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Moulahoum H, Ghorbanizamani F. The LOD paradox: When lower isn't always better in biosensor research and development. Biosens Bioelectron 2024; 264:116670. [PMID: 39151260 DOI: 10.1016/j.bios.2024.116670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 08/06/2024] [Accepted: 08/12/2024] [Indexed: 08/19/2024]
Abstract
Biosensor research has long focused on achieving the lowest possible Limits of Detection (LOD), driving significant advances in sensitivity and opening up new possibilities in analysis. However, this intense focus on low LODs may not always meet the practical needs or suit the actual uses of these devices. While technological improvements are impressive, they can sometimes overlook important factors such as detection range, ease of use, and market readiness, which are vital for biosensors to be effective in real-world applications. This review advocates for a balanced approach to biosensor development, emphasizing the need to align technological advancements with practical utility. We delve into various applications, including the detection of cancer biomarkers, pathology-related biomarkers, and illicit drugs, illustrating the critical role of LOD within these contexts. By considering clinical needs and broader design aspects like cost-effectiveness, sustainability, and regulatory compliance, we argue that integrating technical progress with practicality will enhance the impact of biosensors. Such an approach ensures that biosensors are not only technically sound but also widely useable and beneficial in real-world applications. Addressing the diverse analytical parameters alongside user expectations and market demands will likely maximize the real-world impact of biosensors.
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Affiliation(s)
- Hichem Moulahoum
- Biochemistry Department, Faculty of Science, Ege University, 35100, Izmir, Turkiye.
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2
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Yang K, Wang Q, Novoselov KS, Andreeva DV. A nanofluidic sensing platform based on robust and flexible graphene oxide/chitosan nanochannel membranes for glucose and urea detection. NANOSCALE HORIZONS 2023; 8:1243-1252. [PMID: 37461370 DOI: 10.1039/d3nh00203a] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
We present the development of a health-monitoring nanofluidic membrane utilizing biocompatible and biodegradable graphene oxide, chitosan, and graphene quantum dots. The nanoconfinement provided by graphene oxide nanolayers encapsulates chitosan molecules, allowing for their conformational changes and switchable hydrophobic-hydrophilic behavior in response to pH variations. This low-dimensional membrane operates as an array of nanofluidic channels that can release quantum dots upon pH change. The photoluminescence emission from quantum dots enables rapid and reliable optical visualization of pH changes, facilitating efficient human health monitoring. To ensure fouling prevention and enable multiple usages, we adopt a design approach that avoids direct contact between biomarkers and the nanochannels. This design strategy, coupled with good mechanical properties (Young's modulus of 5.5 ± 0.7 GPa), preserves the integrity and functionality of the sensors for repeated sensing cycles. Furthermore, leveraging the memory effect, our sensors can be reloaded with graphene quantum dots multiple times without significant loss of selectivity, achieving reusability. The wide-ranging capabilities of 2D materials and stimuli-responsive polymers empower our sustainable approach to designing low-dimensional, robust, and flexible sensing materials. This approach allows for the integration of various biorecognition elements and signal transduction modes, expanding the versatility and applications of the designed materials.
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Affiliation(s)
- Kou Yang
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore.
- Institute for Functional Intelligent Materials, National University of Singapore, 117544, Singapore
| | - Qinyue Wang
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore.
- School of Materials Science and Engineering, Northwestern Polytechnical University, 710072, Shaanxi, China
| | - Kostya S Novoselov
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore.
- Institute for Functional Intelligent Materials, National University of Singapore, 117544, Singapore
| | - Daria V Andreeva
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore.
