1
|
Rodríguez-Gómez FD, Monferrer D, Penon O, Rivera-Gil P. Implementing Horizon Scanning as a tool for the strategic development of regulatory guidelines for nanotechnology-enabled health products. Front Med (Lausanne) 2024; 10:1308047. [PMID: 38298514 PMCID: PMC10829765 DOI: 10.3389/fmed.2023.1308047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 12/26/2023] [Indexed: 02/02/2024] Open
Abstract
Strategic regulatory development is essential to ensure that new innovations in nanotechnology-enabled health products (NHPs) successfully reach the market and benefit patients. Currently, the lack of specific regulatory guidelines for NHPs is considered one of the primary causes of the so-called "valley of death" in these products, impacting both current and future advancements. In this study, we have implemented a methodology to anticipate key trends in NHP development and compare them with the current regulatory landscape applicable to NHPs. This methodology relies on Horizon Scanning, a tool commonly used by policymakers to foresee future needs and proactively shape a regulatory framework tailored to those needs. Through the application of this methodology, different trends in NHP have been identified, notably NHPs for drug delivery and dental applications. Furthermore, the most disruptive elements involve NHPs that are multicomposite and multifunctional, harnessing nano-scale properties to combine therapeutic and diagnostic purposes within a single product. When compared with the regulatory landscape, current regulations are gradually adapting to accommodate emerging trends, with specific guidelines being developed. However, for the most disruptive elements, multicomposite and multifunctional NHPs, their novelty still poses significant regulatory challenges, requiring a strategic development of guidelines by regulatory agencies to ensure their safe and effective integration into healthcare practices. This study underscores the importance of proactive regulatory planning to bridge the gap between NHP innovation and market implementation.
Collapse
Affiliation(s)
- Francisco D. Rodríguez-Gómez
- Asphalion SL, Barcelona, Spain
- Integrative Biomedical Materials and Nanomedicine Lab, Department of Medicine and Life Sciences, Universitat Pompeu Fabra, Barcelona Biomedicine Research Park (PRBB), Doctor Aiguader, Barcelona, Spain
| | | | | | - Pilar Rivera-Gil
- Integrative Biomedical Materials and Nanomedicine Lab, Department of Medicine and Life Sciences, Universitat Pompeu Fabra, Barcelona Biomedicine Research Park (PRBB), Doctor Aiguader, Barcelona, Spain
| |
Collapse
|
2
|
Guo Z, Yu G, Zhang Z, Han Y, Guan G, Yang W, Han MY. Intrinsic Optical Properties and Emerging Applications of Gold Nanostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2206700. [PMID: 36620937 DOI: 10.1002/adma.202206700] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 12/21/2022] [Indexed: 06/09/2023]
Abstract
The collective oscillation of free electrons at the nanoscale surface of gold nanostructures is closely modulated by tuning the size, shape/morphology, phase, composition, hybridization, assembly, and nanopatterning, along with the surroundings of the plasmonic surface located at a dielectric interface with air, liquid, and solid. This review first introduces the physical origin of the intrinsic optical properties of gold nanostructures and further summarizes stimuli-responsive changes in optical properties, metal-field-enhanced optical signals, luminescence spectral shaping, chiroptical response, and photogenerated hot carriers. The current success in the landscape of nanoscience and nanotechnology mainly originates from the abundant optical properties of gold nanostructures in the thermodynamically stable face-centered cubic (fcc) phase. It has been further extended by crystal phase engineering to prepare thermodynamically unfavorable phases (e.g., kinetically stable) and heterophases to modulate their intriguing phase-dependent optical properties. A broad range of promising applications, including but not limited to full-color displays, solar energy harvesting, photochemical reactions, optical sensing, and microscopic/biomedical imaging, have fostered parallel research on the multitude of physical effects occurring in gold nanostructures.
