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Cannon AE, Vanegas DC, Sabharwal T, Salmi ML, Wang J, Clark G, McLamore ES, Roux SJ. Polarized distribution of extracellular nucleotides promotes gravity-directed polarization of development in spores of Ceratopteris richardii. Front Plant Sci 2023; 14:1265458. [PMID: 37854113 PMCID: PMC10579945 DOI: 10.3389/fpls.2023.1265458] [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] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 09/18/2023] [Indexed: 10/20/2023]
Abstract
Gravity directs the polarization of Ceratopteris fern spores. This process begins with the uptake of calcium through channels at the bottom of the spore, a step necessary for the gravity response. Data showing that extracellular ATP (eATP) regulates calcium channels led to the hypothesis that extracellular nucleotides could play a role in the gravity-directed polarization of Ceratopteris spores. In animal and plant cells ATP can be released from mechanosensitive channels. This report tests the hypothesis that the polarized release of ATP from spores could be activated by gravity, preferentially along the bottom of the spore, leading to an asymmetrical accumulation of eATP. In order to carry out this test, an ATP biosensor was used to measure the [eATP] at the bottom and top of germinating spores during gravity-directed polarization. The [eATP] along the bottom of the spore averaged 7-fold higher than the concentration at the top. All treatments that disrupted eATP signaling resulted in a statistically significant decrease in the gravity response. In order to investigate the source of ATP release, spores were treated with Brefeldin A (BFA) and gadolinium trichloride (GdCl3). These treatments resulted in a significant decrease in gravity-directed polarization. An ATP biosensor was also used to measure ATP release after treatment with both BFA and GdCl3. Both of these treatments caused a significant decrease in [ATP] measured around spores. These results support the hypothesis that ATP could be released from mechanosensitive channels and secretory vesicles during the gravity-directed polarization of Ceratopteris spores.
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Affiliation(s)
- Ashley E. Cannon
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, United States
| | - Diana C. Vanegas
- Agricultural and Biological Engineering Department, The University of Florida, Gainesville, FL, United States
| | - Tanya Sabharwal
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, United States
| | - Mari L. Salmi
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, United States
| | - Jeffrey Wang
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, United States
| | - Greg Clark
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, United States
| | - Eric S. McLamore
- Agricultural and Biological Engineering Department, The University of Florida, Gainesville, FL, United States
| | - Stanley J. Roux
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, United States
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Hjort RG, Pola CC, Casso-Hartmann L, Vanegas DC, McLamore E, Gomes CL. Carbon dots using a household cleaning liquid as a dopant for iron detection in hydroponic systems. RSC Adv 2023; 13:17244-17252. [PMID: 37304770 PMCID: PMC10249360 DOI: 10.1039/d3ra01713c] [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: 03/15/2023] [Accepted: 05/30/2023] [Indexed: 06/13/2023] Open
Abstract
Iron (Fe) is a required micronutrient in plants for the production of chlorophyll and transport of oxygen. A commonly used surrogate for measuring nutrient levels is the measurement of electrical conductivity or total dissolved solids, but this technique is not selective towards any particular dissolved ion. In this study, using a conventional microwave, fluorescent carbon dots (CDs) are produced from glucose and a household cleaning product and applied towards monitoring dissolved ferric iron levels in hydroponic systems through fluorescent quenching. The produced particles have an average size of 3.19 ± 0.76 nm with a relatively high degree of oxygen surface groups. When using an excitation of 405 nm, a broad emission peak is centered at approximately 500 nm. A limit-of-detection of 0.196 ± 0.067 ppm (3.51 ± 1.21 μM) with minimal interference from common heavy metal quenchers and ions found in hydroponic systems was determined. Butterhead lettuce was grown while discretely monitoring iron levels via the CDs for three separate weeks of growth. The CDs displayed a non-significant difference (p > 0.05) in performance when compared to a standard method. These results along with a simple and relatively low-cost production method make the CDs in this study a promising tool for monitoring iron levels in hydroponic systems.
