1
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Lamontagne HR, Cranston RR, Comeau ZJ, Harris CS, Shuhendler AJ, Lessard BH. Axial Phenoxylation of Aluminum Phthalocyanines for Improved Cannabinoid Sensitivity in OTFT Sensors. Adv Sci (Weinh) 2024:e2305515. [PMID: 38641886 DOI: 10.1002/advs.202305515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 02/16/2024] [Indexed: 04/21/2024]
Abstract
Cannabis producers, consumers, and regulators need fast, accurate, point-of-use sensors to detect Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD) from both liquid and vapor source samples, and phthalocyanine-based organic thin-film transistors (OTFTs) provide a cost-effective solution. Chloro aluminum phthalocyanine (Cl-AlPc) has emerged as a promising material due to its unique coordinating interactions with cannabinoids, allowing for superior sensitivity. This work explores the molecular engineering of AlPc to tune and enhance these interactions, where a series of novel phenxoylated R-AlPcs are synthesized and integrated into OTFTs, which are then exposed to THC and CBD solution and vapor samples. While the R-AlPc substituted molecules have a comparable baseline device performance to Cl-AlPc, their new crystal structures and weakened intermolecular interactions increase sensitivity to THC. Grazing-incidence wide-angle X-ray scattering (GIWAXS) and atomic force microscopy (AFM) are used to investigate this film restructuring, where a significant shift in the crystal structure, grain size, and film roughness is detected for the R-AlPc molecules that do not occur with Cl-AlPc. This significant crystal reorganization and film restructuring are the driving force behind the improved sensitivity to cannabinoids relative to Cl-AlPc and demonstrate that analyte-semiconductor interactions can be enhanced through chemical modification to create more responsive OTFT sensors.
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Affiliation(s)
- Halynne R Lamontagne
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
| | - Rosemary R Cranston
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
| | - Zachary J Comeau
- Advanced Electronics and Devices, National Research Council Canada, 1200 Montreal Rd, Ottawa, ON, K1A 0R6, Canada
| | - Cory S Harris
- Department of Biology, University of Ottawa, 30 Marie Curie, Ottawa, ON, K1N 6N5, Canada
| | - Adam J Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
- Department of Biology, University of Ottawa, 30 Marie Curie, Ottawa, ON, K1N 6N5, Canada
- University of Ottawa Heart Institute, 40 Ruskin St, Ottawa, ON, K1Y 4W7, Canada
| | - Benoît H Lessard
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Ave, Ottawa, ON, K1N 6N5, Canada
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2
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Kirby A, Suchý M, Duan D, Bazett M, Kalyan S, Shuhendler AJ. Tracking the fate of bacteria-derived site-specific immunomodulators by positron emission tomography. Nucl Med Biol 2024; 132-133:108908. [PMID: 38599145 DOI: 10.1016/j.nucmedbio.2024.108908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/08/2024] [Accepted: 03/27/2024] [Indexed: 04/12/2024]
Abstract
INTRODUCTION Site-specific immunomodulators (SSIs) are a novel class of therapeutics made from inactivated bacterial species designed to regulate the innate immune system in targeted organs. QBECO is a gut-targeted SSI that is being advanced clinically to treat and/or prevent inflammatory bowel disease, cancer, and serious infections of the gastrointestinal (GI) tract and proximal organs, and QBKPN is a lung-targeted SSI that is in clinical development for the treatment and/or prevention of chronic inflammatory lung disease, lung cancers and respiratory tract infections. While these SSIs have demonstrated both safety and proof-of-concept in preclinical and clinical studies, detailed understanding of their trafficking and biodistribution is yet to be fully characterized. METHODS QBECO and QBKPN were radiolabeled with [89Zr] and injected subcutaneously into healthy mice. The mice underwent Positron Emission Tomography (PET) imaging every day for eight days to track biodistribution of the SSIs. Tissue from the site of injection was collected and immunohistologically probed for immune cell infiltration. RESULTS Differential biodistribution of the two SSIs was seen, adhering to their site-specific targeting. QBKPN appeared to migrate from the site of injection (abdomen) to the cervical lymph nodes which are nearer to the respiratory tract and lungs. QBECO remained in the abdominal region, with lymphatic trafficking to the inguinal lymph nodes, which are nearer to GI-proximal tissues/organs. Immune infiltration at the site of injection comprised of neutrophils for both SSIs, and macrophages for only QBKPN. CONCLUSION Radiolabeling of SSIs allows for longitudinal in vivo imaging of biodistribution and trafficking. PET imaging revealed differential biodistribution of the SSIs based on the organotropism of the bacteria from which the SSI is derived. Trafficking from the site of injection to the targeted site is in part mediated via the lymphatics and involves macrophages and neutrophils.
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Affiliation(s)
- Alexia Kirby
- Department of Biology, University of Ottawa, Ottawa, ON, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada
| | - Mojmír Suchý
- University of Ottawa Heart Institute, Ottawa, ON, Canada; Department of Chemistry and Biomolecular Sciences, Ottawa, ON, Canada
| | - Daniel Duan
- University of Ottawa Heart Institute, Ottawa, ON, Canada
| | | | - Shirin Kalyan
- Qu Biologics Inc., Vancouver, BC, Canada; Department of Medicine, Division of Endocrinology, University of British Columbia, Vancouver, BC, Canada
| | - Adam J Shuhendler
- Department of Biology, University of Ottawa, Ottawa, ON, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Department of Chemistry and Biomolecular Sciences, Ottawa, ON, Canada.
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3
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Manigat F, Connell LB, Stewart BN, LePabic AR, Tessier CJG, Emlaw JR, Calvert ND, Rössl A, Shuhendler AJ, daCosta CJB, Campbell-Valois FX. pUdOs: Concise Plasmids for Bacterial and Mammalian Cells. ACS Synth Biol 2024; 13:485-497. [PMID: 38235654 PMCID: PMC10878396 DOI: 10.1021/acssynbio.3c00408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 11/22/2023] [Accepted: 11/28/2023] [Indexed: 01/19/2024]
Abstract
The plasmids from the Université d'Ottawa (pUdOs) are 28 small plasmids each comprising one of four origins of replication and one of seven selection markers, which together afford flexible use in Escherichia coli and several related gram-negative bacteria. The promoterless multicloning site is insulated from upstream spurious promoters by strong transcription terminators and contains type IIP or IIS restriction sites for conventional or Golden Gate cloning. pUdOs can be converted into efficient expression vectors through the insertion of a promoter at the user's discretion. For example, we demonstrate the utility of pUdOs as the backbone for an improved version of a Type III Secretion System reporter in Shigella. In addition, we derive a series of pUdO-based mammalian expression vectors, affording distinct levels of expression and transfection efficiency comparable to commonly used mammalian expression plasmids. Thus, pUdOs could advantageously replace traditional plasmids in a wide variety of cell types and applications.
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Affiliation(s)
- France
O. Manigat
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Louise B. Connell
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Brittany N. Stewart
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Abdel-Rahman LePabic
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Christian J. G. Tessier
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Johnathon R. Emlaw
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Nicholas D. Calvert
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Anthony Rössl
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Adam J. Shuhendler
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- University
of Ottawa Heart Institute, Ottawa, Ontario K1Y 4W7, Canada
| | - Corrie J. B. daCosta
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - François-Xavier Campbell-Valois
- Center
for Chemical and Synthetic Biology, Department of Chemistry and Biomolecular
Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- bioGARAGE,
Faculty of Science, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- Centre
for Infection, Immunity and Inflammation, Department of Biochemistry,
Microbiology and Immunology, University
of Ottawa, Ottawa, Ontario K1N 6N5, Canada
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4
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Kirby A, Shuhendler AJ. Small Animal Multisubject PET/CT Workflow. Methods Mol Biol 2024; 2729:185-193. [PMID: 38006497 DOI: 10.1007/978-1-0716-3499-8_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2023]
Abstract
Positron emission tomography (PET) is a highly sensitive molecular imaging technique that uses radioactive tracers to map molecular and metabolic processes in living animals. PET can be performed as a stand-alone modality but is often combined with CT to provide for objective anatomical localization of PET signals in a multimodality approach. In order to outline the general approach to evaluating four mice simultaneously by dynamic PET imaging, the use of the aldehyde-targeted radiotracer [18F]NA3BF3 in mouse models of hepatotoxicity will be described. Indeed the production of aldehydes is upregulated in a wide range of disease and injury, making them a suitable biomarker for PET imaging of numerous pathologies.
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Affiliation(s)
- Alexia Kirby
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
- University of Ottawa Heart Institute, Ottawa, ON, Canada
| | - Adam J Shuhendler
- University of Ottawa Heart Institute, Ottawa, ON, Canada.
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.
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5
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Liu N, Homann C, Morfin S, Kesanakurti MS, Calvert ND, Shuhendler AJ, Al T, Hemmer E. Core-multi-shell design: unlocking multimodal capabilities in lanthanide-based nanoparticles as upconverting, T2-weighted MRI and CT probes. Nanoscale 2023. [PMID: 37982139 DOI: 10.1039/d3nr05380f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2023]
Abstract
Multimodal bioimaging probes merging optical imaging, magnetic resonance imaging (MRI), and X-ray computed tomography (CT) capabilities have attracted considerable attention due to their potential biomedical applications. Lanthanide-based nanoparticles are promising candidates for multimodal imaging because of their optical, magnetic and X-ray attenuation properties. We prepared a set of hexagonal-phase (β)-NaGdF4:Yb,Er/NaGdF4/NaDyF4 core/shell/shell nanoparticles (Dy-CSS NPs) and demonstrated their optical/T2-weighted MRI/CT multimodal capabilities. A known drawback of multimodal probes that merge the upconverting Er3+/Yb3+ ion pair with magnetic Dy3+ ions for T2-weighted MRI is the loss of upconversion (UC) emission due to Dy3+ poisoning. Particular attention was paid to controlled nanoparticle architectures with tuned inner shell thicknesses separating Dy3+ and Er3+/Yb3+ to shed light on the distance-dependent loss of UC due to Yb3+ → Dy3+ energy transfer. Based on the Er3+ UC spectra and the excited state lifetime of Yb3+, a 4 nm thick NaGdF4 inner shell did not only restore but enhanced the UC emission. We further investigated the effect of the outer NaDyF4 shell thickness on the particles' magnetic and CT performance. MRI T2 relaxivity measurements in vitro at a magnetic field of 7 T performed on citrate-capped Dy-CSS NPs revealed that NPs with the thickest outer shell thickness (4 nm) exhibited the highest r2 value, with a superior T2 contrast effect compared to commercial iron oxide and other Dy-based T2 contrast agents. In addition, the citrate-capped Dy-CSS NPs were demonstrated suitable for CT in in vitro imaging phantoms at X-ray energies of 110 keV, rendering them interesting alternatives to clinically used iodine-based agents that operate at lower energies.
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Affiliation(s)
- Nan Liu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.
| | - Christian Homann
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.
| | - Samuel Morfin
- Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Meghana S Kesanakurti
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.
| | - Nicholas D Calvert
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.
- University of Ottawa Heart Institute, Ottawa, ON, Canada
| | - Adam J Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.
- University of Ottawa Heart Institute, Ottawa, ON, Canada
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Tom Al
- Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Eva Hemmer
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.
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6
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Gates EWJ, Calvert ND, Cundy NJ, Brugnoli F, Navals P, Kirby A, Bianchi N, Adhikary G, Shuhendler AJ, Eckert RL, Keillor JW. Cell-Impermeable Inhibitors Confirm That Intracellular Human Transglutaminase 2 Is Responsible for the Transglutaminase-Associated Cancer Phenotype. Int J Mol Sci 2023; 24:12546. [PMID: 37628729 PMCID: PMC10454375 DOI: 10.3390/ijms241612546] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/24/2023] [Accepted: 07/31/2023] [Indexed: 08/27/2023] Open
Abstract
Transglutaminase 2 (TG2) is a multifunctional enzyme primarily responsible for crosslinking proteins. Ubiquitously expressed in humans, TG2 can act either as a transamidase by crosslinking two substrates through formation of an Nε(ɣ-glutaminyl)lysine bond or as an intracellular G-protein. These discrete roles are tightly regulated by both allosteric and environmental stimuli and are associated with dramatic changes in the conformation of the enzyme. The pleiotropic nature of TG2 and multi-faceted activities have resulted in TG2 being implicated in numerous disease pathologies including celiac disease, fibrosis, and cancer. Targeted TG2 therapies have not been selective for subcellular localization, such that currently no tools exist to selectively target extracellular over intracellular TG2. Herein, we have designed novel TG2-selective inhibitors that are not only highly potent and irreversible, but also cell impermeable, targeting only extracellular TG2. We have also further derivatized the scaffold to develop probes that are intrinsically fluorescent or bear an alkyne handle, which target both intra- and extracellular TG2, in order to facilitate cellular labelling and pull-down assays. The fluorescent probes were internalized and imaged in cellulo, and provide the first implicit experimental evidence that by comparison with their cell-impermeable analogues, it is specifically intracellular TG2, and presumably its G-protein activity, that contributes to transglutaminase-associated cancer progression.
