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Wilson BAP, Thornburg CC, Henrich CJ, Grkovic T, O'Keefe BR. Creating and screening natural product libraries. Nat Prod Rep 2020; 37:893-918. [PMID: 32186299 PMCID: PMC8494140 DOI: 10.1039/c9np00068b] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Covering: up to 2020The National Cancer Institute of the United States (NCI) has initiated a Cancer Moonshot program entitled the NCI Program for Natural Product Discovery. As part of this effort, the NCI is producing a library of 1 000 000 partially purified natural product fractions which are being plated into 384-well plates and provided to the research community free of charge. As the first 326 000 of these fractions have now been made available, this review seeks to describe the general methods used to collect organisms, extract those organisms, and create a prefractionated library. Importantly, this review also details both cell-based and cell-free bioassay methods and the adaptations necessary to those methods to productively screen natural product libraries. Finally, this review briefly describes post-screen dereplication and compound purification and scale up procedures which can efficiently identify active compounds and produce sufficient quantities of natural products for further pre-clinical development.
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Affiliation(s)
- Brice A P Wilson
- Molecular Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, USA.
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2
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3
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Göbel G, Talke A, Ahnert U, Lisdat F. Electrochemical Activity Determination of Catechol‐O‐methyl Transferase by Selective Dopamine Detection. ChemElectroChem 2019. [DOI: 10.1002/celc.201900856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gero Göbel
- Biosystems Technology Institute of Life Sciences and Biomedical Technologies Technical University Wildau Germany
| | | | | | - Fred Lisdat
- Biosystems Technology Institute of Life Sciences and Biomedical Technologies Technical University Wildau Germany
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4
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Probing ligand removal and ordering at quantum dot surfaces using vibrational sum frequency generation spectroscopy. J Colloid Interface Sci 2019; 537:389-395. [DOI: 10.1016/j.jcis.2018.11.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/09/2018] [Accepted: 11/06/2018] [Indexed: 01/19/2023]
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5
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Cadmium-containing quantum dots: properties, applications, and toxicity. Appl Microbiol Biotechnol 2017; 101:2713-2733. [PMID: 28251268 DOI: 10.1007/s00253-017-8140-9] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 01/18/2017] [Accepted: 01/20/2017] [Indexed: 01/20/2023]
Abstract
The marriage of biology with nanomaterials has significantly accelerated advancement of biological techniques, profoundly facilitating practical applications in biomedical fields. With unique optical properties (e.g., tunable broad excitation, narrow emission spectra, robust photostability, and high quantum yield), fluorescent quantum dots (QDs) have been reasonably functionalized with controllable interfaces and extensively used as a new class of optical probe in biological researches. In this review, we summarize the recent progress in synthesis and properties of QDs. Moreover, we provide an overview of the outstanding potential of QDs for biomedical research and innovative methods of drug delivery. Specifically, the applications of QDs as novel fluorescent nanomaterials for biomedical sensing and imaging have been detailedly highlighted and discussed. In addition, recent concerns on potential toxicity of QDs are also introduced, ranging from cell researches to animal models.
