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Sobhanan J, Ono K, Okamoto T, Sawada M, Weiss PS, Biju V. Photosensitizer-singlet oxygen sensor conjugated silica nanoparticles for photodynamic therapy and bioimaging. Chem Sci 2024; 15:2007-2018. [PMID: 38332815 PMCID: PMC10848760 DOI: 10.1039/d3sc03877g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 12/10/2023] [Indexed: 02/10/2024] Open
Abstract
Intracellular singlet oxygen (1O2) generation and detection help optimize the outcome of photodynamic therapy (PDT). Theranostics programmed for on-demand phototriggered 1O2 release and bioimaging have great potential to transform PDT. We demonstrate an ultrasensitive fluorescence turn-on sensor-sensitizer-RGD peptide-silica nanoarchitecture and its 1O2 generation-releasing-storing-sensing properties at the single-particle level or in living cells. The sensor and sensitizer in the nanoarchitecture are an aminomethyl anthracene (AMA)-coumarin dyad and a porphyrin or CdSe/ZnS quantum dots (QDs), respectively. The AMA in the dyad quantitatively quenches the fluorescence of coumarin by intramolecular electron transfer, the porphyrin or QD moiety generates 1O2, and the RGD peptide facilitates intracellular delivery. The small size, below 200 nm, as verified by scanning electron microscopy and differential light scattering measurements, of the architecture within the 1O2 diffusion length enables fast and efficient intracellular fluorescence switching by the tandem ultraviolet (UV)-visible or visible-near-infrared (NIR) photo-triggering. While the red emission and 1O2 generation by the porphyrin are continually turned on, the blue emission of coumarin is uncaged into 230-fold intensity enhancement by on-demand photo-triggering. The 1O2 production and release by the nanoarchitecture enable spectro-temporally controlled cell imaging and apoptotic cell death; the latter is verified from cytotoxic data under dark and phototriggering conditions. Furthermore, the bioimaging potential of the TCPP-based nanoarchitecture is examined in vivo in B6 mice.
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Affiliation(s)
- Jeladhara Sobhanan
- Graduate School of Environmental Science, Hokkaido University Sapporo Hokkaido 060-0810 Japan
- Department of Chemistry, Rice University Houston Texas 77005 USA
| | - Kenji Ono
- Research Institute of Environmental Medicine, Nagoya University Nagoya 464-8601 Japan
| | - Takuya Okamoto
- Graduate School of Environmental Science, Hokkaido University Sapporo Hokkaido 060-0810 Japan
- Research Institute for Electronic Science, Hokkaido University Sapporo Hokkaido 001-0020 Japan
| | - Makoto Sawada
- Research Institute of Environmental Medicine, Nagoya University Nagoya 464-8601 Japan
| | - Paul S Weiss
- California NanoSystems Institute and the Departments of Chemistry and Biochemistry, Bioengineering, and Materials Science and Engineering, University of California Los Angeles CA 90095-1487 USA
| | - Vasudevanpillai Biju
- Graduate School of Environmental Science, Hokkaido University Sapporo Hokkaido 060-0810 Japan
- Research Institute for Electronic Science, Hokkaido University Sapporo Hokkaido 001-0020 Japan
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2
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Wang P, Wang XY, Man CF, Gong DD, Fan Y. Advances in hyperbaric oxygen to promote immunotherapy through modulation of the tumor microenvironment. Front Oncol 2023; 13:1200619. [PMID: 37790761 PMCID: PMC10543083 DOI: 10.3389/fonc.2023.1200619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 08/25/2023] [Indexed: 10/05/2023] Open
Abstract
Hyperbaric oxygen therapy is a relatively safe treatment method that has been used for a long time in the clinic. It has been proven that it can enhance the sensitivity of radiotherapy and photodynamic therapy for cancer. However, there are few studies on hyperbaric oxygen and immunotherapy. In this article, we summarize that hyperbaric oxygen therapy regulates the tumor microenvironment through various pathways such as improving tumor hypoxia, targeting hypoxia-inducing factors, and generating reactive oxygen species. The change in the tumor microenvironment ultimately affects the curative effect of immunotherapy. Therefore, hyperbaric oxygen can influence immunotherapy by regulating the tumor microenvironment, providing a direction for the future development of immunotherapy.