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Affiliation(s)
- Eric W. J. Gates
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (E.W.J.G.); (N.D.C.); (N.J.C.); (P.N.); (A.K.); (A.J.S.)
| | - Nicholas D. Calvert
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (E.W.J.G.); (N.D.C.); (N.J.C.); (P.N.); (A.K.); (A.J.S.)
| | - Nicholas J. Cundy
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (E.W.J.G.); (N.D.C.); (N.J.C.); (P.N.); (A.K.); (A.J.S.)
| | - Federica Brugnoli
- Department of Translational Medicine, University of Ferrara, 44021 Ferrara, Italy; (F.B.); (N.B.)
| | - Pauline Navals
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (E.W.J.G.); (N.D.C.); (N.J.C.); (P.N.); (A.K.); (A.J.S.)
| | - Alexia Kirby
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (E.W.J.G.); (N.D.C.); (N.J.C.); (P.N.); (A.K.); (A.J.S.)
| | - Nicoletta Bianchi
- Department of Translational Medicine, University of Ferrara, 44021 Ferrara, Italy; (F.B.); (N.B.)
| | - Gautam Adhikary
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; (G.A.); (R.L.E.)
| | - Adam J. Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (E.W.J.G.); (N.D.C.); (N.J.C.); (P.N.); (A.K.); (A.J.S.)
| | - Richard L. Eckert
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; (G.A.); (R.L.E.)
| | - Jeffrey W. Keillor
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (E.W.J.G.); (N.D.C.); (N.J.C.); (P.N.); (A.K.); (A.J.S.)
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7
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Calvert ND, Kirby A, Suchý M, Pallister P, Torrens AA, Burger D, Melkus G, Schieda N, Shuhendler AJ. Direct mapping of kidney function by DCE-MRI urography using a tetrazinanone organic radical contrast agent. Nat Commun 2023; 14:3965. [PMID: 37407664 DOI: 10.1038/s41467-023-39720-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 06/27/2023] [Indexed: 07/07/2023] Open
Abstract
Chronic kidney disease (CKD) and acute kidney injury (AKI) are ongoing global health burdens. Glomerular filtration rate (GFR) is the gold standard measure of kidney function, with clinical estimates providing a global assessment of kidney health without spatial information of kidney- or region-specific dysfunction. The addition of dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) to the anatomical imaging already performed would yield a 'one-stop-shop' for renal assessment in cases of suspected AKI and CKD. Towards urography by DCE-MRI, we evaluated a class of nitrogen-centered organic radicals known as verdazyls, which are extremely stable even in highly reducing environments. A glucose-modified verdazyl, glucoverdazyl, provided contrast limited to kidney and bladder, affording functional kidney evaluation in mouse models of unilateral ureteral obstruction (UUO) and folic acid-induced nephropathy (FAN). Imaging outcomes correlated with histology and hematology assessing kidney dysfunction, and glucoverdazyl clearance rates were found to be a reliable surrogate measure of GFR.
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Affiliation(s)
- Nicholas D Calvert
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur Pvt., Ottawa, Ontario, K1N 6N5, Canada
| | - Alexia Kirby
- Department of Biology, University of Ottawa, 150 Louis Pasteur Pvt., Ottawa, Ontario, K1N 6N5, Canada
| | - Mojmír Suchý
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur Pvt., Ottawa, Ontario, K1N 6N5, Canada
| | - Peter Pallister
- Department of Chemistry, Carleton University, 1125 Colonel By Dr., Ottawa, Ontario, K1S 5B6, Canada
| | - Aidan A Torrens
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur Pvt., Ottawa, Ontario, K1N 6N5, Canada
| | - Dylan Burger
- Kidney Research Center, Ottawa Hospital Research Institute, University of Ottawa, 501 Smyth Rd, Ottawa, Ontario, K1H 8L6, Canada
| | - Gerd Melkus
- Dept. Medical Imaging, The Ottawa Hospital, 501 Smyth Rd, Ottawa, Ontario, K1H 8L6, Canada
- Dept. Radiology, University of Ottawa, 501 Smyth Rd, Ottawa, Ontario, K1H 8L6, Canada
| | - Nicola Schieda
- Dept. Radiology, University of Ottawa, 501 Smyth Rd, Ottawa, Ontario, K1H 8L6, Canada
| | - Adam J Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur Pvt., Ottawa, Ontario, K1N 6N5, Canada.
- Department of Biology, University of Ottawa, 150 Louis Pasteur Pvt., Ottawa, Ontario, K1N 6N5, Canada.
- University of Ottawa Heart Institute, 40 Ruskin St., Ottawa, Ontario, K1Y 4W7, Canada.
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8
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Bourgonje CR, da Silva DRC, McIlroy E, Calvert ND, Shuhendler AJ, Scaiano JC. Silver nanoparticles with exceptional near-infrared absorbance for photoenhanced antimicrobial applications. J Mater Chem B 2023. [PMID: 37338380 DOI: 10.1039/d3tb00199g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
In this work, we outline a simple method for synthesizing decahedral and triangular silver nanoparticles using light to tune particle shape and spectral characteristics. Notably, we were able to generate triangular silver nanoparticles with exceptional absorbance in the near-infrared (NIR) region, with high spectral overlap with the biological window, making them particularly promising for biological applications. We further demonstrate that under complementary LED illumination, these excitable plasmonic particles display exceptional antibacterial properties, several orders of magnitude more potent than similar particles under dark conditions or under illumination that does not match particle absorbance. This work demonstrates the powerful effects that LED lights can have on the antibacterial activity of AgNPs, providing an inexpensive and easily implemented route to unlocking the full potential of AgNPs in photobiological applications.
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Affiliation(s)
- Connor R Bourgonje
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
| | - Daliane R C da Silva
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
| | - Ella McIlroy
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
| | - Nicholas D Calvert
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
| | - Adam J Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
| | - Juan C Scaiano
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
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9
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Béland-Millar A, Kirby A, Truong Y, Ouellette J, Yandiev S, Bouyakdan K, Pileggi C, Naz S, Yin M, Carrier M, Kotchetkov P, St-Pierre MK, Tremblay MÈ, Courchet J, Harper ME, Alquier T, Messier C, Shuhendler AJ, Lacoste B. 16p11.2 haploinsufficiency reduces mitochondrial biogenesis in brain endothelial cells and alters brain metabolism in adult mice. Cell Rep 2023; 42:112485. [PMID: 37149866 DOI: 10.1016/j.celrep.2023.112485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 02/20/2023] [Accepted: 04/22/2023] [Indexed: 05/09/2023] Open
Abstract
Neurovascular abnormalities in mouse models of 16p11.2 deletion autism syndrome are reminiscent of alterations reported in murine models of glucose transporter deficiency, including reduced brain angiogenesis and behavioral alterations. Yet, whether cerebrovascular alterations in 16p11.2df/+ mice affect brain metabolism is unknown. Here, we report that anesthetized 16p11.2df/+ mice display elevated brain glucose uptake, a phenomenon recapitulated in mice with endothelial-specific 16p11.2 haplodeficiency. Awake 16p11.2df/+ mice display attenuated relative fluctuations of extracellular brain glucose following systemic glucose administration. Targeted metabolomics on cerebral cortex extracts reveals enhanced metabolic responses to systemic glucose in 16p11.2df/+ mice that also display reduced mitochondria number in brain endothelial cells. This is not associated with changes in mitochondria fusion or fission proteins, but 16p11.2df/+ brain endothelial cells lack the splice variant NT-PGC-1α, suggesting defective mitochondrial biogenesis. We propose that altered brain metabolism in 16p11.2df/+ mice is compensatory to endothelial dysfunction, shedding light on previously unknown adaptative responses.
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Affiliation(s)
- Alexandria Béland-Millar
- Neuroscience Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada; School of Psychology, University of Ottawa, Ottawa, ON, Canada
| | - Alexia Kirby
- Faculty of Science, Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Yen Truong
- Faculty of Science, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Julie Ouellette
- Neuroscience Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada; Faculty of Medicine, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Sozerko Yandiev
- University Lyon 1, CNRS, INSERM, Physiopathologie et Génétique du Neurone et du Muscle, UMR5261, U1315, Institut NeuroMyoGène, 69008 Lyon, France
| | - Khalil Bouyakdan
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Department of Medicine Université de Montréal, Montreal, QC, Canada
| | - Chantal Pileggi
- Faculty of Medicine, Department of Biochemistry Microbiology and Immunology, Ottawa, ON, Canada
| | - Shama Naz
- University of Ottawa Metabolomics Core Facility, Faculty of Medicine, Ottawa, ON, Canada
| | - Melissa Yin
- FUJIFILM VisualSonics, Inc, Toronto, ON, Canada
| | - Micaël Carrier
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Pavel Kotchetkov
- Neuroscience Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada; Faculty of Medicine, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada
| | | | - Marie-Ève Tremblay
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada; Neurology and Neurosurgery Department, McGill University, Montreal, QC, Canada; Department of Biochemistry and Molecular Biology, The University of British Columbia, Vancouver, BC, Canada
| | - Julien Courchet
- University Lyon 1, CNRS, INSERM, Physiopathologie et Génétique du Neurone et du Muscle, UMR5261, U1315, Institut NeuroMyoGène, 69008 Lyon, France
| | - Mary-Ellen Harper
- Faculty of Medicine, Department of Biochemistry Microbiology and Immunology, Ottawa, ON, Canada
| | - Thierry Alquier
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Department of Medicine Université de Montréal, Montreal, QC, Canada
| | - Claude Messier
- School of Psychology, University of Ottawa, Ottawa, ON, Canada
| | - Adam J Shuhendler
- Faculty of Science, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada; University of Ottawa Brain and Mind Research Institute, Ottawa, ON, Canada
| | - Baptiste Lacoste
- Neuroscience Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada; Faculty of Medicine, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada; University of Ottawa Brain and Mind Research Institute, Ottawa, ON, Canada.
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10
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Comeau ZJ, Cranston RR, Lamontagne HR, Shuhendler AJ, Lessard BH. Strong Magnetic Field Annealing for Improved Phthalocyanine Organic Thin-Film Transistors. Small 2023; 19:e2206792. [PMID: 36567424 DOI: 10.1002/smll.202206792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/11/2022] [Indexed: 06/17/2023]
Abstract
Thin-film microstructure, morphology, and polymorphism can be controlled and optimized to improve the performance of carbon-based electronics. Thermal or solvent vapor annealing are common post-deposition processing techniques; however, it can be difficult to control or destructive to the active layer or substrates. Here, the use of a static, strong magnetic field (SMF) as a non-destructive process for the improvement of phthalocyanine (Pc) thin-film microstructure, increasing organic thin-film transistor (OTFTs) mobility by twofold, is demonstrated. Grazing incident wide-angle X-ray scattering (GIWAXS), X-ray diffraction (XRD), and atomic force microscopy (AFM) elucidate the effect of SMF on both para- and diamagnetic Pc thin-films when subjected to a magnetic field. A SMF is found to increase the concentration of oxygen-induced radical species within the Pc thin-film, lending a paramagnetic character to ordinarily diamagnetic metal-free Pc and resulting in magnetic field induced changes to its thin-film microstructures. In a nitrogen environment, without competing degradation effects of molecular oxygen, SMF processing is found to favorably improve charge transport characteristics and increase OTFT mobility. Thus, post-deposition thin-film annealing with a magnetic field is presented as an alternative and promising technique for future thin-film engineering applications.
