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Tian X, Zheng X, Chen L, Wang Z, Liu BT, Bi Y, Li L, Shi H, Li S, Li C, Zhang D. Recent advances in photoluminescent fluorescent probe technology for food flavor compounds analysis. Food Chem 2024; 459:140455. [PMID: 39029422 DOI: 10.1016/j.foodchem.2024.140455] [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: 04/16/2024] [Revised: 06/24/2024] [Accepted: 07/12/2024] [Indexed: 07/21/2024]
Abstract
The real-time, precise qualitative and quantitative sensing of food flavor compounds is crucial for ensuring food safety, quality, and consumer acceptance. As indicators for food flavor labeling, it is vital to delve deep into the specific ingredient and content of food flavor compounds to assess the food flavor quality, but still facing huge challenges. Photoluminescent fluorescent probe technology, with fast detection and high sensitivity, has shown immense potentials in detecting food flavor compounds. In this review, the classification and optical sensing mechanism of photoluminescent fluorescent probe technology are described in detail. Besides, challenges in applying photoluminescent fluorescent probe technology to analyze food flavor compounds are outlined to indicate future research directions. We hope this review can provide an insight for the applications of photoluminescent fluorescent probe technology in the evaluation of food flavor quality in future.
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Affiliation(s)
- Xiaoxian Tian
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xiaochun Zheng
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Li Chen
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Zhenyu Wang
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Bai-Tong Liu
- Department of Chemistry, The University of Hong Kong, 999077, Hong Kong Special Administrative Region
| | - Yongzhao Bi
- Food Laboratory of Zhongyuan, Beijing Technology and Business University, Beijing 100048, China
| | - Liang Li
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Haonan Shi
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shaobo Li
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Cheng Li
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Dequan Zhang
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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2
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Cheng Z, Wen ZF, Liu ZF, Zhang Y, Zhou Y, Feng XS. Capsaicinoids in Food: An Update on Pretreatment and Analysis Methods since 2010. Crit Rev Anal Chem 2024; 54:73-92. [PMID: 35320052 DOI: 10.1080/10408347.2022.2054269] [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] [Indexed: 10/18/2022]
Abstract
Capsaicinoids, whose basic chemical structure is the vanilla amide of n-nonanoic acid, are responsible for chili pepper fruits' spicy flavor (pungency) and multiple pharmacological actions. Capsaicinoids are widely used to produce intense flavor food additives due to their sensory attributes of pungency, aroma, and color. To ensure strict quality control for capsaicinoids and maximize their positive effects, valid and sensitive pretreatment and determination methods are urgently needed. Consequently, this review provides a comprehensive summary of capsaicinoids' preparation and analytical technologies in food samples. Pretreatment techniques mainly include liquid-liquid extraction, solid-phase extraction, solid-phase microextraction, and dispersive solid-phase microextraction, among others. Detection methods include liquid chromatography coupled with different detectors, gas chromatography, electrochemical sensor methods, capillary electrophoresis, etc. Furthermore, the advantages and disadvantages of various pretreatment and analytical methods are compared and discussed. Thus, the present paper has attempted to shed light on novel and traditionalpretreatment methods and determination approaches and provided proper comments about their new developments and applications.