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Affiliation(s)
- Robert G Hjort
- Department of Mechanical Engineering, Iowa State University Ames IA 50011 USA +1 515 294 1138
| | - Cícero C Pola
- Department of Mechanical Engineering, Iowa State University Ames IA 50011 USA +1 515 294 1138
| | - Lisseth Casso-Hartmann
- Department of Environmental Engineering and Earth Sciences, Clemson University Clemson SC 29634 USA
- Interdisciplinary Group for Biotechnology Innovation and Ecosocial Change (BioNovo), Universidad del Valle Cali 76001 Colombia
| | - Diana C Vanegas
- Department of Environmental Engineering and Earth Sciences, Clemson University Clemson SC 29634 USA
- Interdisciplinary Group for Biotechnology Innovation and Ecosocial Change (BioNovo), Universidad del Valle Cali 76001 Colombia
| | - Eric McLamore
- Department of Environmental Engineering and Earth Sciences, Clemson University Clemson SC 29634 USA
- Agricultural Sciences Department, Clemson University Clemson SC 29634 USA
| | - Carmen L Gomes
- Department of Mechanical Engineering, Iowa State University Ames IA 50011 USA +1 515 294 1138
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McCourt KM, Cochran J, Abdelbasir SM, Carraway ER, Tzeng TRJ, Tsyusko OV, Vanegas DC. Potential Environmental and Health Implications from the Scaled-Up Production and Disposal of Nanomaterials Used in Biosensors. Biosensors (Basel) 2022; 12:1082. [PMID: 36551049 PMCID: PMC9775545 DOI: 10.3390/bios12121082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
Biosensors often combine biological recognition elements with nanomaterials of varying compositions and dimensions to facilitate or enhance the operating mechanism of the device. While incorporating nanomaterials is beneficial to developing high-performance biosensors, at the stages of scale-up and disposal, it may lead to the unmanaged release of toxic nanomaterials. Here we attempt to foster connections between the domains of biosensors development and human and environmental toxicology to encourage a holistic approach to the development and scale-up of biosensors. We begin by exploring the toxicity of nanomaterials commonly used in biosensor design. From our analysis, we introduce five factors with a role in nanotoxicity that should be considered at the biosensor development stages to better manage toxicity. Finally, we contextualize the discussion by presenting the relevant stages and routes of exposure in the biosensor life cycle. Our review found little consensus on how the factors presented govern nanomaterial toxicity, especially in composite and alloyed nanomaterials. To bridge the current gap in understanding and mitigate the risks of uncontrolled nanomaterial release, we advocate for greater collaboration through a precautionary One Health approach to future development and a movement towards a circular approach to biosensor use and disposal.
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Affiliation(s)
- Kelli M. McCourt
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29634, USA
- Global Alliance for Rapid Diagnostics (GARD), Michigan State University, East Lancing, MI 48824, USA
| | - Jarad Cochran
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546, USA
| | - Sabah M. Abdelbasir
- Central Metallurgical Research and Development Institute, P.O. Box 87, Helwan 11421, Egypt
| | - Elizabeth R. Carraway
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29634, USA
| | - Tzuen-Rong J. Tzeng
- Department of Biological Sciences, Clemson University, Clemson, SC 29634, USA
| | - Olga V. Tsyusko
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546, USA
| | - Diana C. Vanegas
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29634, USA
- Global Alliance for Rapid Diagnostics (GARD), Michigan State University, East Lancing, MI 48824, USA
- Interdisciplinary Group for Biotechnology Innovation and Ecosocial Change (BioNovo), Universidad del Valle, Cali 76001, Colombia
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Vélez-Torres I, Torres AM, Bernal-Galeano S, Muriel I, Moreno HF, Alzate Lozano S, Bahamon-Pinzon D, Vanegas DC. Afrocolombian Struggles for Food, Land, and Culture: The Case of El Tiple. Environ Eng Sci 2021; 38:340-354. [PMID: 34079207 PMCID: PMC8165472 DOI: 10.1089/ees.2020.0282] [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] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 02/20/2021] [Indexed: 06/12/2023]
Abstract
El Tiple is one of many marginalized Afrodescendant communities confined within a green desert located in the southwest region of Colombia. This green desert is most widely known as the second-largest sugarcane monoculture field in the Americas. Herein, we describe a transdisciplinary and participatory effort to understand agroindustrial expansion in the region through the lens of the El Tiple community. Using qualitative and quantitative methodologies, we characterized the socioenvironmental context of El Tiple in terms of ethnography, autoethnography, social cartography, and ethnobotany. We implemented a participatory approach to codevelop a technology-assisted strategy for strengthening the community's small-scale farming activities. Our contextual analysis results show systemic food dispossession, which arises from several factors, including dramatic land transformation, rapid depletion and contamination of natural assets, and biodiversity loss. All these factors are associated with the presence of bordering sugarcane plantations. In collaboration with community members, we designed, constructed, and analyzed a greenhouse hydroponic cultivation system as an actionable means to gradually restore local production of food and medicinal plants for the community. Our transdisciplinary and participatory approach demonstrates how academics can partner with vulnerable communities in the coproduction of knowledge and solutions to pressing social needs.