Collapse
Affiliation(s)
- Zilong Guo
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Guo Yu
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Zhiguo Zhang
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Yandong Han
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Guijian Guan
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Wensheng Yang
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng, 475001, China
| | - Ming-Yong Han
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
- Institute of Materials Research and Engineering, 2 Fusionopolis Way, Singapore, 138634, Singapore
| |
Collapse
|
3
|
Xiao C, Izquierdo-Roca V, Rivera-Gil P. Real Time and Spatiotemporal Quantification of pH and H 2O 2 Imbalances with a Multiplex Surface-Enhanced Raman Spectroscopy Nanosensor. ACS MATERIALS AU 2023; 3:164-175. [PMID: 38089722 PMCID: PMC9999477 DOI: 10.1021/acsmaterialsau.2c00069] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/29/2022] [Accepted: 12/29/2022] [Indexed: 06/03/2024]
Abstract
Oxidative stress is involved in many aging-related pathological disorders and is the result of defective cellular management of redox reactions. Particularly, hydrogen peroxide (H2O2), is a major byproduct and a common oxidative stress biomarker. Monitoring its dynamics and a direct correlation to diseases remains a challenge due to the complexity of redox reactions. Sensitivity and specificity are major drawbacks for H2O2 sensors regardless of their readout. Luminiscent boronate-based probes such as 3-mercaptophenylboronic acid (3-MPBA) are emerging as the most effective quantitation tool due to their specificity and sensitivity. Problems associated with these probes are limited intracellular sensing, water solubility, selectivity, and quenching. We have synthesized a boronate-based nanosensor with a surface-enhanced Raman spectroscopy (SERS) readout to solve these challenges. Furthermore, we found out that environmental pH gradients, as found in biological samples, affect the sensitivity of boronate-based sensors. When the sensor is in an alkaline environment, the oxidation of 3-MPBA by H2O2 is more favored than in an acidic environment. This leads to different H2O2 measurements depending on pH. To solve this issue, we synthesized a multiplex nanosensor capable of concomitantly quantifying pH and H2O2. Our nanosensor first measures the local pH and based on this value, provides the amount of H2O2. It seems that this pH-dependent sensitivity effect applies to all boronic acid based probes. We tested the multiplexing ability by quantitatively measuring intra- and extracellular pH and H2O2 dynamics under physiological and pathological conditions on healthy cells and cells in which H+ and/or H2O2 homeostasis has been altered.
Collapse
Affiliation(s)
- Can Xiao
- Department
of Medicine and Life Sciences, Universitat
Pompeu Fabra, Carrer Doctor Aiguader 88, 08003 Barcelona, Spain
| | - Victor Izquierdo-Roca
- Catalonia
Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Sant Adrià del Besòs-Barcelona, Spain
| | - Pilar Rivera-Gil
- Department
of Medicine and Life Sciences, Universitat
Pompeu Fabra, Carrer Doctor Aiguader 88, 08003 Barcelona, Spain
| |
Collapse
|
4
|
Duan N, Yao T, Li C, Wang Z, Wu S. Surface-enhanced Raman spectroscopy relying on bimetallic Au–Ag nanourchins for the detection of the food allergen β-lactoglobulin. Talanta 2022; 245:123445. [DOI: 10.1016/j.talanta.2022.123445] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 03/31/2022] [Accepted: 04/02/2022] [Indexed: 01/04/2023]
|
5
|
Controlled nano-agglomerates as stabile SERS reporters for unequivocal labelling. Sci Rep 2022; 12:8977. [PMID: 35643864 PMCID: PMC9142785 DOI: 10.1038/s41598-022-12989-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 05/19/2022] [Indexed: 11/08/2022] Open
Abstract
Biosensors, especially those with a SERS readout, are required for an early and precise healthcare diagnosis. Unreproducible SERS platforms hamper clinical SERS. Here we report a synthetic procedure to obtain stabile, reproducible and robust highly-SERS performing nanocomposites for labelling. We controlled the NPs agglomeration and codification which resulted in an increased number of hot spots, thus exhibiting reproducible and superior Raman enhancement. We studied fundamental aspects affecting the plasmonic thiol bond resulting in pH exhibiting a determining role. We validated their biosensing performance by designing a SERS-based detection assay model for SARS-CoV-2. The limit of detection of our assay detecting the spike RBD was below 10 ng/mL.
Collapse
|
6
|
Chen S, Li Q, Tian D, Ke P, Yang X, Wu Q, Chen J, Hu C, Ji H. Assembly of long silver nanowires into highly aligned structure to achieve uniform "Hot Spots" for Surface-enhanced Raman scattering detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 273:121030. [PMID: 35189488 DOI: 10.1016/j.saa.2022.121030] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 02/08/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Silver nanowires (AgNWs) as a promising surface-enhanced Raman spectroscopy (SERS) substrate could be used in the analytical science due to its high sensitivity. However, it is difficult for the randomly-distributed silver nanowires to offer uniform "hot spots" to achieve the SERS signal reproducibility of small molecules detection. Herein, the evaporation-induced aggregation had been used to assemble long silver nanowires into highly aligned structure to achieve uniform "hot spots" for SERS detection. The normal glass slide with well-aligned silver nanowires could act as a high sensitivity and excellent reproducibility SERS substrate to provide a versatile platform for detecting analytes. Rhodamine 6G (R6G) is used to evaluate the sensitivity and reproducibility of these AgNWs SERS substrates. Even the low concentration of the R6G was 10-10 mol/L, the SERS features of R6G could be still observed clearly, and the uniform distribution of enhancement factor (EF) was higher than 0.8 × 104 accounting for about 75 % in the observed mapping area. Moreover, the relative standard deviation (RSD) of SERS intensity at the band of 610 cm-1 was used to estimate the signal reproducibility, and the calculated RSD value of aligned AgNWs substrate was about 3.6%, which was much higher than that of the randomly distributed AgNWs (26.8%) because of the highly aligned structure of silver nanowires with abundant and uniform inherent "hot spots". In addition, potential SERS detection of other small molecule, e.g. melamine was also demonstrated in the micromolar range.