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Affiliation(s)
- Zheng Cheng
- School of Pharmacy, China Medical University, Shenyang, China
| | - Zhi-Feng Wen
- Department of Neurosurgery, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Zhi-Fei Liu
- School of Pharmacy, China Medical University, Shenyang, China
| | - Yuan Zhang
- School of Pharmacy, China Medical University, Shenyang, China
| | - Yu Zhou
- Department of Pharmacy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xue-Song Feng
- School of Pharmacy, China Medical University, Shenyang, China
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Islam K, Rawoof A, Kumar A, Momo J, Ahmed I, Dubey M, Ramchiary N. Genetic Regulation, Environmental Cues, and Extraction Methods for Higher Yield of Secondary Metabolites in Capsicum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37289974 DOI: 10.1021/acs.jafc.3c01901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Capsicum (chili pepper) is a widely popular and highly consumed fruit crop with beneficial secondary metabolites such as capsaicinoids, carotenoids, flavonoids, and polyphenols, among others. Interestingly, the secondary metabolite profile is a dynamic function of biosynthetic enzymes, regulatory transcription factors, developmental stage, abiotic and biotic environment, and extraction methods. We propose active manipulable genetic, environmental, and extraction controls for the modulation of quality and quantity of desired secondary metabolites in Capsicum species. Specific biosynthetic genes such as Pun (AT3) and AMT in the capsaicinoids pathway and PSY, LCY, and CCS in the carotenoid pathway can be genetically engineered for enhanced production of capsaicinoids and carotenoids, respectively. Generally, secondary metabolites increase with the ripening of the fruit; however, transcriptional regulators such as MYB, bHLH, and ERF control the extent of accumulation in specific tissues. The precise tuning of biotic and abiotic factors such as light, temperature, and chemical elicitors can maximize the accumulation and retention of secondary metabolites in pre- and postharvest settings. Finally, optimized extraction methods such as ultrasonication and supercritical fluid method can lead to a higher yield of secondary metabolites. Together, the integrated understanding of the genetic regulation of biosynthesis, elicitation treatments, and optimization of extraction methods can maximize the industrial production of secondary metabolites in Capsicum.
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Affiliation(s)
- Khushbu Islam
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Abdul Rawoof
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Ajay Kumar
- Department of Plant Sciences, School of Biological Sciences, Central University of Kerala, Kasaragod 671316, Kerala, India
| | - John Momo
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Ilyas Ahmed
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Meenakshi Dubey
- Department of Biotechnology, Delhi Technological University, New Delhi 110042, India
| | - Nirala Ramchiary
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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4
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Lee S, Kang SH. Wavelength-Dependent Metal-Enhanced Fluorescence Biosensors via Resonance Energy Transfer Modulation. BIOSENSORS 2023; 13:376. [PMID: 36979588 PMCID: PMC10046318 DOI: 10.3390/bios13030376] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/10/2023] [Accepted: 03/10/2023] [Indexed: 06/18/2023]
Abstract
Fluorescence can be enhanced or quenched depending on the distance between the surface of a metal nanoparticle and the fluorophore molecule. Fluorescence enhancement by nearby metal particles is called metal-enhanced fluorescence (MEF). MEF shows promising potential in the field of fluorescence-based biological sensing. MEF-based biosensor systems generally fall into two platform categories: (1) a two/three-dimensional scaffold, or (2) a colloidal suspension. This review briefly summarizes the application studies using wavelength-dependent carbon dots (UV-VIS), noble metals (VIS), and upconversion nanoparticles (NIR to VIS), representative nanomaterials that contribute to the enhancement of fluorescence through the resonance energy transfer modulation and then presents a perspective on this topic.
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5
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Servarayan KL, Sundaram E, Lachathipathi P, Aravind MK, Ashokkumar B, Sivasamy VV. Fluorimetric chemodosimeter for the detection of capsaicinoids in food matrices. Food Chem 2023; 418:135843. [PMID: 36958185 DOI: 10.1016/j.foodchem.2023.135843] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/23/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023]
Abstract
Capsaicin is a major pungent capsaicinoids in chili pepper and it causes duodenal, liver, stomach and gastric cancer in human. Hence, the detection of capsaicinoids becomes important on health issues concern. Here we are reporting, the first organic molecule based fluorimetric sensor for capsaicin detection using simple fluorophore 4-3-(pyren-2-yl-acryloyl) phenyboronic acid (PAPA), which was synthesized via greener microwave method. The probe has detected the capsaicin selectively in presence of other biomolecules in human biofluids through the intramolecular charge transfer mechanism and supported with DFT studies. The sensor has shown an excellent response towards capsaicin from 2 to 40 µM and the limit of detection of 12.84 nM. Real time analysis was done in various food matrices having capsaicinoids and the results have clearly shown good agreement with our optimized data and it also evinced that the developed sensor can be applied to detect the level of pungency of capsaicinoids.