- Institute for Functional Intelligent Materials, National University of Singapore, 117544, Singapore
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Li F, Hong J, Guan C, Chen K, Xie Y, Wu Q, Chen J, Deng B, Shen J, Liu X, Hu R, Zhang Y, Chen Y, Zhu J. Affinity Exploration of SARS-CoV-2 RBD Variants to mAb-Functionalized Plasmonic Metasurfaces for Label-Free Immunoassay Boosting. ACS NANO 2023; 17:3383-3393. [PMID: 36630157 PMCID: PMC9847236 DOI: 10.1021/acsnano.2c08153] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 01/03/2023] [Indexed: 06/09/2023]
Abstract
Plasmonic metasurfaces (PMs) functionalized with the monoclonal antibody (mAb) are promising biophotonic sensors for biomolecular interaction analysis and convenient immunoassay of various biomarkers, such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants. Previous PM biosensing suffers from the slow affinity detection rate and lack of sufficient immunoassay studies on various SARS-CoV-2 variants. Here, we develop a high-efficiency affinity testing method based on label-free PM sensors with mAbs and demonstrate their binding characteristics to 12 spike receptor binding domain (RBD) variants of SARS-CoV-2. In addition to the research of plasmonic near-field influence on surface biomolecule sensing, we provide a comprehensive report about the Langmuir binding equilibrium of molecular kinetics between 12 SARS-CoV-2 RBD variants and mAb-functionalized PMs, which plays a crucial role in label-free immunosensing. A high-affinity mAb can be combined with the highly sensitive propagating plasmonic mode to boost the detection of SARS-CoV-2 variants. Owing to a better understanding of molecular dynamics on PMs, we develop an ultrasensitive biosensor of the SARS-CoV-2 Omicron variant. The experiments show great distinguishment of P < 0.0001 from respiratory diseases induced by other viruses, and the limit of detection is 2 orders smaller than the commercial colloidal gold immunoassay. Our study shows the label-free biosensing by low-cost wafer-scale PMs, which will provide essential information on biomolecular interaction and facilitate high-precision point-of-care testing for emerging SARS-CoV-2 variants in the future.
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Affiliation(s)
- Fajun Li
- Institute of Electromagnetics and Acoustics and Key
Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen
University, Xiamen361005, China
| | - Junping Hong
- State Key Laboratory of Molecular Vaccinology and
Molecular Diagnostics and National Institute of Diagnostics and Vaccine Development in
Infectious Diseases, School of Life Sciences, School of Public Health, Xiamen
University, Xiamen361005, China
| | - Chaoheng Guan
- Institute of Electromagnetics and Acoustics and Key
Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen
University, Xiamen361005, China
| | - Kaiyun Chen
- State Key Laboratory of Molecular Vaccinology and
Molecular Diagnostics and National Institute of Diagnostics and Vaccine Development in
Infectious Diseases, School of Life Sciences, School of Public Health, Xiamen
University, Xiamen361005, China
| | - Yinong Xie
- Institute of Electromagnetics and Acoustics and Key
Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen
University, Xiamen361005, China
| | - Qian Wu
- State Key Laboratory of Molecular Vaccinology and
Molecular Diagnostics and National Institute of Diagnostics and Vaccine Development in
Infectious Diseases, School of Life Sciences, School of Public Health, Xiamen
University, Xiamen361005, China
| | - Junjie Chen
- Analysis and Measurement Center, School of
Pharmaceutical Science, Xiamen University, Xiamen361003,
China
| | - Baichang Deng
- Institute of Electromagnetics and Acoustics and Key
Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen
University, Xiamen361005, China
| | - Jiaqing Shen
- Institute of Electromagnetics and Acoustics and Key
Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen
University, Xiamen361005, China
| | - Xueying Liu
- Institute of Electromagnetics and Acoustics and Key
Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen
University, Xiamen361005, China
| | - Rongsheng Hu
- Institute of Electromagnetics and Acoustics and Key
Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen
University, Xiamen361005, China
| | - Yulong Zhang
- Pen-Tung Sah Institute of Micro-Nano Science and
Technology, Xiamen University, Xiamen361005,
China
| | - Yixin Chen
- State Key Laboratory of Molecular Vaccinology and
Molecular Diagnostics and National Institute of Diagnostics and Vaccine Development in
Infectious Diseases, School of Life Sciences, School of Public Health, Xiamen
University, Xiamen361005, China
| | - Jinfeng Zhu
- Institute of Electromagnetics and Acoustics and Key
Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen
University, Xiamen361005, China
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Nimbkar S, Leena MM, Moses JA, Anandharamakrishnan C. Microfluidic assessment of nutritional biomarkers: Concepts, approaches and advances. Crit Rev Food Sci Nutr 2022; 64:5113-5127. [PMID: 36503314 DOI: 10.1080/10408398.2022.2150597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Among various approaches to understand the health status of an individual, nutritional biomarkers can provide valuable information, particularly in terms of deficiencies, if any, and their severity. Commonly, the approach revolves around molecular sciences, and the information gained can support prognosis, diagnosis, remediation, and impact assessment of therapies. Microfluidic platforms can offer benefits of low sample and reagent requirements, low cost, high precision, and lower detection limits, with simplicity in handling and the provision for complete automation and integration with information and communication technologies (ICTs). While several advances are being made, this work details the underlying concepts, with emphasis on different point-of-care devices for the analysis of macro and micronutrient biomarkers. In addition, the scope of using different wearable microfluidic sensors for real-time and noninvasive determination of biomarkers is detailed. While several challenges remain, a strong focus is given on recent advances, presenting the state-of-the-art of this field. With more such biomarkers being discovered and commercialization-driven research, trends indicate the wide prospects of this advancing field in supporting clinicians, food technologists, nutritionists, and others.
