louis, Missouri 63110, United States
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73
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Li J, Lu CH, Yao QH, Zhang XL, Liu JJ, Yang HH, Chen GN. A graphene oxide platform for energy transfer-based detection of protease activity. Biosens Bioelectron 2011; 26:3894-9. [PMID: 21458253 DOI: 10.1016/j.bios.2011.03.003] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 02/25/2011] [Accepted: 03/02/2011] [Indexed: 12/12/2022]
Abstract
In this article, we report the first graphene oxide (GO)-based platform to detect protease activity in a homogeneous real-time format. In designing such GO-based biosensing platform, we put a protease substrate peptide as the linker between the energy transfer donor (QDs) and the energy transfer acceptor (GO) to fabricate the GO-peptide-QDs nanoprobes. In the nanoprobes, the photoluminescence (PL) of donor QDs was strongly quenched due to the presence of GO in close proximity. The protease activity caused modulation in the efficiency of the energy transfer between the acceptor and donor, thus enabling the protease assay. The proposed GO-based platform is easy to assemble and has little background interference, yet still give superior sensitivity and rapid response. Furthermore, this GO-QDs architecture can serve as a universal platform by simply changing the types of peptide sequences for the different proteases. In this work, GO-based platform has been successfully applied in the sensitive detection of matrix metalloproteinase (MMP) and thrombin activity. Meanwhile, we also utilized this platform to monitor the protease inhibitor. The proposed GO-based platform is anticipated to find applications in the diagnosis of protease-related diseases and screening of potential drugs with high sensitivity in a high-throughput way.
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Affiliation(s)
- Juan Li
- The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, PR China
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74
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Xue W, Zhang G, Zhang D. A sensitive colorimetric label-free assay for trypsin and inhibitor screening with gold nanoparticles. Analyst 2011; 136:3136-41. [DOI: 10.1039/c1an15224f] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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75
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Gabriel D, Zuluaga MF, Lange N. On the cutting edge: protease-sensitive prodrugs for the delivery of photoactive compounds. Photochem Photobiol Sci 2011; 10:689-703. [DOI: 10.1039/c0pp00341g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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76
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Bagaria HG, Wong MS. Polyamine–salt aggregate assembly of capsules as responsive drug delivery vehicles. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10712g] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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77
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Abstract
Recent advances in nanotechnology have offered new hope for cancer detection, prevention, and treatment. While the enhanced permeability and retention effect has served as a key rationale for using nanoparticles to treat solid tumors, it does not enable uniform delivery of these particles to all regions of tumors in sufficient quantities. This heterogeneous distribution of therapeutics is a result of physiological barriers presented by the abnormal tumor vasculature and interstitial matrix. These barriers are likely to be responsible for the modest survival benefit offered by many FDA-approved nanotherapeutics and must be overcome for the promise of nanomedicine in patients to be realized. Here, we review these barriers to the delivery of cancer therapeutics and summarize strategies that have been developed to overcome these barriers. Finally, we discuss design considerations for optimizing the delivery of nanoparticles to tumors.
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Affiliation(s)
- Rakesh K Jain
- Edwin L. Steele Laboratory, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom Street, Boston, MA 02114, USA.
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Hutter E, Maysinger D. Gold nanoparticles and quantum dots for bioimaging. Microsc Res Tech 2010; 74:592-604. [DOI: 10.1002/jemt.20928] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Accepted: 07/26/2010] [Indexed: 12/21/2022]
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Wang Y, Seebald JL, Szeto DP, Irudayaraj J. Biocompatibility and biodistribution of surface-enhanced Raman scattering nanoprobes in zebrafish embryos: in vivo and multiplex imaging. ACS NANO 2010; 4:4039-53. [PMID: 20552995 DOI: 10.1021/nn100351h] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Nanoparticles are increasingly being used to investigate biological processes in various animal models due to their versatile chemical, unique optical, and multifunctional properties. In this report we address the biocompatibility and biodistribution of nanoparticle sensors used for Raman chemical imaging in live zebrafish (Danio rerio) embryos. Surface-enhanced Raman scattering (SERS) nanoprobes (NPs) comprising gold nanoparticles (AuNPs) as enhancing substrate and nonfluorescent Raman labels were synthesized and microinjected into zebrafish embryos at the one-cell stage. Raman mapping was performed to assess their distribution in various cell-types and tissues of developing embryo at five different stages between 6 and 96 hpf (hours post-fertilization). Biocompatibility and toxicity studies indicate that the NPs are not toxic and the embryos were found to exhibit normal morphological and gene expression in addition to the proper form and function of major organs such as the heart and vasculature (of 7 day old NPs injected zebrafish embryos). A multiplex in vivo detection protocol was developed by SERS imaging to demonstrate that multiple labels can be detected by Raman mapping in undifferentiated cells as they develop into distinct cell- and tissue-types. The present work is the first to report on multiplex Raman imaging of zebrafish embryos with potential implications in tracking tissue development and biological processes at single molecule sensitivity using appropriate target molecules in vivo.
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Affiliation(s)
- Yuling Wang
- Bindley Biosciences Center, Purdue University, West Lafayette, IN 47907, USA
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