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Kissell LN, Liu H, Sheokand M, Vang D, Kachroo P, Strobbia P. Direct Detection of Tobacco Mosaic Virus in Infected Plants with SERS-Sensing Hydrogels. ACS Sens 2024; 9:514-523. [PMID: 38195409 DOI: 10.1021/acssensors.3c02537] [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: 01/11/2024]
Abstract
The impact of plant pathogens on global crop yields is a major societal concern. The current agricultural diagnostic paradigm involves either visual inspection (inaccurate) or laboratory molecular tests (burdensome). While field-ready diagnostic methods have advanced in recent years, issues remain with detection of presymptomatic infections, multiplexed analysis, and requirement for in-field sample processing. To overcome these issues, we developed surface-enhanced Raman scattering (SERS)-sensing hydrogels that detect pathogens through simple contact with a leaf. In this work, we developed a novel reagentless SERS sensor for the detection of tobacco mosaic virus (TMV) and embedded it in an optimized hydrogel material to produce sensing hydrogels. To test the diagnostic application of our sensing hydrogels, we demonstrate their use to detect TMV infection in tobacco plants. This technology has the potential to shift the current agricultural diagnostic paradigm by offering a field-deployable tool for presymptomatic and multiplexed molecular identification of pathogens.
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Affiliation(s)
- Lyndsay N Kissell
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Huazhen Liu
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546, United States
| | - Manisha Sheokand
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Der Vang
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Pradeep Kachroo
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky 40546, United States
| | - Pietro Strobbia
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
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Confederat S, Lee S, Vang D, Soulias D, Marcuccio F, Peace TI, Edwards MA, Strobbia P, Samanta D, Wälti C, Actis P. Next-Generation Nanopore Sensors Based on Conductive Pulse Sensing for Enhanced Detection of Nanoparticles. Small 2024; 20:e2305186. [PMID: 37649152 DOI: 10.1002/smll.202305186] [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] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/28/2023] [Indexed: 09/01/2023]
Abstract
Nanopore sensing has been successfully used to characterize biological molecules with single-molecule resolution based on the resistive pulse sensing approach. However, its use in nanoparticle characterization has been constrained by the need to tailor the nanopore aperture size to the size of the analyte, precluding the analysis of heterogeneous samples. Additionally, nanopore sensors often require the use of high salt concentrations to improve the signal-to-noise ratio, which further limits their ability to study a wide range of nanoparticles that are unstable at high ionic strength. Here, a new paradigm in nanopore research that takes advantage of a polymer electrolyte system to comprise a conductive pulse sensing approach is presented. A finite element model is developed to explain the conductive pulse signals observed and compare these results with experiments. This system enables the analytical characterization of heterogeneous nanoparticle mixtures at low ionic strength . Furthermore, the wide applicability of the method is demonstrated by characterizing metallic nanospheres of varied sizes, plasmonic nanostars with various degrees of branching, and protein-based spherical nucleic acids with different oligonucleotide loadings. This system will complement the toolbox of nanomaterials characterization techniques to enable real-time optimization workflow for engineering a wide range of nanomaterials.
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Affiliation(s)
- Samuel Confederat
- Bragg Centre for Materials Research, University of Leeds, LS2 9JT, Leeds, UK
- School of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, LS2 9JT, Leeds, UK
| | - Seungheon Lee
- Department of Chemistry, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Der Vang
- Department of Chemistry, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Dimitrios Soulias
- Bragg Centre for Materials Research, University of Leeds, LS2 9JT, Leeds, UK
- School of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, LS2 9JT, Leeds, UK
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, OX1 3QZ, Oxford, UK
| | - Fabio Marcuccio
- Bragg Centre for Materials Research, University of Leeds, LS2 9JT, Leeds, UK
- School of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, LS2 9JT, Leeds, UK
- Faculty of Medicine, Imperial College London, SW7 2AZ, London, UK
| | - Timotheus I Peace
- Bragg Centre for Materials Research, University of Leeds, LS2 9JT, Leeds, UK
- School of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, LS2 9JT, Leeds, UK
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT, Leeds, UK
| | - Martin Andrew Edwards
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Pietro Strobbia
- Department of Chemistry, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Devleena Samanta
- Department of Chemistry, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Christoph Wälti
- Bragg Centre for Materials Research, University of Leeds, LS2 9JT, Leeds, UK
- School of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, LS2 9JT, Leeds, UK
| | - Paolo Actis