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Affiliation(s)
- Shubham Nimbkar
- Computational Modeling and Nanoscale Processing Unit, National Institute of Food Technology, Entrepreneurship and Management, Ministry of Food Processing Industries, Thanjavur, Tamil Nadu, India
| | - M Maria Leena
- Computational Modeling and Nanoscale Processing Unit, National Institute of Food Technology, Entrepreneurship and Management, Ministry of Food Processing Industries, Thanjavur, Tamil Nadu, India
| | - Jeyan Arthur Moses
- Computational Modeling and Nanoscale Processing Unit, National Institute of Food Technology, Entrepreneurship and Management, Ministry of Food Processing Industries, Thanjavur, Tamil Nadu, India
| | - Chinnaswamy Anandharamakrishnan
- Computational Modeling and Nanoscale Processing Unit, National Institute of Food Technology, Entrepreneurship and Management, Ministry of Food Processing Industries, Thanjavur, Tamil Nadu, India
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Chauhan N, Saxena K, Jain U. Single molecule detection; from microscopy to sensors. Int J Biol Macromol 2022; 209:1389-1401. [PMID: 35413320 DOI: 10.1016/j.ijbiomac.2022.04.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 03/31/2022] [Accepted: 04/05/2022] [Indexed: 01/31/2023]
Abstract
Single molecule detection is necessary to find out physical, chemical properties and their mechanism involved in the normal functioning of body cells. In this way, they can provide a new direction to the healthcare system. Various techniques have been developed and employed for their successful detection. Herein, we have emphasized various traditional methods as well as biosensing technology which offer single molecule sensitivity. The various methods including plasmonic resonance, nanopores, whispering gallery mode, Simoa assay and recognition tunneling are discussed in the initial part which has been followed by a discussion about biosensor-based detection. Plasmonic, SERS, CRISPR/Cas, and other types of biosensors are focused in this review and found to be highly sensitive for single molecule detection. This review provides an overview of progression in different techniques employed for single molecule detection.
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Affiliation(s)
- Nidhi Chauhan
- Amity Institute of Nanotechnology (AINT), Amity University Uttar Pradesh (AUUP), Noida 201313, U.P., India
| | - Kirti Saxena
- Amity Institute of Nanotechnology (AINT), Amity University Uttar Pradesh (AUUP), Noida 201313, U.P., India
| | - Utkarsh Jain
- Amity Institute of Nanotechnology (AINT), Amity University Uttar Pradesh (AUUP), Noida 201313, U.P., India.
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Thompson CJ, Kienle DF, Schwartz DK. Enhanced Facilitated Diffusion of Membrane-Associating Proteins under Symmetric Confinement. J Phys Chem Lett 2022; 13:2901-2907. [PMID: 35333540 DOI: 10.1021/acs.jpclett.2c00227] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The facilitated surface diffusion of transiently adsorbing molecules in a planar confined microenvironment (i.e., slit-like confinement) is highly relevant to biological phenomena, such as extracellular signaling, as well as numerous biotechnology systems. Here, we studied the surface diffusion of individual proteins confined between two symmetric lipid bilayer membranes, under a continuum of confinement heights, using single-molecule tracking and convex lens-induced confinement as well as hybrid, kinetic Monte Carlo simulations of a generalized continuous time random walk process. Surface diffusion was observed to vary non-monotonically with confinement height, exhibiting a maximum at a height of ∼750 nm, where diffusion was nearly 40% greater than that for a semi-infinite system. This demonstrated that planar confinement can, in fact, increase surface diffusion, qualitatively validating previous theoretical predictions. Simulations reproduced the experimental results and suggested that confinement enhancement of surface diffusion for symmetric systems is limited to cases where the adsorbate exhibits weak surface sticking.