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Affiliation(s)
- Zachary J Comeau
- University of Ottawa, Department of Chemical and Biological Engineering, 161 Louis Pasteur, Ottawa, ON, K1N6N5, Canada
- University of Ottawa, Department of Chemistry and Biomolecular Sciences, 150 Louis Pasteur, Ottawa, ON, K1N9A7, Canada
| | - Rosemary R Cranston
- University of Ottawa, Department of Chemical and Biological Engineering, 161 Louis Pasteur, Ottawa, ON, K1N6N5, Canada
| | - Halynne R Lamontagne
- University of Ottawa, Department of Chemical and Biological Engineering, 161 Louis Pasteur, Ottawa, ON, K1N6N5, Canada
- University of Ottawa, Department of Chemistry and Biomolecular Sciences, 150 Louis Pasteur, Ottawa, ON, K1N9A7, Canada
| | - Adam J Shuhendler
- University of Ottawa, Department of Chemistry and Biomolecular Sciences, 150 Louis Pasteur, Ottawa, ON, K1N9A7, Canada
- University of Ottawa, Department of Biology, 30 Marie Curie, Ottawa, ON, K1N9B4, Canada
- University of Ottawa Heart Institute, 40 Ruskin St, Ottawa, ON, K1Y4W7, Canada
| | - Benoît H Lessard
- University of Ottawa, Department of Chemical and Biological Engineering, 161 Louis Pasteur, Ottawa, ON, K1N6N5, Canada
- University of Ottawa, School of Electrical Engineering and Computer Science, 800 King Edward Ave, Ottawa, ON, K1N6N5, Canada
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11
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Rodrigues EM, Calvert ND, Crawford JC, Liu N, Shuhendler AJ, Hemmer E. Phytoglycogen Encapsulation of Lanthanide-Based Nanoparticles as an Optical Imaging Platform with Therapeutic Potential. Small 2022; 18:e2107130. [PMID: 35560500 DOI: 10.1002/smll.202107130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 04/23/2022] [Indexed: 06/15/2023]
Abstract
Lanthanide-based upconverting nanoparticles (UCNPs) are largely sought-after for biomedical applications ranging from bioimaging to therapy. A straightforward strategy is proposed here using the naturally sourced polymer phytoglycogen to coencapsulate UCNPs with hydrophobic photosensitizers as an optical imaging platform and light-induced therapeutic agents. The resulting multifunctional sub-micrometer-sized luminescent beads are shown to be cytocompatible as carrier materials, which encourages the assessment of their potential in biomedical applications. The loading of UCNPs of various elemental compositions enables multicolor hyperspectral imaging of the UCNP-loaded beads, endowing these materials with the potential to serve as luminescent tags for multiplexed imaging or simultaneous detection of different moieties under near-infrared (NIR) excitation. Coencapsulation of UCNPs and Rose Bengal opens the door for potential application of these microcarriers for collagen crosslinking. Alternatively, coloading UCNPs with Chlorin e6 enables NIR-light triggered generation of reactive oxygen species. Overall, the developed encapsulation methodology offers a straightforward and noncytotoxic strategy yielding water-dispersible UCNPs while preserving their bright and color-tunable upconversion emission that would allow them to fulfill their potential as multifunctional platforms for biomedical applications.
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Affiliation(s)
- Emille M Rodrigues
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario, K1N 6N5, Canada
| | - Nicholas D Calvert
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario, K1N 6N5, Canada
- University of Ottawa Heart Institute, University of Ottawa, 501 Smyth Road, Ottawa, Ontario, K1Y 4W7, Canada
| | - Justin C Crawford
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario, K1N 6N5, Canada
| | - Nan Liu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario, K1N 6N5, Canada
| | - Adam J Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario, K1N 6N5, Canada
- University of Ottawa Heart Institute, University of Ottawa, 501 Smyth Road, Ottawa, Ontario, K1Y 4W7, Canada
- Centre for Advanced Materials Research (CAMaR), University of Ottawa, 25 Templeton, Ottawa, Ontario, K1N 6X1, Canada
| | - Eva Hemmer
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario, K1N 6N5, Canada
- Centre for Advanced Materials Research (CAMaR), University of Ottawa, 25 Templeton, Ottawa, Ontario, K1N 6X1, Canada
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12
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Pereira R, Flaherty RL, Edwards RS, Greenwood HE, Shuhendler AJ, Witney TH. A prodrug strategy for the in vivo imaging of aldehyde dehydrogenase activity. RSC Chem Biol 2022; 3:561-570. [PMID: 35656483 PMCID: PMC9092432 DOI: 10.1039/d2cb00040g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 03/04/2022] [Indexed: 11/21/2022] Open
Abstract
Therapy resistance is one of the biggest challenges facing clinical oncology. Despite a revolution in new anti-cancer drugs targeting multiple components of the tumour microenvironment, acquired or innate resistance frequently blunts the efficacy of these treatments. Non-invasive identification of drug-resistant tumours will enable modification of the patient treatment pathway through the selection of appropriate second-line treatments. Here, we have designed a prodrug radiotracer for the non-invasive imaging of aldehyde dehydrogenase 1A1 (ALDH1A1) activity. Elevated ALDH1A1 activity is a marker of drug-resistant cancer cells, modelled here with matched cisplatin-sensitive and -resistant human SKOV3 ovarian cancer cells. The aromatic aldehyde of our prodrug radiotracer was intracellularly liberated by esterase cleavage of the geminal diacetate and specifically trapped by ALDH through its conversion to the charged carboxylic acid. Through this mechanism of action, ALDH-specific retention of our prodrug radiotracer in the drug-resistant tumour cells was twice as high as the drug-sensitive cells. Acylal masking of the aldehyde afforded a modest protection from oxidation in the blood, which was substantially improved in carrier-added experiments. In vivo positron emission tomography imaging of tumour-bearing mice produced high tumour-to-background images and radiotracer uptake in high ALDH-expressing organs but was unable to differentiate between drug-sensitive and drug-resistant tumours. Alternative strategies to protect the labile aldehyde are currently under investigation.
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Affiliation(s)
- Raul Pereira
- School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas' Hospital London SE1 7EH UK +44 (0)20 7188 7188, ext. 883496
| | - Renée L Flaherty
- School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas' Hospital London SE1 7EH UK +44 (0)20 7188 7188, ext. 883496
| | - Richard S Edwards
- School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas' Hospital London SE1 7EH UK +44 (0)20 7188 7188, ext. 883496
| | - Hannah E Greenwood
- School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas' Hospital London SE1 7EH UK +44 (0)20 7188 7188, ext. 883496
| | - Adam J Shuhendler
- Department of Chemistry & Biomolecular Sciences, University of Ottawa Ottawa ON Canada
- University of Ottawa Heart Institute Ottawa ON Canada
| | - Timothy H Witney
- School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas' Hospital London SE1 7EH UK +44 (0)20 7188 7188, ext. 883496
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13
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Darnowski MG, Lanosky TD, Labana P, Brazeau-Henrie JT, Calvert ND, Dornan MH, Natola C, Paquette AR, Shuhendler AJ, Boddy CN. Armeniaspirol analogues with more potent Gram-positive antibiotic activity show enhanced inhibition of the ATP-dependent proteases ClpXP and ClpYQ. RSC Med Chem 2022; 13:436-444. [PMID: 35647545 PMCID: PMC9020616 DOI: 10.1039/d1md00355k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/07/2022] [Indexed: 11/21/2022] Open
Abstract
Antibiotics with fundamentally new mechanisms of action such as the armeniaspirols, which target the ATP-dependent proteases ClpXP and ClpYQ, must be developed to combat antimicrobial resistance. While the mechanism of action of armeniaspirol against Gram-positive bacteria is understood, little is known about the structure-activity relationship for its antibiotic activity. Based on the preliminary data showing that modifications of armeniaspirol's N-methyl group increased antibiotic potency, we probed the structure-activity relationship of N-alkyl armeniaspirol derivatives. A series of focused derivatives were synthesized and evaluated for antibiotic activity against clinically relevant pathogens including methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus. Replacement of the N-methyl with N-hexyl, various N-benzyl, and N-phenethyl substituents led to substantial increases in antibiotic activity and potency for inhibition of both ClpYQ and ClpXP. Docking studies identified binding models for ClpXP and ClpYQ that were consistent with the inhibition data. This work confirms the role of ClpXP and ClpYQ in the mechanism of action of armeniaspirol and provides important lead compounds for further antibiotic development.
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Affiliation(s)
- Michael G. Darnowski
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Taylor D. Lanosky
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Puneet Labana
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Jordan T. Brazeau-Henrie
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Nicholas D. Calvert
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Mark H. Dornan
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Claudia Natola
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - André R. Paquette
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Adam J. Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Christopher N. Boddy
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
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14
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Comeau ZJ, Lessard BH, Shuhendler AJ. The Need to Pair Molecular Monitoring Devices with Molecular Imaging to Personalize Health. Mol Imaging Biol 2022; 24:675-691. [PMID: 35257276 PMCID: PMC8901094 DOI: 10.1007/s11307-022-01714-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/16/2022] [Accepted: 02/18/2022] [Indexed: 12/11/2022]
Abstract
By enabling the non-invasive monitoring and quantification of biomolecular processes, molecular imaging has dramatically improved our understanding of disease. In recent years, non-invasive access to the molecular drivers of health versus disease has emboldened the goal of precision health, which draws on concepts borrowed from process monitoring in engineering, wherein hundreds of sensors can be employed to develop a model which can be used to preventatively detect and diagnose problems. In translating this monitoring regime from inanimate machines to human beings, precision health posits that continual and on-the-spot monitoring are the next frontiers in molecular medicine. Early biomarker detection and clinical intervention improves individual outcomes and reduces the societal cost of treating chronic and late-stage diseases. However, in current clinical settings, methods of disease diagnoses and monitoring are typically intermittent, based on imprecise risk factors, or self-administered, making optimization of individual patient outcomes an ongoing challenge. Low-cost molecular monitoring devices capable of on-the-spot biomarker analysis at high frequencies, and even continuously, could alter this paradigm of therapy and disease prevention. When these devices are coupled with molecular imaging, they could work together to enable a complete picture of pathogenesis. To meet this need, an active area of research is the development of sensors capable of point-of-care diagnostic monitoring with an emphasis on clinical utility. However, a myriad of challenges must be met, foremost, an integration of the highly specialized molecular tools developed to understand and monitor the molecular causes of disease with clinically accessible techniques. Functioning on the principle of probe-analyte interactions yielding a transducible signal, probes enabling sensing and imaging significantly overlap in design considerations and targeting moieties, however differing in signal interpretation and readout. Integrating molecular sensors with molecular imaging can provide improved data on the personal biomarkers governing disease progression, furthering our understanding of pathogenesis, and providing a positive feedback loop toward identifying additional biomarkers and therapeutics. Coupling molecular imaging with molecular monitoring devices into the clinical paradigm is a key step toward achieving precision health.
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Affiliation(s)
- Zachary J Comeau
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
| | - Benoît H Lessard
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Ave., Ottawa, ON, K1N 6N5, Canada
| | - Adam J Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada.
- Department of Biology, University of Ottawa, 30 Marie Curie, Ottawa, ON, K1N 6N5, Canada.
- University of Ottawa Heart Institute, 40 Ruskin St, Ottawa, ON, K1Y 4W7, Canada.
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15
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Brun EMSPT, Calvert ND, Suchý M, Kirby A, Melkus G, Garipov R, Addison CL, Shuhendler AJ. Mapping vitamin B 6 metabolism by hydrazoCEST magnetic resonance imaging. Chem Commun (Camb) 2021; 57:10867-10870. [PMID: 34665184 DOI: 10.1039/d1cc03704h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new CEST-MRI contrast agent, 2-HYNIC, capable of sensing aromatic aldehydes is reported. Pyridoxal 5'-phosphate, a key Vitamin B6 metabolite necessary for >140 biotransformations was mapped by CEST-MRI in vitro and in vivo in lung cancer. 2-HYNIC provided access to this key biomarker associated with a variety of human diseases.