Collapse
Affiliation(s)
- Shaoyun Chen
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, China
| | - Qi Li
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, China
| | - Du Tian
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, China
| | - Pai Ke
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, China
| | - Xinxin Yang
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, China
| | - Qingyun Wu
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, China
| | - Jian Chen
- Instrumental Analysis and Research Center, Sun Yat-sen University, Guangzhou 510275, China
| | - Chenglong Hu
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, China.
| | - Hongbing Ji
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China.
| |
Collapse
|
7
|
He Y, Wen M, Zhou X, Gao F, Lu H. Rapid Characterization of Proteinaceous Binders Used in Artwork and Cultural Heritage Materials by Surface-Enhanced Raman Spectroscopy (SERS). ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1948049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yujie He
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
| | - Ming Wen
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
| | - Xiao Zhou
- Chinese Academy of Cultural Heritage, Beijing, China
| | - Feng Gao
- Chinese Academy of Cultural Heritage, Beijing, China
| | - Hongmei Lu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, China
| |
Collapse
|
8
|
Demirci G, Muszyńska J, Cetinkaya O, Filipczak P, Zhang Y, Nowaczyk G, Halagan K, Ulanski J, Matyjaszewski K, Pietrasik J, Kozanecki M. Effective SERS materials by loading Ag nanoparticles into poly(acrylic acid-stat-acrylamide)-block-polystyrene nano-objects prepared by PISA. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
9
|
Sun Y, Li W, Zhao L, Li F, Xie Y, Yao W, Liu W, Lin Z. Simultaneous SERS detection of illegal food additives rhodamine B and basic orange II based on Au nanorod-incorporated melamine foam. Food Chem 2021; 357:129741. [PMID: 33878584 DOI: 10.1016/j.foodchem.2021.129741] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 03/10/2021] [Accepted: 03/31/2021] [Indexed: 01/31/2023]
Abstract
In food safety assessment, surface-enhanced Raman spectroscopy (SERS) is a novel detection method with the advantages of being fast, easy, and of high sensitivity. However, many SERS substrate synthesis methods are complex, and there are only a few studies on the simultaneous detection of multiple substances. In this study, a new, simple, low-cost SERS substrate was synthesised for the first time to simultaneously detect illegal food additives rhodamine B and basic orange II in chilli products. A lightweight, porous, and low-cost material of melamine foam (MF) was employed as the SERS synthesis template. The substrate's SERS effect on, and sensitivity to, rhodamine B and basic orange II were demonstrated. The molecular vibration and SERS enhancement mechanisms of the two target molecules were analysed by density functional theory (DFT) calculations. The results reveal that this fabricated substrate has great application potential for the supervision and testing industry.