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Affiliation(s)
- Irene Vélez-Torres
- Environmental and Natural Resource Engineering, Universidad del Valle, Cali, Colombia
- Interdisciplinary Group for Biotechnology Innovation and Eco-social Change -BioNovo, Universidad del Valle, Cali, Colombia
| | - Alba Marina Torres
- Ecology and Diversity of Plants Research Group, Universidad del Valle, Cali, Colombia
- Department of Biology, Universidad del Valle, Cali, Colombia
| | | | - Ingrid Muriel
- Interdisciplinary Group for Biotechnology Innovation and Eco-social Change -BioNovo, Universidad del Valle, Cali, Colombia
| | - Hugo Farley Moreno
- Interdisciplinary Group for Biotechnology Innovation and Eco-social Change -BioNovo, Universidad del Valle, Cali, Colombia
- Black Community Council AfroTiple, El Tiple, Valle del Cauca, Colombia
| | | | - David Bahamon-Pinzon
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina, USA
| | - Diana C. Vanegas
- Interdisciplinary Group for Biotechnology Innovation and Eco-social Change -BioNovo, Universidad del Valle, Cali, Colombia
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina, USA
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Abdelbasir SM, McCourt KM, Lee CM, Vanegas DC. Waste-Derived Nanoparticles: Synthesis Approaches, Environmental Applications, and Sustainability Considerations. Front Chem 2020; 8:782. [PMID: 33110911 PMCID: PMC7488813 DOI: 10.3389/fchem.2020.00782] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 07/27/2020] [Indexed: 12/02/2022] Open
Abstract
For the past few decades, a plethora of nanoparticles have been produced through various methods and utilized to advance technologies for environmental applications, including water treatment, detection of persistent pollutants, and soil/water remediation, amongst many others. The field of materials science and engineering is increasingly interested in increasing the sustainability of the processes involved in the production of nanoparticles, which motivates the exploration of alternative inputs for nanoparticle production as well as the implementation of green synthesis techniques. Herein, we start by overviewing the general aspects of nanoparticle synthesis from industrial, electric/electronic, and plastic waste. We expand on critical aspects of waste identification as a viable input for the treatment and recovery of metal- and carbon-based nanoparticles. We follow-up by discussing different governing mechanisms involved in the production of nanoparticles, and point to potential inferences throughout the synthesis processes. Next, we provide some examples of waste-derived nanoparticles utilized in a proof-of-concept demonstration of technologies for applications in water quality and safety. We conclude by discussing current challenges from the toxicological and life-cycle perspectives that must be taken into consideration before scale-up manufacturing and implementation of waste-derived nanoparticles.
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Affiliation(s)
| | - Kelli M. McCourt
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, United States
| | - Cindy M. Lee
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, United States
- Department of Engineering and Science Education, Clemson University, Clemson, SC, United States
| | - Diana C. Vanegas
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, United States
- Interdisciplinary Group for Biotechnological Innovation and Ecosocial Change-BioNovo, Universidad del Valle, Cali, Colombia
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Morgan V, Casso-Hartmann L, Bahamon-Pinzon D, McCourt K, Hjort RG, Bahramzadeh S, Velez-Torres I, McLamore E, Gomes C, Alocilja EC, Bhusal N, Shrestha S, Pote N, Briceno RK, Datta SPA, Vanegas DC. Sensor-as-a-Service: Convergence of Sensor Analytic Point Solutions (SNAPS) and Pay-A-Penny-Per-Use (PAPPU) Paradigm as a Catalyst for Democratization of Healthcare in Underserved Communities. Diagnostics (Basel) 2020; 10:diagnostics10010022. [PMID: 31906350 PMCID: PMC7169468 DOI: 10.3390/diagnostics10010022] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 12/29/2019] [Accepted: 12/30/2019] [Indexed: 01/10/2023] Open
Abstract
In this manuscript, we discuss relevant socioeconomic factors for developing and implementing sensor analytic point solutions (SNAPS) as point-of-care tools to serve impoverished communities. The distinct economic, environmental, cultural, and ethical paradigms that affect economically disadvantaged users add complexity to the process of technology development and deployment beyond the science and engineering issues. We begin by contextualizing the environmental burden of disease in select low-income regions around the world, including environmental hazards at work, home, and the broader community environment, where SNAPS may be helpful in the prevention and mitigation of human exposure to harmful biological vectors and chemical agents. We offer examples of SNAPS designed for economically disadvantaged users, specifically for supporting decision-making in cases of tuberculosis (TB) infection and mercury exposure. We follow-up by discussing the economic challenges that are involved in the phased implementation of diagnostic tools in low-income markets and describe a micropayment-based systems-as-a-service approach (pay-a-penny-per-use—PAPPU), which may be catalytic for the adoption of low-end, low-margin, low-research, and the development SNAPS. Finally, we provide some insights into the social and ethical considerations for the assimilation of SNAPS to improve health outcomes in marginalized communities.