- Bragg Centre for Materials Research, University of Leeds, LS2 9JT, Leeds, UK
- School of Electronic and Electrical Engineering and Pollard Institute, University of Leeds, LS2 9JT, Leeds, UK
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Vang D, Strobbia P. Analysis of Nanostar Reshaping Kinetics for Optimal Substrate Fabrication. Appl Spectrosc 2023; 77:270-280. [PMID: 36172843 DOI: 10.1177/00037028221132525] [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] [Indexed: 06/16/2023]
Abstract
Gold nanostars (NS) are emerging as a versatile tool in surface-enhanced Raman scattering (SERS) applications because of their wide localized surface plasmon resonance (LSPR) tunability, simple synthesis procedure, and high SERS enhancement. These particles are commonly used in solutions with a stabilizing coating shell (e.g., thiolated molecules or silver shell). However, coatings cannot be used for the fabrication of SERS substrates as the NS have to interact with the substrate planar surface. Without coating, NS have been observed to change over time, leading to a hypochromic shift of the LSPR. To understand this shift, we synthesized surfactant-free gold NS with different spike morphologies and investigated their reshaping morphology and kinetics. Using TEM, the NS sharp spike features were observed to reshape over time. The kinetics of this process were analyzed and determined by monitoring the LSPR, which was observed to follow an exponential decay over time. We used an empirical fit for the LSPR-shift data as a function of time, which permits to predict the LSPR at a specific time based only on the initial LSPR (independently of the initial spike morphology). We show the effect of the LSPR on the SERS signal for the NS and how the SERS signal correlated to our prediction. Finally, we evaluated our approach by fabricating SERS substrates with immobilized NS and collecting the reflectance spectra. We were able to predict the substrate LSPR and aim for an optimal LSPR with an average 3% deviation. These new insights on NS reshaping can permit the fabrication of NS-based substrates with desirable optical/plasmonic properties.
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Affiliation(s)
- Der Vang
- Department of Chemistry, 2514University of Cincinnati, Cincinnati, Ohio, USA
| | - Pietro Strobbia
- Department of Chemistry, 2514University of Cincinnati, Cincinnati, Ohio, USA
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Nguyen J, Luk K, Vang D, Soto W, Vincent L, Robiner S, Saavedra R, Li Y, Gupta P, Gupta K. Morphine stimulates cancer progression and mast cell activation and impairs survival in transgenic mice with breast cancer. Br J Anaesth 2014; 113 Suppl 1:i4-13. [PMID: 24861561 DOI: 10.1093/bja/aeu090] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Morphine stimulates angiogenesis and cancer progression in mice. We investigated whether morphine influences tumour onset, development, and animal model survival, and whether µ-opioid receptor (MOR), lymphangiogenesis, mast cell activation, and substance P (SP) are associated with the tumour-promoting effects of morphine. METHODS Transgenic mice with a rat C3(1) simian virus 40 large tumour antigen fusion gene which demonstrate the developmental spectrum of human infiltrating ductal breast carcinoma were used. Mice were treated at different ages with clinically relevant doses of morphine or phosphate-buffered saline to determine the effect on tumour development and progression, and on mouse survival. Tumours were analysed for MOR, angiogenesis, lymphangiogenesis, SP, and mast cell activation by immunofluorescent- or laser scanning confocal-microscopy. Cytokine and SP levels were determined by enzyme-linked immunosorbent assay. RESULTS Morphine did not influence tumour development when given before the onset of tumour appearance, but significantly promoted progression of established tumours, and reduced survival. MOR-immunoreactivity (ir) was observed in larger but not in smaller tumours. Morphine treatment resulted in increased tumour angiogenesis, peri-tumoural lymphangiogenesis, mast cell activation, and higher levels of cytokines and SP in tumours. SP-ir co-localized with mast cells and elsewhere in the tumours. CONCLUSIONS Morphine does not affect the onset of tumour development, but it promotes growth of existing tumours, and reduces overall survival in mice. MOR may be associated with morphine-induced cancer progression, resulting in shorter survival. Mast cell activation by morphine may contribute to increased cytokine and SP levels, leading to cancer progression and refractory pain.
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Affiliation(s)
- J Nguyen
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - K Luk
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - D Vang
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - W Soto
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - L Vincent
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - S Robiner
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - R Saavedra
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - Y Li
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - P Gupta
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA Hematology/Oncology Section 111E, Minneapolis VA Healthcare System, One Veterans Drive, Minneapolis, MN 55417, USA
| | - K Gupta
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Vascular Biology Center, University of Minnesota, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, MN 55455, USA
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