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Affiliation(s)
- Karthika Lakshmi Servarayan
- Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamilnadu, India
| | - Ellairaja Sundaram
- Department of Chemistry, Vivekananda College, Tiruvedakam West, Madurai 625 234, Tamilnadu, India
| | - Prakash Lachathipathi
- Department of Chemistry, Vivekananda College, Tiruvedakam West, Madurai 625 234, Tamilnadu, India
| | - Manikka Kubendran Aravind
- Department of Genetic Engineering, School of Biotechnology, Madurai Kamaraj University, Madurai 625 021, Tamilnadu, India
| | - Balasubramaniem Ashokkumar
- Department of Genetic Engineering, School of Biotechnology, Madurai Kamaraj University, Madurai 625 021, Tamilnadu, India
| | - Vasantha Vairathevar Sivasamy
- Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamilnadu, India.
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Lee S, Lee J, Batjikh I, Yu H, Kang SH. Ultrasensitive Hypoxia Sensing at the Single-Molecule Level via Super-Resolution Quantum Dot-Linked Immunosandwich Assay. ACS Sens 2022; 7:1372-1380. [PMID: 35437012 DOI: 10.1021/acssensors.1c02572] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Activated hypoxia-inducible factor-1alpha (HIF-1α) plays an important role in the adaptive response of tumor cells to oxygen changes through the transcriptional activation of genes that regulate important biological processes required for tumor survival and progression. In this study, we developed an ultrasensitive hypoxia sensor based on read-out with quantum dots on a gold nanodisc (quantum dot-linked immunosandwich assay, QLISA) with excellent selectivity for HIF-1α. The immunoassay platform was established by comparing the immune response results using Qdot525 as a detection nanoprobe instead of a fluorescent dye (Alexa488) (fluorescent-linked immunosandwich assay, FLISA). In addition, using three-dimensional total internal reflection fluorescence microscopy, the platform was optically sectioned along the z-axis at 10 nm intervals to compare the height difference between the nanodisc and the nanoprobe following the QLISA and FLISA procedures and to localize the target location. Here, the super-resolution QLISA (srQLISA)-based hypoxia sensor exhibited high accuracy and precision for the detection of HIF-1α-extracted samples in cancer spheroids compared with the super-resolution FLISA (srFLISA) method. The developed nanobiosensor method demonstrated a wide dynamic linear detection range of 32.2 zM-8.0 pM with a limit of detection of 16 zM under optimal experimental conditions for HIF-1α, an approximate 106-fold enhanced detection sensitivity compared with the conventional enzyme-linked immunosorbent assay method based on absorbance. The detection of HIF-1α using the newly developed srQLISA sensor allows for independently predicting tumor progression and early cancer onset increases in the microvasculature density of tumor lesions.
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Affiliation(s)
- Seungah Lee
- Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Junghwa Lee
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Indra Batjikh
- Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Hyunung Yu
- Advanced Instrumentation Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea
| | - Seong Ho Kang
- Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
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Gao J, Wang C, Wang C, Chu Y, Wang S, Sun MY, Ji H, Gao Y, Wang Y, Han Y, Song F, Liu H, Zhang Y, Han L. Poly-l-Lysine-Modified Graphene Field-Effect Transistor Biosensors for Ultrasensitive Breast Cancer miRNAs and SARS-CoV-2 RNA Detection. Anal Chem 2022; 94:1626-1636. [PMID: 35025203 PMCID: PMC8767657 DOI: 10.1021/acs.analchem.1c03786] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 01/04/2022] [Indexed: 11/29/2022]
Abstract
(Mi)RNAs are important biomarkers for cancers diagnosis and pandemic diseases, which require fast, ultrasensitive, and economical detection strategies to quantitatively detect exact (mi)RNAs expression levels. The novel coronavirus disease (SARS-CoV-2) has been breaking out globally, and RNA detection is the most effective way to identify the SARS-CoV-2 virus. Here, we developed an ultrasensitive poly-l-lysine (PLL)-functionalized graphene field-effect transistor (PGFET) biosensor for breast cancer miRNAs and viral RNA detection. PLL is functionalized on the channel surface of GFET to immobilize DNA probes by the electrostatic force. The results show that PGFET biosensors can achieve a (mi)RNA detection range of five orders with a detection limit of 1 fM and an entire detection time within 20 min using 2 μL of human serum and throat swab samples, which exhibits more than 113% enhancement in terms of sensitivity compared to that of GFET biosensors. The performance enhancement mechanisms of PGFET biosensors were comprehensively studied based on an electrical biosensor theoretical model and experimental results. In addition, the PGFET biosensor was applied for the breast cancer miRNA detection in actual serum samples and SARS-CoV-2 RNA detection in throat swab samples, providing a promising approach for rapid cancer diagnosis and virus screening.