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Affiliation(s)
- Victoria Morgan
- Agricultural and Biological Engineering, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA; (V.M.); (E.M.); (S.P.A.D.)
| | - Lisseth Casso-Hartmann
- Natural Resources and Environmental Engineering, Universidad del Valle, Cali 760026, Colombia; (L.C.-H.); (I.V.-T.)
- Interdisciplinary Group for Biotechnological Innovation and Ecosocial Change BioNovo, Universidad del Valle, Cali 760026, Colombia
| | - David Bahamon-Pinzon
- Biosystems Engineering, Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29631, USA; (D.B.-P.); (K.M.)
| | - Kelli McCourt
- Biosystems Engineering, Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29631, USA; (D.B.-P.); (K.M.)
| | - Robert G. Hjort
- Mechanical Engineering, Iowa State University, Ames, IA 50011, USA; (R.G.H.); (C.G.)
| | - Sahar Bahramzadeh
- School of Computer Engineering, Azad University, Science and Research Branch, Saveh 11369, Iran;
| | - Irene Velez-Torres
- Natural Resources and Environmental Engineering, Universidad del Valle, Cali 760026, Colombia; (L.C.-H.); (I.V.-T.)
- Interdisciplinary Group for Biotechnological Innovation and Ecosocial Change BioNovo, Universidad del Valle, Cali 760026, Colombia
| | - Eric McLamore
- Agricultural and Biological Engineering, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA; (V.M.); (E.M.); (S.P.A.D.)
| | - Carmen Gomes
- Mechanical Engineering, Iowa State University, Ames, IA 50011, USA; (R.G.H.); (C.G.)
| | - Evangelyn C. Alocilja
- Global Alliance for Rapid Diagnostics, Michigan State University, East Lansing, MI 48824, USA; (E.C.A.); (N.B.)
- Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - Nirajan Bhusal
- Global Alliance for Rapid Diagnostics, Michigan State University, East Lansing, MI 48824, USA; (E.C.A.); (N.B.)
- School of Medical Sciences, Kathmandu University, Kathmandu 44600, Nepal
- Dhulikhel Hospital, Kathmandu University, Kavrepalanchok 45200, Nepal; (S.S.); (N.P.)
| | - Sunaina Shrestha
- Dhulikhel Hospital, Kathmandu University, Kavrepalanchok 45200, Nepal; (S.S.); (N.P.)
| | - Nisha Pote
- Dhulikhel Hospital, Kathmandu University, Kavrepalanchok 45200, Nepal; (S.S.); (N.P.)
| | - Ruben Kenny Briceno
- Global Alliance for Rapid Diagnostics, Michigan State University, East Lansing, MI 48824, USA; (E.C.A.); (N.B.)
- Instituto de Investigacion en Ciencia y Tecnologia, Universidad Cesar Vallejo, Trujillo 13100, Peru;
- Hospital Victor Lazarte Echegaray, Trujillo 13100, Peru
- Institute for Global Health, Michigan State University, East Lansing, MI 48824, USA
| | - Shoumen Palit Austin Datta
- Agricultural and Biological Engineering, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA; (V.M.); (E.M.); (S.P.A.D.)