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Affiliation(s)
- Connor J Thompson
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Daniel F Kienle
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Daniel K Schwartz
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
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Sathish S, Shen AQ. Toward the Development of Rapid, Specific, and Sensitive Microfluidic Sensors: A Comprehensive Device Blueprint. JACS AU 2021; 1:1815-1833. [PMID: 34841402 PMCID: PMC8611667 DOI: 10.1021/jacsau.1c00318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Indexed: 05/04/2023]
Abstract
Recent advances in nano/microfluidics have led to the miniaturization of surface-based chemical and biochemical sensors, with applications ranging from environmental monitoring to disease diagnostics. These systems rely on the detection of analytes flowing in a liquid sample, by exploiting their innate nature to react with specific receptors immobilized on the microchannel walls. The efficiency of these systems is defined by the cumulative effect of analyte detection speed, sensitivity, and specificity. In this perspective, we provide a fresh outlook on the use of important parameters obtained from well-characterized analytical models, by connecting the mass transport and reaction limits with the experimentally attainable limits of analyte detection efficiency. Specifically, we breakdown when and how the operational (e.g., flow rates, channel geometries, mode of detection, etc.) and molecular (e.g., receptor affinity and functionality) variables can be tailored to enhance the analyte detection time, analytical specificity, and sensitivity of the system (i.e., limit of detection). Finally, we present a simple yet cohesive blueprint for the development of high-efficiency surface-based microfluidic sensors for rapid, sensitive, and specific detection of chemical and biochemical analytes, pertinent to a variety of applications.
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Affiliation(s)
- Shivani Sathish
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate
University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Amy Q. Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate
University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
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Dahlin A. Biochemical Sensing with Nanoplasmonic Architectures: We Know How but Do We Know Why? ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2021; 14:281-297. [PMID: 33761272 DOI: 10.1146/annurev-anchem-091420-090751] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Here, the research field of nanoplasmonic sensors is placed under scrutiny, with focus on affinity-based detection using refractive index changes. This review describes how nanostructured plasmonic sensors can deliver unique advantages compared to the established surface plasmon resonance technique, where a planar metal surface is used. At the same time, it shows that these features are actually only useful in quite specific situations. Recent trends in the field are also discussed and some devices that claim extraordinary performance are questioned. It is argued that the most important challenges are related to limited receptor affinity and nonspecific binding rather than instrumental performance. Although some nanoplasmonic sensors may be useful in certain situations, it seems likely that conventional surface plasmon resonance will continue to dominate biomolecular interaction analysis. For detection of analytes in complex samples, plasmonics may be an important tool, but probably not in the form of direct refractometric detection.
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Affiliation(s)
- Andreas Dahlin
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden;
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Plasmonic Biosensors for Single-Molecule Biomedical Analysis. BIOSENSORS-BASEL 2021; 11:bios11040123. [PMID: 33921010 PMCID: PMC8071374 DOI: 10.3390/bios11040123] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/18/2021] [Accepted: 04/13/2021] [Indexed: 11/16/2022]
Abstract
The rapid spread of epidemic diseases (i.e., coronavirus disease 2019 (COVID-19)) has contributed to focus global attention on the diagnosis of medical conditions by ultrasensitive detection methods. To overcome this challenge, increasing efforts have been driven towards the development of single-molecule analytical platforms. In this context, recent progress in plasmonic biosensing has enabled the design of novel detection strategies capable of targeting individual molecules while evaluating their binding affinity and biological interactions. This review compiles the latest advances in plasmonic technologies for monitoring clinically relevant biomarkers at the single-molecule level. Functional applications are discussed according to plasmonic sensing modes based on either nanoapertures or nanoparticle approaches. A special focus was devoted to new analytical developments involving a wide variety of analytes (e.g., proteins, living cells, nucleic acids and viruses). The utility of plasmonic-based single-molecule analysis for personalized medicine, considering technological limitations and future prospects, is also overviewed.
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