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6
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Ju H, Arumugam P, Lee J, Song JM. Impact of Environmental Pollutant Cadmium on the Establishment of a Cancer Stem Cell Population in Breast and Hepatic Cancer. ACS OMEGA 2017; 2:563-572. [PMID: 30023612 PMCID: PMC6044754 DOI: 10.1021/acsomega.6b00181] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 02/03/2017] [Indexed: 05/09/2023]
Abstract
Cadmium, a heavy metal pollutant, causes cancer. The existence of cancer stem cells (CSCs) in tumors is widely considered to be the reason for the recurrence and treatment failure of cancer. Increasing evidence has confirmed that under certain conditions non-CSCs could be converted into CSCs. The impact of cadmium on the development of CSC lineage in the bulk tumor cell population is not yet studied. The aim of this study was to evaluate the effect of cadmium on the conversion of non-CSCs to CSCs and the identification of CSCs based on the concurrent monitoring of multiple CSC markers. High-content monitoring of molecular markers was performed using quantum dot (QD) nanoprobes and an acousto-optical tunable filter (AOTF)-based imaging device. Cadmium treatment significantly increased the CSC population in MCF-7 and HepG2 cell lines. The cadmium-induced CSCs were identified by a concurrent analysis of stem-cell markers, namely, CD44, CD24, CD133, and ALDH1. Moreover, increased m-RNA expression of CD44, ALDH1, and CD133 and protein expression of p-Ras, p-Raf-1, p-MEK-1, and p-ERK-1 were observed in the cadmium-treated MCF-7 and HepG2 cells. This study demonstrates that cadmium induces the gene expression of CSC markers in the breast and liver cancer cell lineage and promotes the conversion of non-CSCs to CSCs.
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Affiliation(s)
| | | | - Jungmi Lee
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, South Korea
| | - Joon Myong Song
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, South Korea
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7
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Balmuri SR, Selvaraj U, Kumar VV, Anthony SP, Tsatsakis AM, Golokhvast KS, Raman T. Effect of surfactant in mitigating cadmium oxide nanoparticle toxicity: Implications for mitigating cadmium toxicity in environment. ENVIRONMENTAL RESEARCH 2017; 152:141-149. [PMID: 27771568 DOI: 10.1016/j.envres.2016.10.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/04/2016] [Accepted: 10/09/2016] [Indexed: 06/06/2023]
Abstract
Cadmium (Cd), classified as human carcinogen, is an extremely toxic heavy metal pollutant, and there is an increasing environmental concern for cadmium exposure through anthropogenic sources including cigarette smoke. Though Cd based nanoparticles such as cadmium oxide (CdO) are being widely used in a variety of clinical and industrial applications, the toxicity of CdO nanoparticles has not been well characterized. Herein we report the toxicity of CdO nanoparticles employing zebrafish as a model. Two different CdO nanoparticles were prepared, calcination of Cd(OH)2 without any organic molecule (CdO-1) and calcination of Cd-citrate coordination polymer (CdO-2), to evaluate and compare the toxicity of these two different CdO nanoparticles. Results show that zebrafish exposed to CdO-2 nanoparticles expressed reduced toxicity as judged by lower oxidative stress levels, rescue of liver carboxylesterases and reduction in metallothionein activity compared to CdO-1 nanoparticles. Histopathological observations also support our contention that CdO-1 nanoparticles showed higher toxicity relative to CdO-2 nanoparticles. The organic unit of Cd-citrate coordination polymer might have converted into carbon during calcination that might have covered the surface of CdO nanoparticles. This carbon surface coverage can control the release of Cd2+ ions in CdO-2 compared to non-covered CdO-1 nanoparticles and hence mitigate the toxicity in the case of CdO-2. This was supported by atomic absorption spectrophotometer analyses of Cd2+ ions release from CdO-1 and CdO-2 nanoparticles. Thus the present study clearly demonstrates the toxicity of CdO nanoparticles in an aquatic animal and also indicates that the toxicity could be substantially reduced by carbon coverage. This could have important implications in terms of anthropogenic release and environmental pollution caused by Cd and human exposure to Cd2+ from sources such as cigarette smoke.
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Affiliation(s)
- Sricharani Rao Balmuri
- Department of Bioengineering, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613401, India
| | - Uthra Selvaraj
- Department of Biotechnology, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613401, India
| | - Vadivel Vinod Kumar
- Department of Chemistry, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613401, India
| | - Savarimuthu Philip Anthony
- Department of Chemistry, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613401, India.
| | - Aristides Michael Tsatsakis
- Department of Forensic Sciences and Toxicology, Medical School, University of Crete, Heraklion 71003, Greece; Scientific Educational Center of Nanotechnology, Far Eastern Federal University, Vladivostok 690990, Russian Federation
| | - Kirill Sergeevich Golokhvast
- Scientific Educational Center of Nanotechnology, Far Eastern Federal University, Vladivostok 690990, Russian Federation
| | - Thiagarajan Raman
- Department of Bioengineering, School of Chemical & Biotechnology, SASTRA University, Thanjavur 613401, India; Centre for Research in Infectious Diseases (CRID), School of Chemical & Biotechnology, SASTRA University, Thanjavur 613401, India.