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Affiliation(s)
- Pei Wang
- Cancer Institute, The Affiliated People’s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Xiao-Yan Wang
- Department of Gastroenterology, The Affiliated Suqian First People’s Hospital of Xuzhou Medical University, Suqian, Jiangsu, China
| | - Chang-Feng Man
- Cancer Institute, The Affiliated People’s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Dan-Dan Gong
- Cancer Institute, The Affiliated People’s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Yu Fan
- Cancer Institute, The Affiliated People’s Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
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3
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Popov LD. Mitochondria as intracellular signalling organelles. An update. Cell Signal 2023:110794. [PMID: 37422005 DOI: 10.1016/j.cellsig.2023.110794] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/23/2023] [Accepted: 07/02/2023] [Indexed: 07/10/2023]
Abstract
Traditionally, mitochondria are known as "the powerhouse of the cell," responsible for energy (ATP) generation (by the electron transport chain, oxidative phosphorylation, the tricarboxylic acid cycle, and fatty acid ß-oxidation), and for the regulation of several metabolic processes, including redox homeostasis, calcium signalling, and cellular apoptosis. The extensive studies conducted in the last decades portray mitochondria as multifaceted signalling organelles that ultimately command cells' survival or death. Based on current knowledge, we'll outline the mitochondrial signalling to other intracellular compartments in homeostasis and pathology-related mitochondrial stress conditions here. The following topics are discussed: (i) oxidative stress and mtROS signalling in mitohormesis, (ii) mitochondrial Ca2+ signalling; (iii) the anterograde (nucleus-to-mitochondria) and retrograde (mitochondria-to-nucleus) signal transduction, (iv) the mtDNA role in immunity and inflammation, (v) the induction of mitophagy- and apoptosis - signalling cascades, (vi) the mitochondrial dysfunctions (mitochondriopathies) in cardiovascular, neurodegenerative, and malignant diseases. The novel insights into molecular mechanisms of mitochondria-mediated signalling can explain mitochondria adaptation to metabolic and environmental stresses to achieve cell survival.
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Affiliation(s)
- Lucia-Doina Popov
- Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8, B.P. Hasdeu Street, 050568 Bucharest, Romania.
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4
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Raj S, Unsworth LD. Targeting active sites of inflammation using inherent properties of tissue-resident mast cells. Acta Biomater 2023; 159:21-37. [PMID: 36657696 DOI: 10.1016/j.actbio.2023.01.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/12/2022] [Accepted: 01/10/2023] [Indexed: 01/18/2023]
Abstract
Mast cells play a pivotal role in initiating and directing host's immune response. They reside in tissues that primarily interface with the external environment. Activated mast cells respond to environmental cues throughout acute and chronic inflammation through releasing immune mediators via rapid degranulation, or long-term de novo expression. Mast cell activation results in the rapid release of a variety of unique enzymes and reactive oxygen species. Furthermore, the increased density of mast cell unique receptors like mas related G protein-coupled receptor X2 also characterizes the inflamed tissues. The presence of these molecules (either released mediators or surface receptors) are particular to the sites of active inflammation, and are a result of mast cell activation. Herein, the molecular design principles for capitalizing on these novel mast cell properties is discussed with the goal of manipulating localized inflammation. STATEMENT OF SIGNIFICANCE: Mast cells are immune regulating cells that play a crucial role in both innate and adaptive immune responses. The activation of mast cells causes the release of multiple unique profiles of biomolecules, which are specific to both tissue and disease. These unique characteristics are tightly regulated and afford a localized stimulus for targeting inflammatory diseases. Herein, these important mast cell attributes are discussed in the frame of highlighting strategies for the design of bioresponsive functional materials to target regions of inflammations.
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Affiliation(s)
- Shammy Raj
- Department of Chemical and Materials Engineering, Donadeo Innovation Centre for Engineering, 9211-116 Street NW, University of Alberta, Edmonton, AB, T6G1H9, Canada
| | - Larry D Unsworth
- Department of Chemical and Materials Engineering, Donadeo Innovation Centre for Engineering, 9211-116 Street NW, University of Alberta, Edmonton, AB, T6G1H9, Canada.