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Affiliation(s)
- Jianwei Gao
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Chunhua Wang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Chao Wang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Yujin Chu
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Shun Wang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Ming yuan Sun
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Hao Ji
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Yakun Gao
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Yanhao Wang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Yingkuan Han
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Fangteng Song
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Hong Liu
- State
Key Laboratory of Crystal Materials, Shandong
University, Jinan, Shandong 250100, China
| | - Yu Zhang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Lin Han
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
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8
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Chakkarapani SK, Lee S, Kang SH. Ultrasensitive Capsaicin Sensor Based on Endogenous Single‐Molecule Fluorophore Enhancement and Quenching Interface on Gold Nanoislands. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12369] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Suresh Kumar Chakkarapani
- Department of Applied Chemistry and Institute of Natural Sciences Kyung Hee University Yongin‐si 17104 South Korea
| | - Seungah Lee
- Department of Applied Chemistry and Institute of Natural Sciences Kyung Hee University Yongin‐si 17104 South Korea
| | - Seong Ho Kang
- Department of Applied Chemistry and Institute of Natural Sciences Kyung Hee University Yongin‐si 17104 South Korea
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9
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Sun Y, Lee S, Kang SH. Cubic spline-based depth-dependent localization of mitochondria-endoplasmic reticulum contacts by three-dimensional light-sheet super-resolution microscopy. Analyst 2021; 146:4781-4788. [PMID: 34231561 DOI: 10.1039/d1an00852h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The contact distance between mitochondria (Mito) and endoplasmic reticulum (ER) has received considerable attention owing to their crucial function in maintaining lipid and calcium homeostasis. Herein, cubic spline algorithm-based depth-dependent fluorescence-free three-dimensional light-sheet super-resolution microscopy (3D LSRM) with dual-wavelength illumination sources was investigated to study the distance of Mito-ER contacts in various live cells. To detect wavelength-dependent scattering, 12 nm gold nanoparticles (AuNPs) and 20 nm silver nanoparticles (AgNPs) as fluorescence-free nanoprobes were conjugated with Mito and ER. The cubic spline algorithm-based method showed improved localization precision in lateral and axial directions compared with that for previously used least squares and least cubic algorithms. The cubic spline-based depth-dependent localization was applied to the spatial localization of nanoprobes in super-resolution images, in which the average distance of Mito and ER was 22.4 nm in HeLa cells, 22.2 nm in RAW264.7 macrophage cells, 21.9 nm in AGS cells, 21.4 nm in HT29 cells, and 21.3 nm in HEK293 cells. The distances were ∼12% larger than those previously determined by electron microscopy, which demonstrated that this method was accessible and reliable for studying the intracellular structures of various live cells at the subdiffraction limit resolution.
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Affiliation(s)
- Yucheng Sun
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Seungah Lee
- Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
| | - Seong Ho Kang
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea and Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
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Abstract
As one kind of noble metal nanostructures, the plasmonic gold nanostructures possess unique optical properties as well as good biocompatibility, satisfactory stability, and multiplex functionality. These distinctive advantages make the plasmonic gold nanostructures an ideal medium in developing methods for biosensing and bioimaging. In this review, the optical properties of the plasmonic gold nanostructures were firstly introduced, and then biosensing in vitro based on localized surface plasmon resonance, Rayleigh scattering, surface-enhanced fluorescence, and Raman scattering were summarized. Subsequently, application of the plasmonic gold nanostructures for in vivo bioimaging based on scattering, photothermal, and photoacoustic techniques has been also briefly covered. At last, conclusions of the selected examples are presented and an outlook of this research topic is given.