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8
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Roark B, Tan JA, Ivanina A, Chandler M, Castaneda J, Kim HS, Jawahar S, Viard M, Talic S, Wustholz KL, Yingling YG, Jones M, Afonin KA. Fluorescence Blinking as an Output Signal for Biosensing. ACS Sens 2016; 1:1295-1300. [PMID: 30035233 DOI: 10.1021/acssensors.6b00352] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate the first biosensing strategy that relies on quantum dot (QD) fluorescence blinking to report the presence of a target molecule. Unlike other biosensors that utilize QDs, our method does not require the analyte to induce any fluorescence intensity or color changes, making it readily applicable to a wide range of target species. Instead, our approach relies on the understanding that blinking, a single particle phenomenon, is obscured when several QDs lie within the detection volume of a confocal microscope. If QDs are engineered to aggregate when they encounter a particular target molecule, the observation of quasi-continuous emission should indicate its presence. As proof of concept, we programmed DNAs to drive rapid isothermal assembly of QDs in the presence of a target strand (oncogene K-ras). The assemblies, confirmed by various gel techniques, contained multiple QDs and were readily distinguished from free QDs by the absence of blinking.
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Affiliation(s)
- Brandon Roark
- Department
of Chemistry, University of North Carolina at Charlotte, 9201 University
City Boulevard, Charlotte, North Carolina 28223, United States
| | - Jenna A. Tan
- Department
of Chemistry, College of William and Mary, Williamsburg, Virginia 23185, United States
| | - Anna Ivanina
- Department
of Chemistry, University of North Carolina at Charlotte, 9201 University
City Boulevard, Charlotte, North Carolina 28223, United States
| | - Morgan Chandler
- Department
of Chemistry, University of North Carolina at Charlotte, 9201 University
City Boulevard, Charlotte, North Carolina 28223, United States
| | - Jose Castaneda
- Department
of Chemistry, University of North Carolina at Charlotte, 9201 University
City Boulevard, Charlotte, North Carolina 28223, United States
| | - Ho Shin Kim
- Department
of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7907, United States
| | - Shriram Jawahar
- Department
of Chemistry, University of North Carolina at Charlotte, 9201 University
City Boulevard, Charlotte, North Carolina 28223, United States
| | - Mathias Viard
- Basic
Science Program, Leidos Biomedical
Research, Inc., RNA Biology Laboratory, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Strahinja Talic
- Department
of Chemistry, University of North Carolina at Charlotte, 9201 University
City Boulevard, Charlotte, North Carolina 28223, United States
| | - Kristin L. Wustholz
- Department
of Chemistry, College of William and Mary, Williamsburg, Virginia 23185, United States
| | - Yaroslava G. Yingling
- Department
of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7907, United States
| | - Marcus Jones
- Department
of Chemistry, University of North Carolina at Charlotte, 9201 University
City Boulevard, Charlotte, North Carolina 28223, United States
- Nanoscale
Science Program and The Center
for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Kirill A. Afonin
- Department
of Chemistry, University of North Carolina at Charlotte, 9201 University
City Boulevard, Charlotte, North Carolina 28223, United States
- Nanoscale
Science Program and The Center
for Biomedical Engineering and Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
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9
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Waiskopf N, Ben-Shahar Y, Galchenko M, Carmel I, Moshitzky G, Soreq H, Banin U. Photocatalytic Reactive Oxygen Species Formation by Semiconductor-Metal Hybrid Nanoparticles. Toward Light-Induced Modulation of Biological Processes. NANO LETTERS 2016; 16:4266-73. [PMID: 27224678 DOI: 10.1021/acs.nanolett.6b01298] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Semiconductor-metal hybrid nanoparticles manifest efficient light-induced spatial charge separation at the semiconductor-metal interface, as demonstrated by their use for hydrogen generation via water splitting. Here, we pioneer a study of their functionality as efficient photocatalysts for the formation of reactive oxygen species. We observed enhanced photocatalytic activity forming hydrogen peroxide, superoxide, and hydroxyl radicals upon light excitation, which was significantly larger than that of the semiconductor nanocrystals, attributed to the charge separation and the catalytic function of the metal tip. We used this photocatalytic functionality for modulating the enzymatic activity of horseradish peroxidase as a model system, demonstrating the potential use of hybrid nanoparticles as active agents for controlling biological processes through illumination. The capability to produce reactive oxygen species by illumination on-demand enhances the available peroxidase-based tools for research and opens the path for studying biological processes at high spatiotemporal resolution, laying the foundation for developing novel therapeutic approaches.