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5
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Wu S, Jiang L, Lei L, Fu C, Huang J, Hu Y, Dong Y, Chen J, Zeng Q. Crosstalk between G-quadruplex and ROS. Cell Death Dis 2023; 14:37. [PMID: 36653351 PMCID: PMC9849334 DOI: 10.1038/s41419-023-05562-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 12/25/2022] [Accepted: 01/05/2023] [Indexed: 01/19/2023]
Abstract
The excessive production of reactive oxygen species (ROS) can lead to single nucleic acid base damage, DNA strand breakage, inter- and intra-strand cross-linking of nucleic acids, and protein-DNA cross-linking involved in the pathogenesis of cancer, neurodegenerative diseases, and aging. G-quadruplex (G4) is a stacked nucleic acid structure that is ubiquitous across regulatory regions of multiple genes. Abnormal formation and destruction of G4s due to multiple factors, including cations, helicases, transcription factors (TFs), G4-binding proteins, and epigenetic modifications, affect gene replication, transcription, translation, and epigenetic regulation. Due to the lower redox potential of G-rich sequences and unique structural characteristics, G4s are highly susceptible to oxidative damage. Additionally, the formation, stability, and biological regulatory role of G4s are affected by ROS. G4s are involved in regulating gene transcription, translation, and telomere length maintenance, and are therefore key players in age-related degeneration. Furthermore, G4s also mediate the antioxidant process by forming stress granules and activating Nrf2, which is suggestive of their involvement in developing ROS-related diseases. In this review, we have summarized the crosstalk between ROS and G4s, and the possible regulatory mechanisms through which G4s play roles in aging and age-related diseases.
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Affiliation(s)
- Songjiang Wu
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China
| | - Ling Jiang
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China
| | - Li Lei
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China
| | - Chuhan Fu
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China
| | - Jinhua Huang
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China
| | - Yibo Hu
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China
| | - Yumeng Dong
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China
| | - Jing Chen
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China.
| | - Qinghai Zeng
- Department of Dermatology, Third Xiangya Hospital, Central South University, 138 Tongzipo Road, 410013, Changsha, Hunan, PR China.
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6
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Zhang J, Lin Y, Lin Z, Wei Q, Qian J, Ruan R, Jiang X, Hou L, Song J, Ding J, Yang H. Stimuli-Responsive Nanoparticles for Controlled Drug Delivery in Synergistic Cancer Immunotherapy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103444. [PMID: 34927373 PMCID: PMC8844476 DOI: 10.1002/advs.202103444] [Citation(s) in RCA: 79] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/28/2021] [Indexed: 05/10/2023]
Abstract
Cancer immunotherapy has achieved promising clinical progress over the recent years for its potential to treat metastatic tumors and inhibit their recurrences effectively. However, low patient response rates and dose-limiting toxicity remain as major dilemmas for immunotherapy. Stimuli-responsive nanoparticles (srNPs) combined with immunotherapy offer the possibility to amplify anti-tumor immune responses, where the weak acidity, high concentration of glutathione, overexpressions of enzymes, and reactive oxygen species, and external stimuli in tumors act as triggers for controlled drug release. This review highlights the design of srNPs based on tumor microenvironment and/or external stimuli to combine with different anti-tumor drugs, especially the immunoregulatory agents, which eventually realize synergistic immunotherapy of malignant primary or metastatic tumors and acquire a long-term immune memory to prevent tumor recurrence. The authors hope that this review can provide theoretical guidance for the construction and clinical transformation of smart srNPs for controlled drug delivery in synergistic cancer immunotherapy.