Collapse
Affiliation(s)
- Yingying Sun
- Testing Innovation Research Center, Centre Testing International Group Co Ltd, Shenzhen 518000, China; Department of Food Science and Technology, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Wan Li
- Testing Innovation Research Center, Centre Testing International Group Co Ltd, Shenzhen 518000, China; Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Liqing Zhao
- Department of Food Science and Technology, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Fengyong Li
- Testing Innovation Research Center, Centre Testing International Group Co Ltd, Shenzhen 518000, China
| | - Yunfei Xie
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Weirong Yao
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenqiu Liu
- Testing Innovation Research Center, Centre Testing International Group Co Ltd, Shenzhen 518000, China
| | - Zhaosheng Lin
- Testing Innovation Research Center, Centre Testing International Group Co Ltd, Shenzhen 518000, China
| |
Collapse
|
10
|
Vu TD, Jang E, Lee J, Choi D, Chang J, Chung H. Feasibility of Voltage-Applied SERS Measurement of Bile Juice as an Effective Analytical Scheme to Enhance Discrimination between Gall Bladder (GB) Polyp and GB Cancer. Anal Chem 2020; 92:8159-8169. [PMID: 32402193 DOI: 10.1021/acs.analchem.0c00275] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A unique surface-enhanced Raman scattering (SERS) measurement scheme to discriminate gall bladder (GB) polyp and GB cancer by analysis of bile juice is proposed. Along with the high sensitivity of SERS, external voltage application during SERS measurement was incorporated to improve sample discriminability. For this purpose, Au nanodendrites were constructed on a screen-printed electrode (referred to as AuND@SPE), and Raman spectra of extracted aqueous phases from raw bile juice samples were acquired using the AuND@SPE at voltages from -300 to 300 mV. The sample spectra resembled that of bilirubin, possessing an open chain tetrapyrrole, showing that bilirubin derivatives in bile juice were mainly responsible for the observed peaks. Discrimination of GB polyp and GB cancer using just the normal SERS spectra was not achieved but became apparent when the spectra were acquired at a voltage of -100 mV. When voltage-applied SERS spectra of bilirubin and urobilinogen (one of bilirubin's derivatives) were examined, a sudden intensity elevation occurring at -100 mV was observed for urobilinogen but not bilirubin. Based on examination of corresponding cyclic voltammograms, the potential-driven strong adsorption of urobilinogen (no faradaic charge transfer) on AuND occurring at -100 mV induced a substantial increase in SERS intensity. It was presumed that the content of urobilinogen in the bile juice of a GB cancer patient would be higher than that of a GB polyp patient, and the contained urobilinogen was sensitively highlighted by applying -100 mV during SERS measurement, allowing clear discrimination of GB cancer against GB polyp.
Collapse
Affiliation(s)
- Tung Duy Vu
- Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul 04763, Republic of Korea
| | - Eunjin Jang
- Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul 04763, Republic of Korea
| | - Jihye Lee
- Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul 04763, Republic of Korea
| | - Dongho Choi
- Department of Surgery, College of Medicine, Hanyang University, Seoul 04763, Republic of Korea
| | - Jinho Chang
- Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul 04763, Republic of Korea
| | - Hoeil Chung
- Department of Chemistry and Research Institute for Convergence of Basic Science, Hanyang University, Seoul 04763, Republic of Korea
| |
Collapse
|
11
|
Dinish US, Beffara F, Humbert G, Auguste JL, Olivo M. Surface-enhanced Raman scattering-active photonic crystal fiber probe: Towards next generation liquid biopsy sensor with ultra high sensitivity. JOURNAL OF BIOPHOTONICS 2019; 12:e201900027. [PMID: 30891937 DOI: 10.1002/jbio.201900027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 03/17/2019] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
The tremendous enhancement factors that surface-enhanced Raman scattering (SERS) possesses coupled with the flexibility of photonic crystal fibers (PCFs) pave the way to a new generation of ultrasensitive biosensors. Thanks to the unique structure of PCFs, which allows direct incorporation of an analyte into the axially aligned air channels, interaction between the analyte and excitation light could be increased many folds leading to flexible, reliable and sensitive probes that can be used in preclinical or clinical biosensing. SERS-active PCF probes provide unique opportunity to develop an opto-fluidic liquid biopsy needle sensor that enables one-step integrated sample collection and testing for disease diagnosis. Specificity being a key parameter to biosensors, the PCF inside the biopsy needle could be functionalized with targeting moieties to detect specific biomarkers. In this review article, we present some of the most promising recent biosensors based on PCFs including hollow-core PCFs, suspended-core PCFs and side-channel PCFs. We provide a wide range of applications of such platform using Raman spectroscopy, label free SERS or labeled SERS detection and analyze some of the main challenges to be addressed for translating it to a clinically viable next generation sensitive biopsy needle sensing probe.