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Affiliation(s)
- Emilie Marie Sophie Patit-Tha Brun
- Dept. Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada. .,University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Nicholas David Calvert
- Dept. Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada. .,University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Mojmír Suchý
- Dept. Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada. .,University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Alexia Kirby
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada.,Dept. Biology, University of Ottawa, Ottawa, Ontario, Canada
| | - Gerd Melkus
- Dept. Medical Imaging, The Ottawa Hospital, Ottawa, ON, Canada.,Dept. Radiology, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Christina L Addison
- Cancer Therapeutics Program, Ottawa Hospital Research Institute, Ottawa, Canada.,Dept. Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Canada.,Dept. Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Adam J Shuhendler
- Dept. Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada. .,University of Ottawa Heart Institute, Ottawa, Ontario, Canada.,Dept. Biology, University of Ottawa, Ottawa, Ontario, Canada
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16
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Suchý M, Charlton TA, Ben RN, Shuhendler AJ. Synthesis of natural/ 13C-enriched d-tagatose from natural/ 13C-enriched d-fructose. Carbohydr Res 2021; 507:108377. [PMID: 34303197 DOI: 10.1016/j.carres.2021.108377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/08/2021] [Accepted: 06/14/2021] [Indexed: 10/21/2022]
Abstract
A concise, easily scalable synthesis of a rare ketohexose, d-tagatose, was developed, that is compatible with the preparation of d-[UL-13C6]tagatose. Epimerization of the widely available and inexpensive ketohexose d-fructose at the C-4 position via an oxidation/reduction (Dess-Martin periodinane/NaBH4) was a key step in the synthesis. Overall, fully protected natural d-tagatose (3.21 g) was prepared from d-fructose (9 g) on a 50 mmol scale in 23% overall yield, after five steps and two chromatographic purifications. d-[UL-13C6]Tagatose (92 mg) was prepared from d-[UL-13C6]fructose (465 mg, 2.5 mmol) in 16% overall yield after six steps and four chromatographic purifications.
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Affiliation(s)
- Mojmír Suchý
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada; University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Thomas A Charlton
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Robert N Ben
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Adam J Shuhendler
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada; University of Ottawa Heart Institute, Ottawa, Ontario, Canada.
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17
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Cranston RR, Vebber MC, Berbigier JF, Rice NA, Tonnelé C, Comeau ZJ, Boileau NT, Brusso JL, Shuhendler AJ, Castet F, Muccioli L, Kelly TL, Lessard BH. Thin-Film Engineering of Solution-Processable n-Type Silicon Phthalocyanines for Organic Thin-Film Transistors. ACS Appl Mater Interfaces 2021; 13:1008-1020. [PMID: 33370100 DOI: 10.1021/acsami.0c17657] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Metal and metalloid phthalocyanines are an abundant and established class of materials widely used in the dye and pigment industry as well as in commercial photoreceptors. Silicon phthalocyanines (SiPcs) are among the highest-performing n-type semiconductor materials in this family when used in organic thin-film transistors (OTFTs) as their performance and solid-state arrangement are often increased through axial substitution. Herein, we study eight axially substituted SiPcs and their integration into solution-processed n-type OTFTs. Electrical characterization of the OTFTs, combined with atomic force microscopy (AFM), determined that the length of the alkyl chain affects device performance and thin-film morphology. The effects of high-temperature annealing and spin coating time on film formation, two key processing steps for fabrication of OTFTs, were investigated by grazing-incidence wide-angle X-ray scattering (GIWAXS) and X-ray diffraction (XRD) to elucidate the relationship between thin-film microstructure and device performance. Thermal annealing was shown to change both film crystallinity and SiPc molecular orientation relative to the substrate surface. Spin time affected film crystallinity, morphology, and interplanar d-spacing, thus ultimately modifying device performance. Of the eight materials studied, bis(tri-n-butylsilyl oxide) SiPc exhibited the greatest electron field-effect mobility (0.028 cm2 V-1 s-1, a threshold voltage of 17.6 V) of all reported solution-processed SiPc derivatives.
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Affiliation(s)
- Rosemary R Cranston
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
| | - Mário C Vebber
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
| | - Jônatas Faleiro Berbigier
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK, Canada S7N 5C9
| | - Nicole A Rice
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
| | - Claire Tonnelé
- Donostia International Physics Center, 4 Paseo Manuel de Lardizabal, 20018 Donostia, Euskadi, Spain
| | - Zachary J Comeau
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
| | - Nicholas T Boileau
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
| | - Jaclyn L Brusso
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
| | - Adam J Shuhendler
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
| | - Frédéric Castet
- Institut des Sciences Moléculaires, Université de Bordeaux, 351 Cours de la Libération, 33405 Talence, France
| | - Luca Muccioli
- Institut des Sciences Moléculaires, Université de Bordeaux, 351 Cours de la Libération, 33405 Talence, France
- Department of Industrial Chemistry, University of Bologna, 4 Viale Risorgimento, 40136 Bologna, Italy
| | - Timothy L Kelly
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK, Canada S7N 5C9
| | - Benoît H Lessard
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, Canada K1N 6N5
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Ave. Ottawa, ON, Canada K1N 6N5
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18
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Suchý M, Kirby A, Sabloff T, Mulvihill EE, Shuhendler AJ. Dansyl–NA 3 conjugates for glycoprotein detection through fluorescent tagging and native gel electrophoresis. NEW J CHEM 2021. [DOI: 10.1039/d1nj02393d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An aldehyde-reactive fluorophore has been prepared that can afford the fluorescent detection of serum glycoproteins by native gel electrophoresis.
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Affiliation(s)
- Mojmír Suchý
- Department of Chemistry & Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
| | - Alexia Kirby
- Department of Chemistry & Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
| | - Tara Sabloff
- Department of Chemistry & Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - Erin E. Mulvihill
- University of Ottawa Heart Institute
- Ottawa
- Canada
- Department of Biochemistry, Microbiology and Immunology
- University of Ottawa
| | - Adam J. Shuhendler
- Department of Chemistry & Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
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19
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Comeau ZJ, Facey GA, Harris CS, Shuhendler AJ, Lessard BH. Engineering Cannabinoid Sensors through Solution-Based Screening of Phthalocyanines. ACS Appl Mater Interfaces 2020; 12:50692-50702. [PMID: 33125212 DOI: 10.1021/acsami.0c17146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Organic thin-film transistors (OTFTs) have shown promise for a range of sensing applications, with phthalocyanine-based OTFTs demonstrated as sensors for atmospheric parameters, volatile gases, and small organic molecules including cannabinoids. However, the process of fabricating, testing, and optimizing OTFTs in a laboratory setting requires highly specialized equipment, materials, and expertise. To determine if sensor development can be expedited and thus reduce manufacturing burden, spectroelectrochemistry is applied to rapidly screen for molecular interactions between metal-free phthalocyanines and a variety of metal phthalocyanines (MPcs) and the cannabinoids Δ9-tetrahydrocannabinol (THC) or cannabidiol (CBD), with and without a cannabinoid-sensitive chromophore (Fast Blue BB). Spectral analyses are corroborated by 2D-NMR and related to measured OTFT performance. Spectroelectrochemical changes to the Q band region of the phthalocyanine spectra in the presence of analytes can be used to predict the response of OTFTs. Thus, with spectroelectrochemistry, a range of potential materials for OTFT small organic molecule-sensing applications can be quickly analyzed, and phthalocyanines with a preferred response can be selected.
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Affiliation(s)
- Zachary J Comeau
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Pvt, Ottawa, Ontario K1N 6N5, Canada
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, 150 Louis-Pasteur Pvt, Ottawa, Ontario K1N 6N5, Canada
| | - Glenn A Facey
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, 150 Louis-Pasteur Pvt, Ottawa, Ontario K1N 6N5, Canada
| | - Cory S Harris
- Department of Biology, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Adam J Shuhendler
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, 150 Louis-Pasteur Pvt, Ottawa, Ontario K1N 6N5, Canada
- Department of Biology, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
- University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada
| | - Benoît H Lessard
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Pvt, Ottawa, Ontario K1N 6N5, Canada
- School of Electrical Engineering and Computer Science, University of Ottawa, 800 King Edward Ave. Ottawa, Ontario K1N 6N5, Canada
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20
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Comeau ZJ, Boileau NT, Lee T, Melville OA, Rice NA, Troung Y, Harris CS, Lessard BH, Shuhendler AJ. On-the-Spot Detection and Speciation of Cannabinoids Using Organic Thin-Film Transistors. ACS Sens 2019; 4:2706-2715. [PMID: 31453690 DOI: 10.1021/acssensors.9b01150] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Quality control is imperative for Cannabis since the primary cannabinoids, Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD), elicit very different pharmacological effects. THC/CBD ratios are currently determined by techniques not readily accessible by consumers or dispensaries and which are impractical for use in the field by law-enforcement agencies. CuPc- and F16-CuPc-based organic thin-film transistors have been combined with a cannabinoid-sensitive chromophore for the detection and differentiation of THC and CBD. The combined use of these well-characterized and inexpensive p- and n-type materials afforded the determination of the CBD/THC ratio from rapid plant extracts, with results indistinguishable from high-pressure liquid chromatography. Analysis of the prepyrolyzed sample accurately predicted postpyrolysis THC/CBD, which ultimately influences the psychotropic and medicinal effects of the specific plant. The devices were also capable of vapor-phase sensing, producing a unique electrical output for THC and CBD relative to other potentially interfering vaporized organic products. The analysis of complex medicinal plant extracts and vapors, normally reserved for advanced analytical infrastructure, can be achieved with ease, at low cost, and on the spot, using organic thin-film transistors.
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21
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Yan R, Hu Y, Liu F, Wei S, Fang D, Shuhendler AJ, Liu H, Chen HY, Ye D. Activatable NIR Fluorescence/MRI Bimodal Probes for in Vivo Imaging by Enzyme-Mediated Fluorogenic Reaction and Self-Assembly. J Am Chem Soc 2019; 141:10331-10341. [PMID: 31244188 DOI: 10.1021/jacs.9b03649] [Citation(s) in RCA: 203] [Impact Index Per Article: 40.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Stimuli-responsive in situ self-assembly of small molecules to form nanostructures in living subjects has produced promising tools for molecular imaging and tissue engineering. However, controlling the self-assembly process to simultaneously activate multimodality imaging signals in a small-molecule probe is challenging. In this paper, we rationally integrate a fluorogenic reaction into enzyme-responsive in situ self-assembly to design small-molecule-based activatable near-infrared (NIR) fluorescence and magnetic resonance (MR) bimodal probes for molecular imaging. Using alkaline phosphatase (ALP) as a model target, we demonstrate that probe (P-CyFF-Gd) can be activated by endogenous ALP overexpressed on cell membranes, producing membrane-localized assembled nanoparticles (NPs) that can be directly visualized by cryo-SEM. Simultaneous enhancements in NIR fluorescence (>70-fold at 710 nm) and r1 relaxivity (∼2.3-fold) enable real-time, high-sensitivity, high-spatial-resolution imaging and localization of the ALP activity in live tumor cells and mice. P-CyFF-Gd can also delineate orthotopic liver tumor foci, facilitating efficient real-time, image-guided surgical resection of tumor tissues in intraoperative mice. This strategy combines activatable NIR fluorescence via a fluorogenic reaction and activatable MRI via in situ self-assembly to promote ALP activity imaging, which could be applicable to design other activatable bimodal probes for in vivo imaging of enzyme activity and locations in real time.
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Affiliation(s)
- Runqi Yan
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Yuxuan Hu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Fei Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Shixuan Wei
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Daqing Fang
- State Key Laboratory of Drug Research and Key Laboratory of Receptor Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road , Shanghai 201203 , China
| | - Adam J Shuhendler
- Department of Chemistry & Biomolecular Sciences , University of Ottawa , Ottawa , ON K1N 6N5 , Canada
| | - Hong Liu
- State Key Laboratory of Drug Research and Key Laboratory of Receptor Research , Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road , Shanghai 201203 , China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Deju Ye
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China.,Research Center for Environmental Nanotechnology (ReCent) , Nanjing University , Nanjing , 210023 , China
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22
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Shuhendler AJ, Cui L, Chen Z, Shen B, Chen M, James ML, Witney TH, Bazalova-Carter M, Gambhir SS, Chin FT, Graves EE, Rao J. [ 18F]-SuPAR: A Radiofluorinated Probe for Noninvasive Imaging of DNA Damage-Dependent Poly(ADP-ribose) Polymerase Activity. Bioconjug Chem 2019; 30:1331-1342. [PMID: 30973715 DOI: 10.1021/acs.bioconjchem.9b00089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Poly(ADP ribose) polymerase (PARP) enzymes generate poly(ADP ribose) post-translational modifications on target proteins for an array of functions centering on DNA and cell stress. PARP isoforms 1 and 2 are critically charged with the surveillance of DNA integrity and are the first line guardians of the genome against DNA breaks. Here we present a novel probe ([18F]-SuPAR) for noninvasive imaging of PARP-1/2 activity using positron emission tomography (PET). [18F]-SuPAR is a radiofluorinated nicotinamide adenine dinucleotide (NAD) analog that can be recognized by PARP-1/2 and incorporated into the long branched polymers of poly(ADP ribose) (PAR). The measurement of PARP-1/2 activity was supported by a reduction of radiotracer uptake in vivo following PARP-1/2 inhibition with talazoparib treatment, a potent PARP inhibitor recently approved by FDA for treatment of breast cancer, as well as ex vivo colocalization of radiotracer analog and poly(ADP ribose). With [18F]-SuPAR, we were able to map the dose- and time-dependent activation of PARP-1/2 following radiation therapy in breast and cervical cancer xenograft mouse models. Tumor response to therapy was determined by [18F]-SuPAR PET within 8 h of administration of a single dose of radiation equivalent to one round of stereotactic ablative radiotherapy.