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Affiliation(s)
- Jin Zhang
- Qingyuan Innovation LaboratoryCollege of Chemical EngineeringFuzhou University2 Xueyuan RoadFuzhou350108P. R. China
| | - Yandai Lin
- Qingyuan Innovation LaboratoryCollege of Chemical EngineeringFuzhou University2 Xueyuan RoadFuzhou350108P. R. China
| | - Zhe Lin
- Ruisi (Fujian) Biomedical Engineering Research Center Co LtdFuzhou350100P. R. China
| | - Qi Wei
- Key Laboratory of Polymer EcomaterialsChangchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022P. R. China
- State Key Laboratory of Molecular Engineering of PolymersFudan University220 Handan RoadShanghai200433P. R. China
| | - Jiaqi Qian
- Qingyuan Innovation LaboratoryCollege of Chemical EngineeringFuzhou University2 Xueyuan RoadFuzhou350108P. R. China
| | - Renjie Ruan
- Qingyuan Innovation LaboratoryCollege of Chemical EngineeringFuzhou University2 Xueyuan RoadFuzhou350108P. R. China
| | - Xiancai Jiang
- Qingyuan Innovation LaboratoryCollege of Chemical EngineeringFuzhou University2 Xueyuan RoadFuzhou350108P. R. China
| | - Linxi Hou
- Qingyuan Innovation LaboratoryCollege of Chemical EngineeringFuzhou University2 Xueyuan RoadFuzhou350108P. R. China
| | - Jibin Song
- MOE Key Laboratory for Analytical Science of Food Safety and BiologyState Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou University2 Xueyuan RoadFuzhou350108P. R. China
| | - Jianxun Ding
- Key Laboratory of Polymer EcomaterialsChangchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022P. R. China
- State Key Laboratory of Molecular Engineering of PolymersFudan University220 Handan RoadShanghai200433P. R. China
| | - Huanghao Yang
- MOE Key Laboratory for Analytical Science of Food Safety and BiologyState Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou University2 Xueyuan RoadFuzhou350108P. R. China
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7
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Shariatinia Z. Big family of nano- and microscale drug delivery systems ranging from inorganic materials to polymeric and stimuli-responsive carriers as well as drug-conjugates. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102790] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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8
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Ren HX, Qian ZJ, Li M, Peng CF, Wang ZP, Wei XL, Xu JG. Mesoporous silica-loaded gold nanocluster with enhanced fluorescence and ratiometric fluorescent detection of thiram in foods. Mikrochim Acta 2021; 188:363. [PMID: 34606019 DOI: 10.1007/s00604-021-05028-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/13/2021] [Indexed: 01/31/2023]
Abstract
A core-shell QDs@mSiO2@y-AuNCs nanoprobe was prepared, and a new ratiometric fluorescent sensor for thiram detection was developed. The mechanism of thiram sensing was investigated using FTIR, surface-enhanced Raman, XPS spectra, etc. The sensing of thiram was mainly ascribed to the formation of Au-S bonds between thiram and Au atoms on y-AuNCs surface, resulting in the dissociation of 11-MUA ligand from the y-AuNCs surface and the charge transfer between thiram and y-AuNCs. In the ratiometric fluorescence detection of thiram based on QDs@mSiO2@y-AuNCs, a linear range of 0.5-60 ng/mL was obtained with a LOD of 0.19 ng/mL. Compared with the fluorescence detection based on y-AuNCs, the ratiometric fluorescence detection of thiram demonstrated 3-fold enhanced sensitivity. The improvement was ascribed to two aspects: the fluorescence emission of y-AuNCs was enhanced after they were loaded onto the QDs@mSiO2 nanoparticles; the ratiometric detection mode provided more precise sensing. The detection of thiram can be completed immediately after mixing the nanoprobe with thiram. Good recoveries of thiram in apple and pear samples were achieved. All the above results demonstrated the high potential of this method in practical applications.
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Affiliation(s)
- Hong-Xin Ren
- State Key Laboratory of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China
- School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China
| | - Zhi-Juan Qian
- Nanjing Customs District Light Industry Products and Children's Products Inspection Center, Yangzhou, 225009, P. R, China
| | - Min Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China
- School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China
| | - Chi-Fang Peng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China.
- School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China.
- International Joint Laboratory On Food Safety, Jiangnan University, Lihu Road, 1800, Wuxi, 214122, P. R, China.
| | - Zhou-Ping Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China
- School of Food Science and Technology, Jiangnan University, Lihu Road 1800, Wuxi, 214122, P. R, China
- International Joint Laboratory On Food Safety, Jiangnan University, Lihu Road, 1800, Wuxi, 214122, P. R, China
| | - Xin-Lin Wei
- School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai, 200240, P. R, China
| | - Jian-Guo Xu
- School of Food Science and Biological Engineering, Hefei University of Technology, Hefei, 230009, P. R, China.