Collapse
Affiliation(s)
- U S Dinish
- Lab of Bio-Optical Imaging, Singapore Bioimaging Consortium (SBIC), Agency for Science Technology and Research (A*STAR), Singapore
| | - Flavien Beffara
- Lab of Bio-Optical Imaging, Singapore Bioimaging Consortium (SBIC), Agency for Science Technology and Research (A*STAR), Singapore
- XLIM Research Institute, UMR 7252 CNRS/Limoges University, Limoges, France
| | - Georges Humbert
- XLIM Research Institute, UMR 7252 CNRS/Limoges University, Limoges, France
| | - Jean-Louis Auguste
- XLIM Research Institute, UMR 7252 CNRS/Limoges University, Limoges, France
| | - Malini Olivo
- Lab of Bio-Optical Imaging, Singapore Bioimaging Consortium (SBIC), Agency for Science Technology and Research (A*STAR), Singapore
| |
Collapse
|
12
|
Luzhansky ID, Sudlow LC, Brogan DM, Wood MD, Berezin MY. Imaging in the repair of peripheral nerve injury. Nanomedicine (Lond) 2019; 14:2659-2677. [PMID: 31612779 PMCID: PMC6886568 DOI: 10.2217/nnm-2019-0115] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 08/20/2019] [Indexed: 12/25/2022] Open
Abstract
Surgical intervention followed by physical therapy remains the major way to repair damaged nerves and restore function. Imaging constitutes promising, yet underutilized, approaches to improve surgical and postoperative techniques. Dedicated methods for imaging nerve regeneration will potentially provide surgical guidance, enable recovery monitoring and postrepair intervention, elucidate failure mechanisms and optimize preclinical procedures. Herein, we present an outline of promising innovations in imaging-based tracking of in vivo peripheral nerve regeneration. We emphasize optical imaging because of its cost, versatility, relatively low toxicity and sensitivity. We discuss the use of targeted probes and contrast agents (small molecules and nanoparticles) to facilitate nerve regeneration imaging and the engineering of grafts that could be used to track nerve repair. We also discuss how new imaging methods might overcome the most significant challenges in nerve injury treatment.
Collapse
Affiliation(s)
- Igor D Luzhansky
- Department of Radiology, Washington University School of Medicine, St Louis, MO 63110, USA
- The Institute of Materials Science & Engineering, Washington University, St Louis, MO 63130, USA
| | - Leland C Sudlow
- Department of Radiology, Washington University School of Medicine, St Louis, MO 63110, USA
| | - David M Brogan
- Department of Orthopedic Surgery, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Matthew D Wood
- Department of Surgery, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Mikhail Y Berezin
- Department of Radiology, Washington University School of Medicine, St Louis, MO 63110, USA
- The Institute of Materials Science & Engineering, Washington University, St Louis, MO 63130, USA
| |
Collapse
|
13
|
Lee SW, Chen YW, Kuan EC, Lan MY. Dual-function nanostructured platform for isolation of nasopharyngeal carcinoma circulating tumor cells and EBV DNA detection. Biosens Bioelectron 2019; 142:111509. [PMID: 31344600 DOI: 10.1016/j.bios.2019.111509] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 07/11/2019] [Accepted: 07/12/2019] [Indexed: 12/19/2022]
Abstract
Circulating tumor cells (CTCs) and plasma levels of Epstein-Barr virus (EBV) DNA are sensitive prognostic tools for monitoring disease status in nasopharyngeal carcinoma (NPC) patients. Herein, we introduce a novel and low-cost platform for capturing CTCs, the Si nanowires/microscale pyramids (NWs/MPs) hierarchical substrate, which could capture NPC cells in vitro and also detect EBV DNA at very low concentrations. In this study, Si NWs/MPs hierarchical substrates with varying wire length were fabricated using a metal-assisted chemical etching method. Anti-EpCAM antibodies were further conjugated on the substrate for capturing NPC CTCs in vitro. Capture efficiency was evaluated using immunofluorescence and scanning electronic microscopy (SEM) was utilized to understand cell morphology. The Si NWs/MPs substrate was also transformed into a Surface enhanced Raman scattering (SERS) substrate by coating with Ag nanoparticles (AgNPs) for detection of EBV DNA by Raman spectroscopy. The results demonstrated that Si NWs/MPs with 20 min of etch time had the best capturing performance. Additionally, SEM observations revealed good contact of CTCs with Si NWs/MPs substrates. Moreover, the AgNPs-coated NWs/MPs substrate was shown to be a sensitive EBV DNA detector, by which the DNA detection limit can reach up to 10-13M. In conclusion, the Si NWs/MPs platform not only exhibits superior cell capturing ability, but also can sensitively detect EBV DNA at very low concentrations. This platform has great potential to become a promising diagnostic tool for monitoring disease status and prognostication of NPC patients.
Collapse
Affiliation(s)
- Sheng-Wei Lee
- Institute of Materials Science and Engineering, National Central University, Taoyuan City 32001, Taiwan; Department of Materials Science and Engineering, University of California, Irvine, Orange, CA 92697, USA.
| | - Yi-Wei Chen
- Institute of Materials Science and Engineering, National Central University, Taoyuan City 32001, Taiwan
| | - Edward C Kuan
- Department of Otolaryngology-Head and Neck Surgery, University of California, Irvine, Orange, CA 92868, USA.
| | - Ming-Ying Lan
- Division of Rhinology, Department of Otolaryngology Head and Neck Surgery, Taipei Veterans General Hospital, Taipei, 11217, Taiwan; School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan.
| |
Collapse
|