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23
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McCormick PN, Greenwood HE, Glaser M, Maddocks ODK, Gendron T, Sander K, Gowrishankar G, Hoehne A, Zhang T, Shuhendler AJ, Lewis DY, Berndt M, Koglin N, Lythgoe MF, Gambhir SS, Årstad E, Witney TH. Assessment of Tumor Redox Status through ( S)-4-(3-[ 18F]fluoropropyl)-L-Glutamic Acid PET Imaging of System x c - Activity. Cancer Res 2019; 79:853-863. [PMID: 30401715 PMCID: PMC6379064 DOI: 10.1158/0008-5472.can-18-2634] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/16/2018] [Accepted: 11/02/2018] [Indexed: 01/06/2023]
Abstract
The cell's endogenous antioxidant system is vital to maintenance of redox homeostasis. Despite its central role in normal and pathophysiology, no noninvasive tools exist to measure this system in patients. The cystine/glutamate antiporter system xc - maintains the balance between intracellular reactive oxygen species and antioxidant production through the provision of cystine, a key precursor in glutathione biosynthesis. Here, we show that tumor cell retention of a system xc --specific PET radiotracer, (S)-4-(3-[18F]fluoropropyl)-L-glutamic acid ([18F]FSPG), decreases in proportion to levels of oxidative stress following treatment with a range of redox-active compounds. The decrease in [18F]FSPG retention correlated with a depletion of intracellular cystine resulting from increased de novo glutathione biosynthesis, shown through [U-13C6, U-15N2]cystine isotopic tracing. In vivo, treatment with the chemotherapeutic doxorubicin decreased [18F]FSPG tumor uptake in a mouse model of ovarian cancer, coinciding with markers of oxidative stress but preceding tumor shrinkage and decreased glucose utilization. Having already been used in pilot clinical trials, [18F]FSPG PET could be rapidly translated to the clinic as an early redox indicator of tumor response to treatment. SIGNIFICANCE: [18F]FSPG PET imaging provides a sensitive noninvasive measure of tumor redox status and provides an early marker of tumor response to therapy.See related commentary by Lee et al., p. 701.
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Affiliation(s)
- Patrick N McCormick
- Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Hannah E Greenwood
- Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Matthias Glaser
- Institute of Nuclear Medicine and Department of Chemistry, University College London, London, United Kingdom
| | - Oliver D K Maddocks
- Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Thibault Gendron
- Institute of Nuclear Medicine and Department of Chemistry, University College London, London, United Kingdom
| | - Kerstin Sander
- Institute of Nuclear Medicine and Department of Chemistry, University College London, London, United Kingdom
| | - Gayatri Gowrishankar
- Department of Radiology, Molecular Imaging Program, Stanford University, Palo Alto, Stanford, California
| | - Aileen Hoehne
- Department of Radiology, Molecular Imaging Program, Stanford University, Palo Alto, Stanford, California
| | - Tong Zhang
- Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Adam J Shuhendler
- Department of Radiology, Molecular Imaging Program, Stanford University, Palo Alto, Stanford, California
| | - David Y Lewis
- Department of Radiology, Molecular Imaging Program, Stanford University, Palo Alto, Stanford, California
| | | | | | - Mark F Lythgoe
- Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Sanjiv S Gambhir
- Department of Radiology, Molecular Imaging Program, Stanford University, Palo Alto, Stanford, California
- Department of Bioengineering, Department of Materials Science and Engineering, Bio-X, Stanford University, Palo Alto, Stanford, California
| | - Erik Årstad
- Institute of Nuclear Medicine and Department of Chemistry, University College London, London, United Kingdom
| | - Timothy H Witney
- Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom.
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24
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Suchý M, Lazurko C, Kirby A, Dang T, Liu G, Shuhendler AJ. Methyl 5-MeO-N-aminoanthranilate, a minimalist fluorogenic probe for sensing cellular aldehydic load. Org Biomol Chem 2019; 17:1843-1853. [DOI: 10.1039/c8ob02255k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A minimalist fluorogenic probe is presented capable of the mapping of aldehydic load through live cell microscopy.
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Affiliation(s)
- Mojmír Suchý
- Department of Chemistry & Biomolecular Scences
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
| | - Caitlin Lazurko
- Department of Chemistry & Biomolecular Scences
- University of Ottawa
- Ottawa
- Canada
| | - Alexia Kirby
- Department of Biology
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
| | - Trina Dang
- Department of Chemistry & Biomolecular Scences
- University of Ottawa
- Ottawa
- Canada
| | - George Liu
- Department of Chemistry & Biomolecular Scences
- University of Ottawa
- Ottawa
- Canada
| | - Adam J. Shuhendler
- Department of Chemistry & Biomolecular Scences
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
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25
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Simmons DA, James ML, Belichenko NP, Semaan S, Condon C, Kuan J, Shuhendler AJ, Miao Z, Chin FT, Longo FM. TSPO-PET imaging using [18F]PBR06 is a potential translatable biomarker for treatment response in Huntington's disease: preclinical evidence with the p75NTR ligand LM11A-31. Hum Mol Genet 2018; 27:2893-2912. [PMID: 29860333 PMCID: PMC6077813 DOI: 10.1093/hmg/ddy202] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/04/2018] [Accepted: 05/21/2018] [Indexed: 12/11/2022] Open
Abstract
Huntington's disease (HD) is an inherited neurodegenerative disorder that has no cure. HD therapeutic development would benefit from a non-invasive translatable biomarker to track disease progression and treatment response. A potential biomarker is using positron emission tomography (PET) imaging with a translocator protein 18 kDa (TSPO) radiotracer to detect microglial activation, a key contributor to HD pathogenesis. The ability of TSPO-PET to identify microglial activation in HD mouse models, essential for a translatable biomarker, or therapeutic efficacy in HD patients or mice is unknown. Thus, this study assessed the feasibility of utilizing PET imaging with the TSPO tracer, [18F]PBR06, to detect activated microglia in two HD mouse models and to monitor response to treatment with LM11A-31, a p75NTR ligand known to reduce neuroinflammation in HD mice. [18F]PBR06-PET detected microglial activation in striatum, cortex and hippocampus of vehicle-treated R6/2 mice at a late disease stage and, notably, also in early and mid-stage symptomatic BACHD mice. After oral administration of LM11A-31 to R6/2 and BACHD mice, [18F]PBR06-PET discerned the reductive effects of LM11A-31 on neuroinflammation in both HD mouse models. [18F]PBR06-PET signal had a spatial distribution similar to ex vivo brain autoradiography and correlated with microglial activation markers: increased IBA-1 and TSPO immunostaining/blotting and striatal levels of cytokines IL-6 and TNFα. These results suggest that [18F]PBR06-PET is a useful surrogate marker of therapeutic efficacy in HD mice with high potential as a translatable biomarker for preclinical and clinical HD trials.
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Affiliation(s)
- Danielle A Simmons
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Michelle L James
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
- Department of Radiology, Molecular Imaging Program at Stanford, Stanford University, Stanford, CA, USA
| | - Nadia P Belichenko
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Sarah Semaan
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Christina Condon
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Jason Kuan
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Adam J Shuhendler
- Department of Radiology, Molecular Imaging Program at Stanford, Stanford University, Stanford, CA, USA
| | - Zheng Miao
- Department of Radiology, Molecular Imaging Program at Stanford, Stanford University, Stanford, CA, USA
| | - Frederick T Chin
- Department of Radiology, Molecular Imaging Program at Stanford, Stanford University, Stanford, CA, USA
| | - Frank M Longo
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
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26
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Dang T, Suchy M, Truong YJ, Oakden W, Lam WW, Lazurko C, Facey G, Stanisz GJ, Shuhendler AJ. Hydrazo-CEST: Hydrazone-Dependent Chemical Exchange Saturation Transfer Magnetic Resonance Imaging Contrast Agents. Chemistry 2018; 24:9148-9156. [PMID: 29645309 DOI: 10.1002/chem.201801671] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Indexed: 11/06/2022]
Abstract
The rapid formation of hydrazones under physiological conditions was exploited for the detection of aldehydes through chemical exchange saturation transfer magnetic resonance imaging (CEST-MRI). A metal-free, diamagnetic contrast agent derived from N-amino anthranilic acid was introduced, which selectively "turned-on" upon hydrazone formation through an effect termed Hydrazo-CEST. While the hydrazine form of the probe produced no CEST-MRI signal enhancement, the formation of the aryl hydrazone resulted in >20 % intensity decrease in the bulk water signal through the CEST effect, as measured by 300 MHz 1 H NMR, 3 T and 7 T MRI. Both the electronic contributions of the N-amino anthranilate and the aldehyde binding partner were shown to directly impact the exchange rate of the proton on the ring-proximal nitrogen, and thus the imaging signal. Additionally, the presence of the carboxylic acid moiety ortho to the hydrazine was necessary not only for contrast production, but also for rapid hydrazone formation and prolonged hydrazone product stability under physiological conditions. This work provided the first example of an MRI-based contrast agent capable of a "turn on" response upon reaction with bioactive aldehydes, and outlined both the structural and electronic requirements to expand on Hydrazo-CEST, a novel, hydrazone-dependent subtype of diamagnetic CEST-MRI.
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Affiliation(s)
- Trina Dang
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Mojmír Suchy
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.,University of Ottawa Heart Institute, Ottawa, ON, Canada
| | - Yen J Truong
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Wendy Oakden
- Department of Physical Sciences, Sunnybrook Research Institute, Toronto, ON, Canada
| | - Wilfred W Lam
- Department of Physical Sciences, Sunnybrook Research Institute, Toronto, ON, Canada
| | - Caitlin Lazurko
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Glenn Facey
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Greg J Stanisz
- Department of Physical Sciences, Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Biomedical Physics, University of Toronto, Toronto, ON, Canada.,Department of Neurosurgery and Pediatric Neurosurgery, Medical University, Lublin, Poland
| | - Adam J Shuhendler
- Department of Chemistry & Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada.,University of Ottawa Heart Institute, Ottawa, ON, Canada
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27
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Pamenter ME, Kirby AM, Shuhendler AJ. Sweet Success: Metabolic Substrate Adaptations To Acute Hypoxia In The Naked Mole Rat (Heterocephalus Glaber). FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.858.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Matthew E. Pamenter
- BiologyUniversity of OttawaOttawaONCanada
- uOttawa Brain and Mind Research InstituteUniversity of OttawaOttawaONCanada
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28
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James ML, Belichenko NP, Shuhendler AJ, Hoehne A, Andrews LE, Condon C, Nguyen TVV, Reiser V, Jones P, Trigg W, Rao J, Gambhir SS, Longo FM. [ 18F]GE-180 PET Detects Reduced Microglia Activation After LM11A-31 Therapy in a Mouse Model of Alzheimer's Disease. Theranostics 2017; 7:1422-1436. [PMID: 28529627 PMCID: PMC5436503 DOI: 10.7150/thno.17666] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 02/08/2017] [Indexed: 12/22/2022] Open
Abstract
Microglial activation is a key pathological feature of Alzheimer's disease (AD). PET imaging of translocator protein 18 kDa (TSPO) is a strategy to detect microglial activation in vivo. Here we assessed flutriciclamide ([18F]GE-180), a new second-generation TSPO-PET radiotracer, for its ability to monitor response to LM11A-31, a novel AD therapeutic in clinical trials. AD mice displaying pathology were treated orally with LM11A-31 for 3 months. Subsequent [18F]GE-180-PET imaging revealed significantly lower signal in cortex and hippocampus of LM11A-31-treated AD mice compared to those treated with vehicle, corresponding with decreased levels of TSPO immunostaining and microglial Iba1 immunostaining. In addition to detecting decreased microglial activation following LM11A-31 treatment, [18F]GE-180 identified activated microglia in AD mice with greater sensitivity than another second-generation TSPO radiotracer, [18F]PBR06. Together, these data demonstrate the promise of [18F]GE-180 as a potentially sensitive tool for tracking neuroinflammation in AD mice and for monitoring therapeutic modulation of microglial activation.