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Lou XF, Du YZ, Xu XL. Endogenous Enzyme-responsive Nanoplatforms for Anti-tumor Therapy. Curr Drug Targets 2021; 22:845-855. [PMID: 33459230 DOI: 10.2174/1389450122666210114095614] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/28/2020] [Accepted: 11/11/2020] [Indexed: 11/22/2022]
Abstract
The emergency of responsive drug delivery systems has contributed to reduced cytotoxicity, improved permeability in tissues and extended circulation time of the active drug. In particular, enzyme-responsive nanoplatforms have attracted a lot of attention due to the specificity and efficiency of an enzyme-catalyzed reaction. In this review, enzyme-based mono responsive drug delivery systems designed in the past 5 years have been summarized. These drug delivery systems were introduced by different tumor-related enzymes such as matrix metalloproteinase, esterase, hyaluronidase, caspase and cathepsin. Moreover, the enzyme-sensitive nanoplatforms activated by dual-stimuli have been also described. Although great progress had been made in the past years, the translation into clinical practice is still difficult. Thus, three obstacles (enzyme heterogeneity, reaction environment, animal model) were also discussed. In short, enzyme-activated drug delivery systems offer great potential in treating cancers.
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Affiliation(s)
- Xue-Fang Lou
- School of Medicine, Zhejiang University City College, 51 Hu-Zhou Street, Hangzhou 310015, China
| | - Yong-Zhong Du
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiao-Ling Xu
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
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10
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Deng P, Xiao F, Wang Z, Jin G. A Novel BODIPY Quaternary Ammonium Salt-Based Fluorescent Probe: Synthesis, Physical Properties, and Live-Cell Imaging. Front Chem 2021; 9:650006. [PMID: 33777904 PMCID: PMC7994363 DOI: 10.3389/fchem.2021.650006] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 02/01/2021] [Indexed: 01/16/2023] Open
Abstract
The development of biological fluorescent probes is of great significance to the field of cancer bio-imaging. However, most current probes within the bulky hydrophobic group have limited application in aqueous medium and restricted imaging under physiological conditions. Herein, we proposed two efficient molecules to study their physical properties and imaging work, and the absorption and fluorescence intensity were collected with varying ions attending in aqueous medium. We enhance the water solubility through the quaternization reaction and form a balance between hydrophilic and hydrophobicity with dipyrrome-theneboron difluoride (BODIPY) fluorophore. We introduced pyridine and dimethylaminopyridine (DMAP) by quaternization and connected the BODIPY fluorophore by ethylenediamine. The final synthesized probes have achieved ideal affinity with HeLa cells (human cervical carcinoma cell line) in live-cell imaging which could be observed by Confocal Microscope. The probes also have a good affinity with subcutaneous tumor cells in mice in in vivo imaging, which may make them candidates as oncology imaging probes.
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Affiliation(s)
- Peng Deng
- The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, Zhenjiang, China
| | - Fuyan Xiao
- School of Pharmacy, Jiangsu University, Zhenjiang, China
| | - Zhou Wang
- College of Vanadium and Titanium, Panzhihua University, Panzhihua, China
| | - Guofan Jin
- School of Pharmacy, Jiangsu University, Zhenjiang, China
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Pu L, Xia M, Sun P, Zhang Y. Ratiometric fluorescence determination of alkaline phosphatase activity based on dual emission of bovine serum albumin-stabilized gold nanoclusters and the inner filter effect. Analyst 2021; 146:943-948. [PMID: 33242047 DOI: 10.1039/d0an01978j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A novel and convenient method for the ratiometric fluorescence detection of alkaline phosphatase (ALP) activity was proposed based on dual emission of bovine serum albumin-templated gold nanoclusters (BSA-AuNCs) and the mechanism of the inner filter effect between BSA-AuNCs and p-nitrophenol (PNP). First, ALP catalyzed the hydrolysis of the substrate p-nitrophenyl phosphate (PNPP) to produce PNP. PNP effectively quenched the emission peak of BSA-AuNCs at 410 nm because of the overlap in absorbance feature of PNP and the fluorescence spectrum of BSA-AuNCs, and the peak at 650 nm was almost unaffected. Thus, a sensitive ratiometric method for detection of ALP activity was developed using the fluorescence intensity of BSA-AuNCs at 650 nm as a reference signal. ALP activity versus the ratio of fluorescence intensities at 410 and 650 nm showed good linearity between 0.2 and 5 mU mL-1 (R2 = 0.9931) and high sensitivity with a detection limit of 0.03 mU mL-1 (S/N = 3). The developed sensing method was successfully applied to investigate ALP inhibitors and detect ALP in serum samples.
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Affiliation(s)
- Li Pu
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, China
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