- MIT Auto-ID Labs, Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- MDPnP Interoperability and Cybersecurity Labs, Biomedical Engineering Program, Department of Anesthesiology, Massachusetts General Hospital, Harvard Medical School, 65 Landsdowne Street, Cambridge, MA 02139, USA
- NSF Center for Robots and Sensors for Human Well-Being, Purdue University, 156 Knoy Hall, Purdue Polytechnic, West Lafayette, IN 47907, USA
| | - Diana C. Vanegas
- Interdisciplinary Group for Biotechnological Innovation and Ecosocial Change BioNovo, Universidad del Valle, Cali 760026, Colombia
- Biosystems Engineering, Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29631, USA; (D.B.-P.); (K.M.)
- Correspondence: ; Tel.: +1-864-656-1001
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Vanegas DC, Patiño L, Mendez C, Oliveira DAD, Torres AM, Gomes CL, McLamore ES. Laser Scribed Graphene Biosensor for Detection of Biogenic Amines in Food Samples Using Locally Sourced Materials. Biosensors (Basel) 2018; 8:E42. [PMID: 29695046 PMCID: PMC6023090 DOI: 10.3390/bios8020042] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/11/2018] [Accepted: 04/19/2018] [Indexed: 11/16/2022]
Abstract
In foods, high levels of biogenic amines (BA) are the result of microbial metabolism that could be affected by temperatures and storage conditions. Thus, the level of BA is commonly used as an indicator of food safety and quality. This manuscript outlines the development of laser scribed graphene electrodes, with locally sourced materials, for reagent-free food safety biosensing. To fabricate the biosensors, the graphene surface was functionalized with copper microparticles and diamine oxidase, purchased from a local supermarket; and then compared to biosensors fabricated with analytical grade materials. The amperometric biosensor exhibits good electrochemical performance, with an average histamine sensitivity of 23.3 µA/mM, a lower detection limit of 11.6 µM, and a response time of 7.3 s, showing similar performance to biosensors constructed from analytical grade materials. We demonstrated the application of the biosensor by testing total BA concentration in fish paste samples subjected to fermentation with lactic acid bacteria. Biogenic amines concentrations prior to lactic acid fermentation were below the detection limit of the biosensor, while concentration after fermentation was 19.24 ± 8.21 mg histamine/kg, confirming that the sensor was selective in a complex food matrix. The low-cost, rapid, and accurate device is a promising tool for biogenic amine estimation in food samples, particularly in situations where standard laboratory techniques are unavailable, or are cost prohibitive. This biosensor can be used for screening food samples, potentially limiting food waste, while reducing chances of foodborne outbreaks.
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Affiliation(s)
- Diana C Vanegas
- Department of Food Engineering, Universidad del Valle, Cali 760032, Colombia.
| | - Laksmi Patiño
- Department of Food Engineering, Universidad del Valle, Cali 760032, Colombia.
| | - Connie Mendez
- Department of Food Engineering, Universidad del Valle, Cali 760032, Colombia.
| | - Daniela Alves de Oliveira
- Department of Biological and Agricultural Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Alba M Torres
- Department of Biology, Universidad del Valle, Cali 760032, Colombia.
| | - Carmen L Gomes
- Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA.
| | - Eric S McLamore
- Department of Agricultural and Biological Engineering, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA.