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Affiliation(s)
- Michelle L. James
- Department of Radiology, Stanford University, Stanford, 94305, USA
- Department of Neurology and Neurological Sciences, Stanford University, Stanford, 94305, USA
| | - Nadia P. Belichenko
- Department of Neurology and Neurological Sciences, Stanford University, Stanford, 94305, USA
| | | | - Aileen Hoehne
- Department of Radiology, Stanford University, Stanford, 94305, USA
| | | | - Christina Condon
- Department of Neurology and Neurological Sciences, Stanford University, Stanford, 94305, USA
| | - Thuy-Vi V. Nguyen
- Department of Neurology and Neurological Sciences, Stanford University, Stanford, 94305, USA
| | | | - Paul Jones
- GE Healthcare, Amersham HP7 9LL, United Kingdom
| | | | - Jianghong Rao
- Department of Radiology, Stanford University, Stanford, 94305, USA
| | | | - Frank M. Longo
- Department of Neurology and Neurological Sciences, Stanford University, Stanford, 94305, USA
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29
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Abstract
Integration of the two-photon excitation (TPE) technique and nanomaterials to construct TPE nanoparticle-based photosensitizers for PDT is summarized and reviewed.
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Affiliation(s)
- Yizhong Shen
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Adam J. Shuhendler
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - Deju Ye
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
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30
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Shuhendler AJ, Ye D, Brewer KD, Bazalova-Carter M, Lee KH, Kempen P, Dane Wittrup K, Graves EE, Rutt B, Rao J. Molecular Magnetic Resonance Imaging of Tumor Response to Therapy. Sci Rep 2015; 5:14759. [PMID: 26440059 PMCID: PMC4594000 DOI: 10.1038/srep14759] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/02/2015] [Indexed: 11/09/2022] Open
Abstract
Personalized cancer medicine requires measurement of therapeutic efficacy as early as possible, which is optimally achieved by three-dimensional imaging given the heterogeneity of cancer. Magnetic resonance imaging (MRI) can obtain images of both anatomy and cellular responses, if acquired with a molecular imaging contrast agent. The poor sensitivity of MRI has limited the development of activatable molecular MR contrast agents. To overcome this limitation of molecular MRI, a novel implementation of our caspase-3-sensitive nanoaggregation MRI (C-SNAM) contrast agent is reported. C-SNAM is triggered to self-assemble into nanoparticles in apoptotic tumor cells, and effectively amplifies molecular level changes through nanoaggregation, enhancing tissue retention and spin-lattice relaxivity. At one-tenth the current clinical dose of contrast agent, and following a single imaging session, C-SNAM MRI accurately measured the response of tumors to either metronomic chemotherapy or radiation therapy, where the degree of signal enhancement is prognostic of long-term therapeutic efficacy. Importantly, C-SNAM is inert to immune activation, permitting radiation therapy monitoring.
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Affiliation(s)
- Adam J Shuhendler
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,Departments of Radiology, Stanford, California 94305, USA
| | - Deju Ye
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,Departments of Radiology, Stanford, California 94305, USA
| | - Kimberly D Brewer
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,Departments of Radiology, Stanford, California 94305, USA
| | - Magdalena Bazalova-Carter
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,Radiation Oncology, Stanford, California 94305, USA
| | - Kyung-Hyun Lee
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,Departments of Radiology, Stanford, California 94305, USA
| | - Paul Kempen
- Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - K Dane Wittrup
- Department of Chemical Engineering, Department of Biological Engineering, and Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
| | - Edward E Graves
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,Radiation Oncology, Stanford, California 94305, USA
| | - Brian Rutt
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,Departments of Radiology, Stanford, California 94305, USA
| | - Jianghong Rao
- Molecular Imaging Program at Stanford, Stanford, California 94305, USA.,Departments of Radiology, Stanford, California 94305, USA
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31
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Pu K, Mei J, Jokerst JV, Hong G, Antaris AL, Chattopadhyay N, Shuhendler AJ, Kurosawa T, Zhou Y, Gambhir SS, Bao Z, Rao J. Diketopyrrolopyrrole-Based Semiconducting Polymer Nanoparticles for In Vivo Photoacoustic Imaging. Adv Mater 2015; 27:5184-90. [PMID: 26247171 PMCID: PMC4567488 DOI: 10.1002/adma.201502285] [Citation(s) in RCA: 246] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 06/26/2015] [Indexed: 05/18/2023]
Abstract
Diketopyrrolopyrrole-based semiconducting polymer nanoparticles with high photostability and strong photoacoustic brightness are designed and synthesized, which results in 5.3-fold photoacoustic signal enhancement in tumor xenografts after systemic administration.
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Affiliation(s)
- Kanyi Pu
- Molecular Imaging Program at Stanford Department of Radiology, School of Medicine, Stanford University, California 94305, USA
| | - Jianguo Mei
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Jesse V. Jokerst
- Molecular Imaging Program at Stanford Department of Radiology, School of Medicine, Stanford University, California 94305, USA
| | - Guosong Hong
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | | | - Niladri Chattopadhyay
- Molecular Imaging Program at Stanford Department of Radiology, School of Medicine, Stanford University, California 94305, USA
| | - Adam J. Shuhendler
- Molecular Imaging Program at Stanford Department of Radiology, School of Medicine, Stanford University, California 94305, USA
| | - Tadanori Kurosawa
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA
| | - Yan Zhou
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA
| | - Sanjiv S. Gambhir
- Molecular Imaging Program at Stanford Department of Radiology, School of Medicine, Stanford University, California 94305, USA
- Department of Bioengineering, Stanford California 94305, USA
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA
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Cheng J, Liu Q, Shuhendler AJ, Rauth AM, Wu XY. Optimizing the design and in vitro evaluation of bioreactive glucose oxidase-microspheres for enhanced cytotoxicity against multidrug resistant breast cancer cells. Colloids Surf B Biointerfaces 2015; 130:164-72. [PMID: 25896537 DOI: 10.1016/j.colsurfb.2015.04.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 03/31/2015] [Accepted: 04/01/2015] [Indexed: 01/11/2023]
Abstract
Glucose oxidase (GOX) encapsulated in alginate-chitosan microspheres (GOX-MS) was shown in our previous work to produce reactive oxygen species (ROS) in situ and exhibit anticancer effects in vitro and in vivo. The purpose of present work was to optimize the design and thus enhance the efficacy of GOX-MS against multidrug resistant (MDR) cancer cells. GOX-MS with different mean diameters of 4, 20 or 140 μm were prepared using an emulsification-internal gelation-adsorption-chitosan coating method with varying compositions and conditions. The GOX loading efficiency, loading level, relative bioactivity of GOX-MS, and GOX leakage were determined and optimal chitosan concentrations in the coating solution were identified. The influence of particle size on cellular uptake, ROS generation, cytotoxicity and their underlying mechanisms was investigated. At the same GOX dose and incubation time, smaller sized GOX-MS produced larger amounts of H2O2 in cell culture medium and greater cytotoxicity toward murine breast cancer MDR (EMT6/AR1.0) and wild type (EMT6/WT) cells. Fluorescence and confocal laser scanning microscopy revealed significant uptake of small sized (4 μm) GOX-MS by both MDR and WT cells, but no cellular uptake of large (140 μm) GOX-MS. The GOX-MS were equally effective in killing both MDR cells and WT cells. The cytotoxicity of the GOX formulations was positively correlated with membrane damage and lipid peroxidation. GOX-MS induced greater membrane damage and lipid peroxidation in MDR cells than the WT cells. These results suggest that the optimized, small micron-sized GOX-MS are highly effective against MDR breast cancer cells.
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Affiliation(s)
- Ji Cheng
- Advanced Pharmaceutics & Drug Delivery Laboratory, Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, Ontario, Canada M5S 3M2
| | - Qun Liu
- Advanced Pharmaceutics & Drug Delivery Laboratory, Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, Ontario, Canada M5S 3M2
| | - Adam J Shuhendler
- Advanced Pharmaceutics & Drug Delivery Laboratory, Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, Ontario, Canada M5S 3M2
| | - Andrew M Rauth
- Departments of Medical Biophysics and Radiation Oncology, University of Toronto, 610 University Ave, Toronto, Ontario, Canada M5G 2M9
| | - Xiao Yu Wu
- Advanced Pharmaceutics & Drug Delivery Laboratory, Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, Ontario, Canada M5S 3M2.
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Ye D, Shuhendler AJ, Pandit P, Brewer KD, Tee SS, Cui L, Tikhomirov G, Rutt B, Rao J. Caspase-responsive smart gadolinium-based contrast agent for magnetic resonance imaging of drug-induced apoptosis. Chem Sci 2014; 4:3845-3852. [PMID: 25429349 PMCID: PMC4241271 DOI: 10.1039/c4sc01392a] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Non-invasive detection of caspase-3/7 activity in vivo has provided invaluable predictive information regarding tumor therapeutic efficacy and anti-tumor drug selection. Although a number of caspase-3/7 targeted fluorescence and positron emission tomography (PET) imaging probes have been developed, there is still a lack of gadolinium (Gd)-based magnetic resonance imaging (MRI) probes that enable high spatial resolution detection of caspase-3/7 activity in vivo. Here we employ a self-assembly approach and develop a caspase-3/7 activatable Gd-based MRI probe for monitoring tumor apoptosis in mice. Upon reduction and caspase-3/7 activation, the caspase-sensitive nano-aggregation MR probe (C-SNAM: 1) undergoes biocompatible intramolecular cyclization and subsequent self-assembly into Gd-nanoparticles (GdNPs). This results in enhanced r1 relaxivity-19.0 (post-activation) vs. 10.2 mM-1 s-1 (pre-activation) at 1 T in solution-and prolonged accumulation in chemotherapy-induced apoptotic cells and tumors that express active caspase-3/7. We demonstrate that C-SNAM reports caspase-3/7 activity by generating a significantly brighter T1-weighted MR signal compared to non-treated tumors following intravenous administration of C-SNAM, providing great potential for high-resolution imaging of tumor apoptosis in vivo.
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Affiliation(s)
- Deju Ye
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
| | - Adam J. Shuhendler
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
| | - Prachi Pandit
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
| | - Kimberly D. Brewer
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
| | - Sui Seng Tee
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
| | - Lina Cui
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
| | - Grigory Tikhomirov
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
| | - Brian Rutt
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
| | - Jianghong Rao
- Molecular Imaging Program at Stanford, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
- Departments of Radiology Chemistry, Stanford University, 1201 Welch Road, Stanford, California 94305-5484, USA
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Pu K, Shuhendler AJ, Valta MP, Cui L, Saar M, Peehl DM, Rao J. Phosphorylcholine-coated semiconducting polymer nanoparticles as rapid and efficient labeling agents for in vivo cell tracking. Adv Healthc Mater 2014; 3:1292-8. [PMID: 24668903 PMCID: PMC4134769 DOI: 10.1002/adhm.201300534] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 02/24/2014] [Indexed: 12/19/2022]
Abstract
Despite the pressing need to noninvasively monitor transplanted cells in vivo with fluorescence imaging, desirable fluorescent agents with rapid labeling capability, durable brightness, and ideal biocompatibility remain lacking. Here, phosphorylcholine-coated near-infrared (NIR) fluorescent semiconducting polymer nanoparticles (SPNs) are reported as a new class of rapid, efficient, and cytocompatible labeling nanoagents for in vivo cell tracking. The phosphorylcholine coating results in efficient and rapid endocytosis and allows the SPN to enter cells within 0.5 h in complete culture medium apparently independent of the cell type, while its NIR fluorescence leads to a tissue penetration depth of 0.5 cm. In comparison to quantum dots and Cy5.5, the SPN is tolerant to physiologically ubiquitous reactive oxygen species (ROS), resulting in durable fluorescence both in vitro and in vivo. These desirable physical and physiological properties of the SPN permit cell tracking of human renal cell carcinoma (RCC) cells in living mice at a lower limit of detection of 10 000 cells with no obvious alteration of cell phenotype after 12 d. SPNs thus can provide unique opportunities for optimizing cellular therapy and deciphering pathological processes as a cell tracking label.