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Affiliation(s)
- Nir Waiskopf
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology ‡Department of Biological Chemistry and the Edmond and Lily Safra Center of Brain Science, The Hebrew University of Jerusalem , Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Yuval Ben-Shahar
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology ‡Department of Biological Chemistry and the Edmond and Lily Safra Center of Brain Science, The Hebrew University of Jerusalem , Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Michael Galchenko
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology ‡Department of Biological Chemistry and the Edmond and Lily Safra Center of Brain Science, The Hebrew University of Jerusalem , Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Inbal Carmel
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology ‡Department of Biological Chemistry and the Edmond and Lily Safra Center of Brain Science, The Hebrew University of Jerusalem , Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Gilli Moshitzky
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology ‡Department of Biological Chemistry and the Edmond and Lily Safra Center of Brain Science, The Hebrew University of Jerusalem , Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Hermona Soreq
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology ‡Department of Biological Chemistry and the Edmond and Lily Safra Center of Brain Science, The Hebrew University of Jerusalem , Safra Campus, Givat Ram, Jerusalem 91904, Israel
| | - Uri Banin
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology ‡Department of Biological Chemistry and the Edmond and Lily Safra Center of Brain Science, The Hebrew University of Jerusalem , Safra Campus, Givat Ram, Jerusalem 91904, Israel
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10
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Chao MR, Hu CW, Chen JL. Glass substrates crosslinked with tetracycline-imprinted polymeric silicate and CdTe quantum dots as fluorescent sensors. Anal Chim Acta 2016; 925:61-9. [DOI: 10.1016/j.aca.2016.04.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 04/12/2016] [Accepted: 04/20/2016] [Indexed: 12/20/2022]
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11
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Gliddon HD, Howes PD, Kaforou M, Levin M, Stevens MM. A nucleic acid strand displacement system for the multiplexed detection of tuberculosis-specific mRNA using quantum dots. NANOSCALE 2016; 8:10087-95. [PMID: 27088427 DOI: 10.1039/c6nr00484a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The development of rapid, robust and high performance point-of-care diagnostics relies on the advancement and combination of various areas of research. We have developed an assay for the detection of multiple mRNA molecules that combines DNA nanotechnology with fluorescent nanomaterials. The core switching mechanism is toehold-mediated strand displacement. We have used fluorescent quantum dots (QDs) as signal transducers in this assay, as they bring many benefits including bright fluorescence and multiplexing abilities. The resulting assay is capable of multiplexed detection of long RNA targets against a high concentration of background non-target RNA, with high sensitivity and specificity and limits of detection in the nanomolar range using only a standard laboratory plate reader. We demonstrate the utility of our QD-based system for the detection of two genes selected from a microarray-derived tuberculosis-specific gene expression signature. Levels of up- and downregulated gene transcripts comprising this signature can be combined to give a disease risk score, making the signature more amenable for use as a diagnostic marker. Our QD-based approach to detect these transcripts could pave the way for novel diagnostic assays for tuberculosis.