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Vanegas DC, Gomes CL, Cavallaro ND, Giraldo‐Escobar D, McLamore ES. Emerging Biorecognition and Transduction Schemes for Rapid Detection of Pathogenic Bacteria in Food. Compr Rev Food Sci Food Saf 2017; 16:1188-1205. [DOI: 10.1111/1541-4337.12294] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 07/12/2017] [Accepted: 07/19/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Diana C. Vanegas
- Food Engineering Univ. del Valle 338 Ciudad Universitaria Meléndez Cali Colombia
| | - Carmen L. Gomes
- Biological & Agricultural Engineering Texas A&M Univ. 2117 TAMU, Scoates Hall 201 College Station TX 77843 U.S.A
| | - Nicholas D. Cavallaro
- Agricultural & Biological Engineering Univ. of Florida 1741 Museum Rd Gainesville FL 32606 U.S.A
| | | | - Eric S. McLamore
- Agricultural & Biological Engineering Univ. of Florida 1741 Museum Rd Gainesville FL 32606 U.S.A
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Vanegas DC, Clark G, Cannon AE, Roux S, Chaturvedi P, McLamore ES. A self-referencing biosensor for real-time monitoring of physiological ATP transport in plant systems. Biosens Bioelectron 2015; 74:37-44. [PMID: 26094038 DOI: 10.1016/j.bios.2015.05.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 05/09/2015] [Accepted: 05/09/2015] [Indexed: 01/28/2023]
Abstract
The objective of this study was to develop a self-referencing electrochemical biosensor for the direct measurement of ATP flux into the extracellular matrix by living cells/organisms. The working mechanism of the developed biosensor is based on the activity of glycerol kinase and glycerol-3-phosphate oxidase. A stratified bi-enzyme nanocomposite was created using a protein-templated silica sol gel encapsulation technique on top of graphene-modified platinum electrodes. The biosensor exhibited excellent electrochemical performance with a sensitivity of 2.4±1.8 nA/µM, a response time of 20±13 s and a lower detection limit of 1.3±0.7 nM. The self-referencing biosensor was used to measure exogenous ATP efflux by (i) germinating Ceratopteris spores and (ii) growing Zea mays L. roots. This manuscript demonstrates the first development of a non-invasive ATP micro-biosensor for the direct measurement of eATP transport in living tissues. Before this work, assays of eATP have not been able to record the temporally transient movement of ATP at physiological levels (nM and sub-nM). The method demonstrated here accurately measured [eATP] flux in the immediate vicinity of plant cells. Although these proof of concept experiments focus on plant tissues, the technique developed herein is applicable to any living tissue, where nanomolar concentrations of ATP play a critical role in signaling and development. This tool will be invaluable for conducting hypothesis-driven life science research aimed at understanding the role of ATP in the extracellular environment.
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Affiliation(s)
- Diana C Vanegas
- Agricultural and Biological Engineering Department, University of Florida, Gainesville, USA; Food Engineering Department, Universidad del Valle, Cali, Colombia
| | - Greg Clark
- Department of Molecular Biosciences, University of Texas, Austin, USA
| | - Ashley E Cannon
- Department of Molecular Biosciences, University of Texas, Austin, USA
| | - Stanley Roux
- Department of Molecular Biosciences, University of Texas, Austin, USA
| | - Prachee Chaturvedi
- Department of Mechanical Engineering, University of Colorado, Denver, USA
| | - Eric S McLamore
- Agricultural and Biological Engineering Department, University of Florida, Gainesville, USA.
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Marvasi M, Durie IA, McLamore ES, Vanegas DC, Chaturvedi P. Salmonella enterica biofilm-mediated dispersal by nitric oxide donors in association with cellulose nanocrystal hydrogels. AMB Express 2015; 5:28. [PMID: 26020015 PMCID: PMC4441645 DOI: 10.1186/s13568-015-0114-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 05/04/2015] [Indexed: 11/10/2022] Open
Abstract
Protected by extracellular polymers, microbes within biofilms are significantly more resistant to disinfectants. Current research has been instrumental in identifying nitric oxide donors and hydrogels as potential disinfectant additives. Nitric oxide (NO) donors are considered a very promising molecule as biofilm dispersal agents and hydrogels have recently attracted a lot of interest due to their biocompatible properties and ability to form stable thin films. When the NO donor MAHMA NONOate was dissolved in phosphate saline buffer, it was able to reduce the biomass of well-established biofilms up to 15% for at least 24 h of contact time. Encapsulation of MAHMA NONOate and molsidomine within a hydrogel composed of cellulose nanocrystals (CNC) has shown a synergistic effect in dispersing well-established biofilms: after 2 h of exposure, moderate but significant dispersion was measured. After 6 h of exposure, the number of cells transitioning from the biofilm to the planktonic state was up to 0.6 log higher when compared with non-treated biofilms. To further explore the transport processes of NO donors within hydrogels, we measured the nitric oxide flux from gels, at 25°C for a composite of 0.1 µM MAHMA NONOate-CNC. Nitric oxide diffuses up to 500 µm from the hydrogel surface, with flux decreasing according to Fick's law. 60% of NO was released from the hydrogel composite during the first 23 min. These data suggest that the combined treatments with nitric oxide donor and hydrogels may allow for new sustainable cleaning strategies.