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Affiliation(s)
- Kanyi Pu
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, USA
| | - Adam J. Shuhendler
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, USA
| | - Maija P. Valta
- Department of Urology, School of Medicine, Stanford University, USA. Division of Medicine, Turku University Hospital and University of Turku, Finland
| | - Lina Cui
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, USA
| | - Matthias Saar
- Department of Urology School of Medicine, Stanford University, USA. Department of Urology and Pediatric Urology, University of Saarland, Homburg/Saar, Germany
| | - Donna M. Peehl
- Department of Urology School of Medicine, Stanford University, USA
| | - Jianghong Rao
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, USA
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Shuhendler AJ, Prasad P, Zhang RX, Amini MA, Sun M, Liu PP, Bristow RG, Rauth AM, Wu XY. Synergistic nanoparticulate drug combination overcomes multidrug resistance, increases efficacy, and reduces cardiotoxicity in a nonimmunocompromised breast tumor model. Mol Pharm 2014; 11:2659-74. [PMID: 24830351 DOI: 10.1021/mp500093c] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Anthracyclines, commonly employed for cancer chemotherapy, suffer from dose-limiting cardiotoxicity and poor efficacy due to multidrug resistance (MDR). We previously demonstrated that simultaneous delivery of the synergistic drugs doxorubicin (DOX) and mitomycin C (MMC) by polymer-lipid hybrid nanoparticles (PLN) circumvented MDR, increased efficacy, and reduced cardiotoxicity in immuncompromised mice superior to poly(ethylene glycol)-coated (PEGylated) lipososmal DOX (PLD). Herein it is shown that the DOX-MMC combination was also synergistic in MDR EMT6/AR1 murine breast cancer cells and that their nanoparticle formulations were able to overcome the MDR phenotype. In contrast PLD exhibited little or no effect on the MDR cells. For the first time, these differences in in vitro efficacy are shown to be strongly correlated with cellular uptake and intracellular distribution of DOX brought about by DOX formulations (e.g., free solution, PLN vs PLD). To take into consideration the role of an intact immune system and tumor stroma in the response of host and tumor to chemotherapy, use was made of nonimmunocomprised mouse models to study the dose tolerance, cardiotoxicity, and efficacy of DOX-MMC coloaded PLN (DMsPLN) compared to PLD. DMsPLN treatment at 50 mg/m(2) DOX and 17 mg/m(2) of MMC singly or once every 4 days for 4 cycles were well tolerated by the mice without elevated systemic toxicity blood markers or myocardial damage. In contrast, PLD was limited to a single treatment due to significant total weight loss. The DMsPLN treatment delayed tumor growth up to 312% and 28% in EMT6/WT and EMT6/AR1 models, respectively. This work supports the translational value of DMsPLN for the aggressive management of either naïve or anthracycline-resistant tumors.
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Affiliation(s)
- Adam J Shuhendler
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto , Toronto, Ontario M5S 3M2, Canada
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Ye D, Shuhendler AJ, Cui L, Tong L, Tee SS, Tikhomirov G, Felsher DW, Rao J. Bioorthogonal cyclization-mediated in situ self-assembly of small-molecule probes for imaging caspase activity in vivo. Nat Chem 2014; 6:519-26. [PMID: 24848238 PMCID: PMC4031611 DOI: 10.1038/nchem.1920] [Citation(s) in RCA: 340] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 03/13/2014] [Indexed: 02/06/2023]
Abstract
Directed self-assembly of small molecules in living systems could enable a myriad of applications in biology and medicine, and it has been widely used to synthesize supramolecules and nano/microstructures in solution and in living cells. However, controlling self-assembly of synthetic small molecules in living animals is challenging because of the complex and dynamic in vivo physiological environment. Here we employed an optimized first-order bioorthogonal cyclization reaction to control self-assembly of a fluorescent small molecule, and demonstrated its in vivo applicability by imaging of casapae-3/7 activity in human tumor xenograft mouse models of chemotherapy. The in situ assembled fluorescent nanoparticles have been successfully imaged in both apoptotic cells and tumor tissues using three-dimensional structured illumination microscopy. This strategy combines the advantages offered by small molecules with those of nanomaterials and should find widespread use for non-invasive imaging of enzyme activity in vivo.
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Affiliation(s)
- Deju Ye
- 1] Molecular Imaging Program at Stanford, Departments of Radiology and Chemistry, Stanford University, Stanford, California 94305-5484, USA [2]
| | - Adam J Shuhendler
- 1] Molecular Imaging Program at Stanford, Departments of Radiology and Chemistry, Stanford University, Stanford, California 94305-5484, USA [2]
| | - Lina Cui
- Molecular Imaging Program at Stanford, Departments of Radiology and Chemistry, Stanford University, Stanford, California 94305-5484, USA
| | - Ling Tong
- Departments of Medicine and Pathology, Division of Oncology, School of Medicine Stanford University, Stanford, California, 94305-5151, USA
| | - Sui Seng Tee
- Molecular Imaging Program at Stanford, Departments of Radiology and Chemistry, Stanford University, Stanford, California 94305-5484, USA
| | - Grigory Tikhomirov
- Molecular Imaging Program at Stanford, Departments of Radiology and Chemistry, Stanford University, Stanford, California 94305-5484, USA
| | - Dean W Felsher
- Departments of Medicine and Pathology, Division of Oncology, School of Medicine Stanford University, Stanford, California, 94305-5151, USA
| | - Jianghong Rao
- Molecular Imaging Program at Stanford, Departments of Radiology and Chemistry, Stanford University, Stanford, California 94305-5484, USA
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Pu K, Shuhendler AJ, Jokerst JV, Mei J, Gambhir SS, Bao Z, Rao J. Semiconducting polymer nanoparticles as photoacoustic molecular imaging probes in living mice. Nat Nanotechnol 2014; 9:233-9. [PMID: 24463363 PMCID: PMC3947658 DOI: 10.1038/nnano.2013.302] [Citation(s) in RCA: 855] [Impact Index Per Article: 85.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 12/10/2013] [Indexed: 05/12/2023]
Abstract
Photoacoustic imaging holds great promise for the visualization of physiology and pathology at the molecular level with deep tissue penetration and fine spatial resolution. To fully utilize this potential, photoacoustic molecular imaging probes have to be developed. Here, we introduce near-infrared light absorbing semiconducting polymer nanoparticles as a new class of contrast agents for photoacoustic molecular imaging. These nanoparticles can produce a stronger signal than the commonly used single-walled carbon nanotubes and gold nanorods on a per mass basis, permitting whole-body lymph-node photoacoustic mapping in living mice at a low systemic injection mass. Furthermore, the semiconducting polymer nanoparticles possess high structural flexibility, narrow photoacoustic spectral profiles and strong resistance to photodegradation and oxidation, enabling the development of the first near-infrared ratiometric photoacoustic probe for in vivo real-time imaging of reactive oxygen species--vital chemical mediators of many diseases. These results demonstrate semiconducting polymer nanoparticles to be an ideal nanoplatform for developing photoacoustic molecular probes.
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Affiliation(s)
- Kanyi Pu
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, Stanford, California, USA
| | - Adam J. Shuhendler
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, Stanford, California, USA
| | - Jesse V. Jokerst
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, Stanford, California, USA
| | - Jianguo Mei
- Department of Chemical Engineering, Stanford University, Stanford, California, USA
| | - Sanjiv S. Gambhir
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, Stanford, California, USA
- Department of Bioengineering and Department of Materials Science & Engineering, Stanford University, Stanford, California, USA
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, California, USA
| | - Jianghong Rao
- Molecular Imaging Program at Stanford, Department of Radiology, School of Medicine, Stanford University, Stanford, California, USA
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Pu K, Shuhendler AJ, Rao J. Semiconducting polymer nanoprobe for in vivo imaging of reactive oxygen and nitrogen species. Angew Chem Int Ed Engl 2013; 52:10325-9. [PMID: 23943508 DOI: 10.1002/anie.201303420] [Citation(s) in RCA: 195] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 07/14/2013] [Indexed: 12/26/2022]
Affiliation(s)
- Kanyi Pu
- Molecular Imaging Program at Stanford, Departments of Radiology and Chemistry, Stanford University, 1201 Welch Road, Stanford, CA 94305-5484 (USA)
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Pu K, Shuhendler AJ, Rao J. Semiconducting Polymer Nanoprobe for In Vivo Imaging of Reactive Oxygen and Nitrogen Species. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303420] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Xiong L, Shuhendler AJ, Rao J. Self-luminescing BRET-FRET near-infrared dots for in vivo lymph-node mapping and tumour imaging. Nat Commun 2013; 3:1193. [PMID: 23149738 PMCID: PMC3527090 DOI: 10.1038/ncomms2197] [Citation(s) in RCA: 184] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 10/10/2012] [Indexed: 12/22/2022] Open
Abstract
Strong autofluorescence from living tissues, and the scattering and absorption of short-wavelength light in living tissues, significantly reduce sensitivity of in vivo fluorescence imaging. These issues can be tackled by using imaging probes that emit in the near-infrared wavelength range. Here we describe self-luminescing near-infrared-emitting nanoparticles employing an energy transfer relay that integrates bioluminescence resonance energy transfer and fluorescence resonance energy transfer, enabling in vivo near-infrared imaging without external light excitation. Nanoparticles were 30-40 nm in diameter, contained no toxic metals, exhibited long circulation time and high serum stability, and produced strong near-infrared emission. Using these nanoparticles, we successfully imaged lymphatic networks and vasculature of xenografted tumours in living mice. The self-luminescing feature provided excellent tumour-to-background ratio (>100) for imaging very small tumours (2-3 mm in diameter). Our results demonstrate that these new nanoparticles are well suited to in vivo imaging applications such as lymph-node mapping and cancer imaging.
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Affiliation(s)
- Liqin Xiong
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, Stanford, California 94305-5484, USA
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Shuhendler AJ, Prasad P, Cai P, Hui KKW, Henderson JT, Rauth AM, Wu XY. Matrigel alters the pathophysiology of orthotopic human breast adenocarcinoma xenografts with implications for nanomedicine evaluation. Nanomedicine 2013; 9:795-805. [PMID: 23434679 DOI: 10.1016/j.nano.2013.01.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 01/07/2013] [Accepted: 01/26/2013] [Indexed: 11/18/2022]
Abstract
UNLABELLED Matrigel, a mouse sarcoma-derived basement membrane protein mixture, is frequently used to facilitate human tumor xenograft growth in rodents. Despite its known effects on tumor growth and metastasis, its impact on tumor pathophysiology and preclinical evaluation of nanomedicines in tumor xenografts has not been reported previously. Herein bilateral MDA435 tumors were established orthotopically with (Mat+) or without (Mat-) co-injection of Matrigel. Tumor perfusion, morphology and nanoparticle retention were evaluated. As compared to Mat- tumors, Mat+tumors exhibited enhanced vascular perfusion and lymphatic flow, greater blood vessel and lymphatic growth within the tumor core, and more deformation and collapse of lymphatics in tumor-associated lymph nodes. These changes were accompanied by reduced nanoparticle retention in Mat+tumors. The results suggest that Matrigel is not a passive medium for tumor growth, but rather significantly alters long-term tumor architecture. These findings have significant implications for the evaluation of therapeutic nanomedicine in xenograft mouse models. FROM THE CLINICAL EDITOR Matrigel is utilized in facilitating human tumor xenograft growth in rodents. The authors demonstrate that Matrigel is not a passive medium for tumor growth; instead it significantly alters long-term tumor architecture, with major implications in the evaluation of therapeutic nanomedicine in xenograft mouse models.
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Affiliation(s)
- Adam J Shuhendler
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
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Shuhendler AJ, Prasad P, Leung M, Rauth AM, Dacosta RS, Wu XY. A novel solid lipid nanoparticle formulation for active targeting to tumor α(v) β(3) integrin receptors reveals cyclic RGD as a double-edged sword. Adv Healthc Mater 2012. [PMID: 23184795 DOI: 10.1002/adhm.201200006] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The overexpression of α(v) β(3) integrin receptors on tumor cells and tumor vascular endothelium makes it a useful target for imaging, chemotherapy and anti-angiogenic therapy. However integrin-targeted delivery of therapeutics by nanoparticles have provided only marginal, if any, enhancement of therapeutic effect. This work was thus focused on the development of novel α(v) β(3) -targeted near infrared light-emitting solid lipid nanoparticles (SLN) through conjugation to the α(v) β(3) integrin-specific ligand cyclic Arg-Gly-Asp (cRGD), and the assessment of the effects of α(v) β(3) targeting on nanoparticle biodistribution. Since our previously developed non-targeted "stealth" SLN showed little hepatic accumulation, unlike most reported liposomes and micelles, they served as a reference for quantifying the effects of cRGD-conjugation on tumor uptake and whole animal biodistribution of SLN. Non-targeted SLN, actively targeted (RGD-SLN) and blocked RGD-SLN were prepared to contain near infrared quantum dots for live animal imaging. They were injected intravenously to nude mice bearing xenograft orthotopic human breast tumors or dorsal window chamber breast tumors. Tumor micropharmacokinetics of various SLN formulations were determined using intravital microscopy, and whole animal biodistribution was followed over time by optical imaging. The active tumor targeting with cRGD was found to be a "double-edged sword": while the specificity of RGD-SLN accumulation in tumor blood vessels and their tumor residence time increased, their distribution in the liver, spleen, and kidneys was significantly greater than the non-targeted SLN, leaving a smaller amount of nanoparticles in the tumor tissue. Nevertheless the enhanced specificity and retention of RGD-SLN in tumor neovasculature could make this novel formulation useful for tumor neovascular-specific therapies and imaging applications.