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Affiliation(s)
- H D Gliddon
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, UK.
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12
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Zhou J, Yang Y, Zhang CY. Toward Biocompatible Semiconductor Quantum Dots: From Biosynthesis and Bioconjugation to Biomedical Application. Chem Rev 2015; 115:11669-717. [DOI: 10.1021/acs.chemrev.5b00049] [Citation(s) in RCA: 472] [Impact Index Per Article: 52.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Juan Zhou
- State
Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
- Single-Molecule
Detection and Imaging Laboratory, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Yong Yang
- Single-Molecule
Detection and Imaging Laboratory, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Chun-yang Zhang
- College
of Chemistry, Chemical Engineering and Materials Science, Collaborative
Innovation Center of Functionalized Probes for Chemical Imaging in
Universities of Shandong, Key Laboratory of Molecular and Nano Probes,
Ministry of Education, Shandong Provincial Key Laboratory of Clean
Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China
- Single-Molecule
Detection and Imaging Laboratory, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
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13
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Kreider-Mueller A, Quinlivan PJ, Owen JS, Parkin G. Synthesis and structures of cadmium carboxylate and thiocarboxylate compounds with a sulfur-rich coordination environment: carboxylate exchange kinetics involving tris(2-mercapto-1-t-butylimidazolyl)hydroborato cadmium complexes, [Tm(Bu(t))]Cd(O2CR). Inorg Chem 2015; 54:3835-50. [PMID: 25826184 PMCID: PMC4415050 DOI: 10.1021/acs.inorgchem.5b00017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Indexed: 11/28/2022]
Abstract
A series of cadmium carboxylate compounds in a sulfur-rich environment provided by the tris(2-tert-butylmercaptoimidazolyl)hydroborato ligand, namely, [Tm(Bu(t))]CdO2CR, has been synthesized via the reactions of the cadmium methyl derivative [Tm(Bu(t))]CdMe with RCO2H. Such compounds mimic aspects of cadmium-substituted zinc enzymes and also the surface atoms of cadmium chalcogenide crystals, and have therefore been employed to model relevant ligand exchange processes. Significantly, both (1)H and (19)F NMR spectroscopy demonstrate that the exchange of carboxylate groups between [Tm(Bu(t))]Cd(κ(2)-O2CR) and the carboxylic acid RCO2H is facile on the NMR time scale, even at low temperature. Analysis of the rate of exchange as a function of concentration of RCO2H indicates that reaction occurs via an associative rather than dissociative pathway. In addition to carboxylate compounds, the thiocarboxylate derivative [Tm(Bu(t))]Cd[κ(1)-SC(O)Ph] has also been synthesized via the reaction of [Tm(Bu(t))]CdMe with thiobenzoic acid. The molecular structure of [Tm(Bu(t))]Cd[κ(1)-SC(O)Ph] has been determined by X-ray diffraction, and an interesting feature is that, in contrast to the carboxylate derivatives [Tm(Bu(t))]Cd(κ(2)-O2CR), the thiocarboxylate ligand binds in a κ(1) manner via only the sulfur atom.