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Burrs SL, Vanegas DC, Rong Y, Bhargava M, Mechulan N, Hendershot P, Yamaguchi H, Gomes C, McLamore ES. A comparative study of graphene-hydrogel hybrid bionanocomposites for biosensing. Analyst 2015; 140:1466-76. [PMID: 25612313 DOI: 10.1039/c4an01788a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Hydrogels have become increasingly popular as immobilization materials for cells, enzymes and proteins for biosensing applications. Enzymatic biosensors that utilize hydrogel as an encapsulant have shown improvements over other immobilization techniques such as cross linking and covalent bonding. However, to date there are no studies which directly compare multiple hydrogel-graphene nanocomposites using the same enzyme and test conditions. This study compares the performance of four different hydrogels used as protein encapsulants in a mediator-free biosensor based on graphene-nanometal-enzyme composites. Alcohol oxidase (AOx) was encapsulated in chitosan poly-N-isopropylacrylamide (PNIPAAM), silk fibroin or cellulose nanocrystals (CNC) hydrogels, and then spin coated onto a nanoplatinum-graphene modified electrode. The transduction mechanism for the biosensor was based on AOx-catalyzed oxidation of methanol to produce hydrogen peroxide. To isolate the effect(s) of stimulus response on biosensor behavior, all experiments were conducted at 25 °C and pH 7.10. Electroactive surface area (ESA), electrochemical impedance spectroscopy (EIS), sensitivity to methanol, response time, limit of detection, and shelf life were measured for each bionanocomposite. Chitosan and PNIPAAM had the highest sensitivity (0.46 ± 0.2 and 0.3 ± 0.1 μA mM(-1), respectively) and electroactive surface area (0.2 ± 0.06 and 0.2 ± 0.02 cm(2), respectively), as well as the fastest response time (4.3 ± 0.8 and 4.8 ± 1.1 s, respectively). Silk and CNC demonstrated lower sensitivity (0.09 ± 0.02 and 0.15 ± 0.03 μA mM(-1), respectively), lower electroactive surface area (0.12 ± 0.02 and 0.09 ± 0.03 cm(2), respectively), and longer response time (8.9 ± 2.1 and 6.3 ± 0.8 s, respectively). The high porosity of chitosan, PNIPAAM, and silk gels led to excellent transport, which was significantly better than CNC bionanocomposites. Electrochemical performance of CNC bionanocomposites were relatively poor, which may be linked to poor gel stability. The differences between the Chitosan/PNIPAAM group and the Silk/CNC group were statistically significant (p < 0.05) based on ANOVA. Each of these composites was within the range of other published devices in the literature, while some attributes were significantly improved (namely response time and shelf life). The main advantages of these hydrogel composites over other devices is that only one enzyme is required, all materials are non-toxic, the sensor does not require mediators/cofactors, and the shelf life and response time are significantly improved over other devices.
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Affiliation(s)
- S L Burrs
- Agricultural & Biological Engineering Department, University of Florida, 1741 Museum Road, Gainesville, FL, USA.
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Vanegas DC, Taguchi M, Chaturvedi P, Burrs S, Tan M, Yamaguchi H, McLamore ES. A comparative study of carbon–platinum hybrid nanostructure architecture for amperometric biosensing. Analyst 2014; 139:660-7. [DOI: 10.1039/c3an01718d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [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
This facile graph-onto methodology is highly efficient and competes with relatively complex graph-from synthesis of carbon–metal hybrid nanocomposites.
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Affiliation(s)
- Diana C. Vanegas
- Department of Agricultural & Biological Engineering
- University of Florida
- Gainesville, USA
- Department of Food Engineering
- Universidad del Valle
| | - Masashige Taguchi
- Department of Agricultural & Biological Engineering
- University of Florida
- Gainesville, USA
| | - Prachee Chaturvedi
- Department of Agricultural & Biological Engineering
- University of Florida
- Gainesville, USA
| | - Stephanie Burrs
- Department of Agricultural & Biological Engineering
- University of Florida
- Gainesville, USA
| | - Michael Tan
- Department of Mechanical and Aerospace Engineering
- University of Florida
- Gainesville, USA
| | - Hitomi Yamaguchi
- Department of Mechanical and Aerospace Engineering
- University of Florida
- Gainesville, USA
| | - Eric S. McLamore
- Department of Agricultural & Biological Engineering
- University of Florida
- Gainesville, USA
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