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Affiliation(s)
- Adam J Shuhendler
- Department of Pharmaceutical Sciences, Leslie L. Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada, M5S 3M2
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Roy M, Niu CJ, Chen Y, McVeigh PZ, Shuhendler AJ, Leung MK, Mariampillai A, DaCosta RS, Wilson BC. Estimation of minimum doses for optimized quantum dot contrast-enhanced vascular imaging in vivo. Small 2012; 8:1780-1792. [PMID: 22431228 DOI: 10.1002/smll.201102105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 12/12/2011] [Indexed: 05/31/2023]
Abstract
Quantum dot (QD) contrast-enhanced molecular imaging has potential for early cancer detection and image guided treatment, but there is a lack of quantitative image contrast data to determine optimum QD administered doses, affecting the feasibility, risk and cost of such procedures, especially in vivo. Vascular fluorescence contrast-enhanced imaging is performed on nude mice bearing dorsal skinfold window chambers, injected with 4 different QD solutions emitting in the visible and near infrared. Linear relationships are observed among the vascular contrast, injected contrast agent volume, and QD concentration in blood. Due primarily to differential light absorption by blood, the vasculature is optimally visualized when exciting in the 435-480 nm region in 81% of the cases (89 out of 110 regions of interest in 22 window chambers). The threshold dose, defined here as the quantity of injected nanoparticles required to yield a vascular target-to-autofluorescence ratio of 2, varies from 10.6 to 0.15 pmol g(-1) depending on the QD emission wavelength. The wavelength optimization maximum and broadband gain, defined as the ratio of threshold doses estimated for optimal and suboptimal (worst wavelength or broadband) spectral illumination, has average values of 4.5 and 1.9, respectively. This study demonstrates, for the first time, optimized QD imaging in vivo. It also proposes and validates a theoretical framework for QD dose estimation and quantifies the effects of blood absorption, QD emission wavelength, and vessel diameter relative to the threshold dose.
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Affiliation(s)
- Mathieu Roy
- Department of Medical Biophysics, University of Toronto, 610 University Ave., Toronto, Ontario, Canada
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Shuhendler AJ, Staruch R, Oakden W, Gordijo CR, Rauth AM, Stanisz GJ, Chopra R, Wu XY. Thermally-triggered 'off-on-off' response of gadolinium-hydrogel-lipid hybrid nanoparticles defines a customizable temperature window for non-invasive magnetic resonance imaging thermometry. J Control Release 2011; 157:478-84. [PMID: 21939700 DOI: 10.1016/j.jconrel.2011.09.061] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Revised: 09/05/2011] [Accepted: 09/06/2011] [Indexed: 01/22/2023]
Abstract
For effective and safe thermotherapy, real-time, accurate, three-dimensional tissue thermometry is required. Magnetic resonance imaging (MRI)-based thermometry in combination with current temperature responsive contrast agents only provides an 'off-on' signal at a certain temperature, not indicating temperature increases beyond the desired therapeutic levels. To overcome this limitation, a novel Gd-chelated hydrogel-lipid hybrid nanoparticle (HLN) formulation was developed that provides an 'off-on-off' signal defining a thermometric window for MR thermometry. Novel thermally responsive poly(N-isopropylacrylamide-co-acrylamide) (NIPAM-co-AM) hydrogel nanoparticles (<15 nm) with bisallylamidodiethylenetriaminetriacetic acid, a novel crosslinker with Gd(3+) chelation functionality, were synthesized. The Gd-hydrogel nanoparticles were encapsulated in a solid lipid nanoparticle matrix that prevented T(1)-weighted contrast signal enhancement. Melting of the matrix lipid freed the Gd-hydrogel nanoparticles into the bulk water and an 'off-on' contrast signal enhancement occurred. As the temperature was further increased to temperatures greater than, the volume phase transition temperature of the hydrogel nanoparticles, they collapsed and provided an 'on-off' signal diminution. Both the 'off-on' and the 'on-off' transition temperature could be tailored by changing the lipid matrix and altering the NIPAM/AM ratio in the hydrogel, respectively. This allowed MRI thermometry of different temperature windows using the Gd-HLN system.
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Affiliation(s)
- Adam J Shuhendler
- Department of Pharmaceutical Sciences, Leslie L. Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada M5S 3M2.
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Henderson EJ, Shuhendler AJ, Prasad P, Baumann V, Maier-Flaig F, Faulkner DO, Lemmer U, Wu XY, Ozin GA. Colloidally stable silicon nanocrystals with near-infrared photoluminescence for biological fluorescence imaging. Small 2011; 7:2507-16. [PMID: 21739601 DOI: 10.1002/smll.201100845] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2011] [Indexed: 05/14/2023]
Abstract
Luminescent silicon nanocrystals (ncSi) are showing great promise as photoluminescent tags for biological fluorescence imaging, with size-dependent emission that can be tuned into the near-infrared biological window and reported lack of toxicity. Here, colloidally stable ncSi with NIR photoluminescence are synthesized from (HSiO1.5)n sol-gel glasses and are used in biological fluorescence imaging. Modifications to the thermal processing conditions of (HSiO1.5)n sol-gel glasses, the development of new ncSi oxide liberation chemistry, and an appropriate alkyl surface passivation scheme lead to the formation of colloidally stable ncSi with photoluminescence centered at 955 nm. Water solubility and biocompatibility are achieved through encapsulation of the hydrophobic alkyl-capped ncSi within PEG-terminated solid lipid nanoparticles. Their applicability to biological imaging is demonstrated with the in-vitro fluorescence labelling of human breast tumor cells.
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Affiliation(s)
- Eric J Henderson
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada M5S 3H6
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Shuhendler AJ, Prasad P, Chan HKC, Gordijo CR, Soroushian B, Kolios M, Yu K, O'Brien PJ, Rauth AM, Wu XY. Hybrid quantum dot-fatty ester stealth nanoparticles: toward clinically relevant in vivo optical imaging of deep tissue. ACS Nano 2011; 5:1958-1966. [PMID: 21338075 DOI: 10.1021/nn103024b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Despite broad applications of quantum dots (QDs) in vitro, severe toxicity and dominant liver uptake have limited their clinical application. QDs that excite and emit in the ultraviolet and visible regions have limited in vivo applicability due to significant optical interference exerted by biological fluids and tissues. Hence we devised a new biocompatible hybrid fluorophore composed of near-infrared-emitting PbSe quantum dots encapsulated in solid fatty ester nanoparticles (QD-FEN) for in vivo imaging. The quantum yield and tissue penetration depth of the QD-FEN were characterized, and their biological fate was examined in a breast tumor-bearing animal model. It was found for the first time that chemical modification of the headgroup of QD-encapsulating organic fatty acids was a must as these groups quenched the photoluminescence of PbSe nanocrystals. The use of fatty esters enhanced aqueous quantum yields of PbSe QDs up to ∼45%, which was 50% higher than that of water-soluble PbSe nanocrystals in an aqueous medium. As a result, a greater than previously reported tissue penetration depth of fluorescence was recorded at 710 nm/840 nm excitation/emission wavelengths. The QD-FEN had much lower short-term cytotoxicity compared to nonencapsulated water-soluble QDs. More importantly, reduced liver uptake, increased tumor retention, lack of toxic response, and nearly complete clearance of QD-FEN from the tested animals was demonstrated. With a combination of near-infrared spectral properties, enhanced optical properties,and significantly improved biosafety profile, this novel hybrid nanoparticulate fluorophore system demonstrably provides real-time, deep-tissue fluorescent imaging of live animals, laying a foundation for further development toward clinical application.
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Affiliation(s)
- Adam J Shuhendler
- Leslie L. Dan Faculty of Pharmacy, University of Toronto, and Department of Medical Biophysics, University Health Network, Princess Margaret Hospital, 144 College Street, Toronto, Ontario, Canada, M5S 3M2
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Shuhendler AJ, Lee S, Siu M, Ondovcik S, Lam K, Alabdullatif A, Zhang X, Machado M, Einarson TR. Efficacy of Botulinum Toxin Type A for the Prophylaxis of Episodic Migraine Headaches: A Meta-analysis of Randomized, Double-Blind, Placebo-Controlled Trials. Pharmacotherapy 2009; 29:784-91. [DOI: 10.1592/phco.29.7.784] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shuhendler AJ, Cheung RY, Manias J, Connor A, Rauth AM, Wu XY. A novel doxorubicin-mitomycin C co-encapsulated nanoparticle formulation exhibits anti-cancer synergy in multidrug resistant human breast cancer cells. Breast Cancer Res Treat 2009; 119:255-69. [PMID: 19221875 DOI: 10.1007/s10549-008-0271-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2008] [Indexed: 11/25/2022]
Abstract
Anthracycline-containing treatment regimens are currently the most widely employed regimens for the management of breast cancer. These drug combinations are often designed based on non-cross resistance and minimal overlapping toxicity rather than drug synergism. Moreover, aggressive doses are normally used in chemotherapy to achieve a greater therapeutic benefit at the cost of more acute and long-term toxic effects. To increase chemotherapeutic efficacy while decreasing toxic effects, rational design of drug synergy-based regimens is needed. Our previous work showed a synergistic effect of doxorubicin (DOX) and mitomycin C (MMC) on murine breast cancer cells in vitro and improved efficacy and reduced systemic toxicity of DOX-loaded solid polymer-lipid hybrid nanoparticles (PLN) in animal models of breast cancer. Herein we have demonstrated true anticancer synergy of concurrently applied DOX and MMC, and have rationally designed PLN to effectively deliver this combination to multidrug resistant (MDR) MDA435/LCC6 human breast cancer cells. DOX-MMC co-loaded PLN were effective in killing MDR cells at 20-30-fold lower doses than the free drugs. This synergistic cell killing was correlated with enhanced induction of DNA double strand breaks that preceded apoptosis. Importantly, co-encapsulation of dual agents into a nanoparticle formulation was much more effective than concurrent application of single agent-containing PLN, demonstrating the requirement of simultaneous uptake of both drugs by the same cells to enhance the drug synergy. The rationally designed combination chemotherapeutic PLN can overcome multidrug resistance at a significantly lower dose than free drugs, exhibiting the potential to enhance chemotherapy and reduce the therapeutic limitations imposed by systemic toxicity.
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Affiliation(s)
- Adam J Shuhendler
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON M5S 3M2, Canada
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Abstract
The combination of doxorubicin and mitomycin C has been shown previously to result in supra-additive tumor cell killing in vitro in both murine and human breast cancer cells and in vivo against murine breast cancer cells. Median effect analysis was used to determine the significance and degree of interaction. The origin of this synergy was sought by evaluating the contribution of membrane efflux pump modulation, formaldehyde production, reactive oxygen species, DNA cross-linking, and DNA double-strand breaks to this effect. The interaction of mitomycin C and doxorubicin in vitro was found to be a true synergy whose mechanism was efflux pump-independent. DNA cross-links were only found to increase additively with co-administration of the drugs; however, a supra-additive increase in DNA double-strand breaks was observed. The results suggest that poisoning of topoisomerase IIalpha by doxorubicin may interact with drug-induced DNA cross-links to enhance the formation of DNA double-strand breaks. This interaction, together with glutathione depletion and mitomycin C-derived formaldehyde, may be the underlying mechanism(s) of the synergy observed between mitomycin C and doxorubicin.
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Affiliation(s)
- Adam J Shuhendler
- Leslie Dan Faculty of Pharmacy, University of Toronto, Ontario, Canada
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Li Y, Wong HL, Shuhendler AJ, Rauth AM, Wu XY. Molecular interactions, internal structure and drug release kinetics of rationally developed polymer–lipid hybrid nanoparticles. J Control Release 2008; 128:60-70. [DOI: 10.1016/j.jconrel.2008.02.014] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2007] [Revised: 02/10/2008] [Accepted: 02/18/2008] [Indexed: 11/28/2022]
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