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Affiliation(s)
- Ava Kreider-Mueller
- Department of Chemistry, Columbia
University, New York, New York 10027, United
States
| | - Patrick J. Quinlivan
- Department of Chemistry, Columbia
University, New York, New York 10027, United
States
| | - Jonathan S. Owen
- Department of Chemistry, Columbia
University, New York, New York 10027, United
States
| | - Gerard Parkin
- Department of Chemistry, Columbia
University, New York, New York 10027, United
States
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14
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Tung HY, Su YC, Chen BM, Burnouf PA, Huang WC, Chuang KH, Yan YT, Cheng TL, Roffler SR. Selective Delivery of PEGylated Compounds to Tumor Cells by Anti-PEG Hybrid Antibodies. Mol Cancer Ther 2015; 14:1317-26. [PMID: 25852063 DOI: 10.1158/1535-7163.mct-15-0151] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 03/25/2015] [Indexed: 11/16/2022]
Abstract
Polyethylene glycol (PEG) is attached to many peptides, proteins, liposomes, and nanoparticles to reduce their immunogenicity and improve their pharmacokinetic and therapeutic properties. Here, we describe hybrid antibodies that can selectively deliver PEGylated medicines, imaging agents, or nanomedicines to target cells. Human IgG1 hybrid antibodies αPEG:αHER2 and αPEG:αCD19 were shown by ELISA, FACS, and plasmon resonance to bind to both PEG and HER2 receptors on SK-BR-3 breast adenocarcinoma and BT-474 breast ductal carcinoma cells or CD19 receptors on Ramos and Raji Burkitt's lymphoma cells. In addition, αPEG:αHER2 specifically targeted PEGylated proteins, liposomes, and nanoparticles to SK-BR-3 cells that overexpressed HER2, but not to HER2-negative MCF-7 breast adenocarcinoma cells. Endocytosis of PEGylated nanoparticles into SK-BR-3 cells was induced specifically by the αPEG:αHER2 hybrid antibody, as observed by confocal imaging of the accumulation of Qdots inside SK-BR-3 cells. Treatment of HER2(+) SK-BR-3 and BT-474 cancer cells with αPEG:αHER2 and the clinically used chemotherapeutic agent PEGylated liposomal doxorubicin for 3 hours enhanced the in vitro effectiveness of PEGylated liposomal doxorubicin by over two orders of magnitude. Hybrid anti-PEG antibodies offer a versatile and simple method to deliver PEGylated compounds to cellular locations and can potentially enhance the therapeutic efficacy of PEGylated medicines.
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Affiliation(s)
- Hsin-Yi Tung
- Taiwan International Graduate Program in Molecular Medicine, National Yang-Ming University and Academia Sinica, Taipei, Taiwan. Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan. Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Yu-Cheng Su
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Bing-Mae Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Pierre-Alain Burnouf
- Taiwan International Graduate Program in Molecular Medicine, National Yang-Ming University and Academia Sinica, Taipei, Taiwan. Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan. Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Wei-Chiao Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Kuo-Hsiang Chuang
- Graduate Institute of Pharmacognosy, Taipei Medical University, Taipei, Taiwan
| | - Yu-Ting Yan
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Tian-Lu Cheng
- Faculty of Biomedical Science and Environmental Biology, MedicoGenomic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Steve R Roffler
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
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15
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Montón H, Parolo C, Aranda-Ramos A, Merkoçi A, Nogués C. Annexin-V/quantum dot probes for multimodal apoptosis monitoring in living cells: improving bioanalysis using electrochemistry. NANOSCALE 2015; 7:4097-4104. [PMID: 25665597 DOI: 10.1039/c4nr07191c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
There is a great demand to develop novel techniques that allow useful and complete monitoring of apoptosis, which is a key factor of several diseases and a target for drug development. Here, we present the use of a novel dual electrochemical/optical label for the detection and study of apoptosis. We combined the specificity of Annexin-V for phosphatidylserine, a phospholipid expressed in the outer membrane of apoptotic cells, with the optical and electrochemical properties of quantum dots to create a more efficient label. Using this conjugate we addressed three important issues: (i) we made the labeling of apoptotic cells faster (30 min) and easier; (ii) we fully characterized the samples by common cell biological techniques (confocal laser scanning microscopy, scanning electron microscopy and flow cytometry); and (iii) we developed a fast, cheap and quantitative electrochemical detection method for apoptotic cells with results in full agreement with those obtained by flow cytometry.
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Affiliation(s)
- Helena Montón
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Campus UAB-Facultat de Biociències, 08193 Bellaterra, Barcelona, Spain.
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