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Tian M, Yuan Z, Liu Y, Lu C, Ye Z, Xiao L. Recent advances of plasmonic nanoparticle-based optical analysis in homogeneous solution and at the single-nanoparticle level. Analyst 2020; 145:4737-4752. [PMID: 32500906 DOI: 10.1039/d0an00609b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Plasmonic nanoparticles with special localized surface plasmon resonance (LSPR) characters have been widely applied for optical sensing of various targets. With the combination of single nanoparticle imaging techniques, dynamic information of reactions and biological processes is obtained, facilitating the deep understanding of their principle and design of outstanding nanomaterials. In this review, we summarize the recently adopted optical analysis of diverse analytes based on plasmonic nanoparticles both in homogeneous solution and at the single-nanoparticle level. A brief introduction of LSPR is first discussed. Colorimetric and fluorimetric homogeneous detection examples by using different sensing mechanisms and strategies are provided. Single plasmonic nanoparticle-based analysis is concluded in two aspects: visualization of chemical reactions and understanding of biological processes. The basic sensing mechanisms and performances of these systems are introduced. Finally, this review highlights the challenges and future trend of plasmonic nanoparticle-based optical analysis systems.
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Affiliation(s)
- Mingce Tian
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Zhiqin Yuan
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Ying Liu
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Zhongju Ye
- College of Chemistry, Nankai University, Tianjin, 300071, China.
| | - Lehui Xiao
- College of Chemistry, Nankai University, Tianjin, 300071, China.
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Peng M, Sun F, Na N, Ouyang J. Target-Triggered Assembly of Nanogap Antennas to Enhance the Fluorescence of Single Molecules and Their Application in MicroRNA Detection. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000460. [PMID: 32309897 DOI: 10.1002/smll.202000460] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 06/11/2023]
Abstract
Nanogap antennas are plasmonic nanostructures with a strong electromagnetic field generated at the gap region of two neighboring particles owing to the coupling of the collective surface plasmon resonance. They have great potential for improving the optical properties of fluorophores. Herein, nanogap antennas are constructed using an aqueous solution-based method to overcome the defects of weak fluorescence and photobleaching associated with traditional organic dyes, and a highly sensitive nanogap antenna-based sensing strategy is presented for the detection of low-abundance nucleic acid biomarkers via a target-triggered strand displacement amplification (SDA) reaction between two DNA hairpins that are tagged to the tips of gold nanorods (Au NRs). In the presence of targets, end-to-end Au NR dimers gradually form, and the fluorophores quenched by the Au NRs exhibit a dramatic fluorescence enhancement due to the plasmon-enhanced fluorescence effect of nanogap antennas. Meanwhile, the SDA reaction results in secondary amplification of fluorescence signals. Combined with single-molecule counting, this method applied in miRNA-21 detection can achieve a low detection limit of 97.2 × 10-18 m. Moreover, accurate discrimination between different cells through miRNA-21 imaging demonstrates the potential of this method in monitoring the expression level of low-abundance nucleic acid biomarkers.
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Affiliation(s)
- Manshu Peng
- State Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Feifei Sun
- State Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Na Na
- State Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Jin Ouyang
- State Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, China
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Sun Y, Park B, Ha JH, Kang SH. Voltage program-based MEKC with LIF detection for rapid quantification of native capsaicin and dihydrocapsaicin in foods. Food Chem 2020; 323:126831. [PMID: 32334311 DOI: 10.1016/j.foodchem.2020.126831] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 04/14/2020] [Accepted: 04/14/2020] [Indexed: 01/23/2023]
Abstract
Voltage program (VP)-based micellar electrokinetic chromatography (MEKC) with a laser-induced fluorescence (LIF) detector was developed for fast, high-sensitivity detection of native capsaicin (CAP) and dihydrocapsaicin (DHC) in various foods. The combination of mixed nonionic (Tween 20) and anionic (SDS) surfactants in a sodium borate running buffer showed excellent separation efficiency, selectivity, and speed without loss of resolving power (Rs > 2). Compared to conventional UV absorption, LIF showed enhanced detection sensitivity with detection limits at the pM level. In addition, the developed VP-based MEKC-LIF method was successfully applied for quantification of capsaicin in chili pepper, baechu, and kimchi at a 98% confidence level. CAP and DHC were also analyzed within a short time in extracts from real samples of gochujang, snacks (Swingchip®), black pepper, and ginger but were not detected in garlic.
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Affiliation(s)
- Yucheng Sun
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Boyeon Park
- Hygienic Safety and Analysis Center, World Institute of Kimchi, Gwangju 61755, Republic of Korea
| | - Ji-Hyoung Ha
- Hygienic Safety and Analysis Center, World Institute of Kimchi, Gwangju 61755, Republic of Korea
| | - Seong Ho Kang
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea; Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
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