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Saleem M, Hanif M, Rafiq M, Raza H, Ja KS, Lu C. γ-Glutamyltranspeptidase (GGT) Sensitive Fluorescence Probes for Cancer Diagnosis; Brief Review. J Fluoresc 2024; 34:977-1006. [PMID: 37505365 DOI: 10.1007/s10895-023-03353-6] [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: 06/24/2023] [Accepted: 07/18/2023] [Indexed: 07/29/2023]
Abstract
Millions of deaths occur each year due to the late diagnosis of abnormal cellular growth within the body. However, the devastating impact of this can be significantly reduced if cancer metastasis is detected early through the use of enzymatic biomarkers. Among several biomarkers, γ-glutamyltranspeptidase (GGT) stands out as a member of the aminopeptidase family. It is primarily found on the surface of cancer cells such as glioma, ovarian, lung, and prostate cancer, without being overexpressed in normal cells or tissues. Recent years have witnessed significant progress in the field of cancer monitoring and imaging. Fluorescence sensing techniques have been employed, utilizing organic small molecular probes with enzyme-specific recognition sites. These probes emit a fluorescent signal upon interacting with GGT, enabling the imaging, identification, and differentiation of normal and cancerous cells, tissues, and organs. This review article presents a concise overview of recent progress in fluorescent probes developed for the selective detection of GGT, focusing on their applications in cancer imaging. It highlights the observed alterations in the fluorescence and absorption spectra of the probes before and after interaction with GGT. Additionally, the study investigates the changes in the probe molecule's structure following enzyme treatment, evaluates the sensor's detection limit, and consolidated imaging studies conducted using confocal fluorescence analysis. This comprehensive survey is expected to contribute to the advancement of sensing techniques for biomarker detection and cancer imaging, providing valuable insights for refining methodologies and inspiring future developments in this field.
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Affiliation(s)
- Muhammad Saleem
- Department of Chemistry, University of Sargodha, Sargodha, Pakistan.
- Department of Chemistry, Thal University Bhakkar, Bhakkar, 30000, Pakistan.
| | - Muhammad Hanif
- Department of Chemistry, GC University Faisalabad, Sub Campus, Layyah, 31200, Pakistan
| | - Muhammad Rafiq
- Department of Physiology and Biochemistry, Cholistan University of Veterinary and Animal Sciences, Bahawalpur, 6300, Pakistan
| | - Hussain Raza
- Department of Biological Sciences, Kongu National University, Kongju Chungnam, Republic of Korea
| | - Kim Song Ja
- Department of Biological Sciences, Kongu National University, Kongju Chungnam, Republic of Korea
| | - Changrui Lu
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
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2
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Zhao Y, Shen A, Hao X, Li M, Hou L, Li Z, Duan R, Du M, Li X, Wang X, Zhao X, Yang Y. Ultrasensitivity Detecting AChE through "Covalent Assembly" and Signal Amplification Strategic Approaches and Applied to Screen Its Inhibitor. Anal Chem 2023; 95:4503-4512. [PMID: 36812425 DOI: 10.1021/acs.analchem.2c05313] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
An ultrasensitivity detecting assay for acetylcholinesterase (AChE) activity was developed based on "covalent assembly" and signal amplification strategic approaches. After hydrolyzing thioacetylcholine by AChE and participation of thiol in a self-inducing cascade accelerated by the Meldrum acid derivatives of 2-[bis(methylthio) methylene] malonitrile (CA-2), mercaptans triggered an intramolecular cyclization assembly by the probe of 2-(2,2-dicyanovinyl)-5-(diethylamino) phenyl 2,4-dinitrobenzenesulfonate (Sd-I) to produce strong fluorescence. The limit of detection for AChE activity was as low as 0.0048 mU/mL. The detection system also had a good detecting effect on AChE activity in human serum and could also be used to screen its inhibitors. By constructing a Sd-I@agarose hydrogel with a smartphone, a point-of-care detection of AChE activity was achieved again.
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Affiliation(s)
- Yongwei Zhao
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ao Shen
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaohui Hao
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Mengwen Li
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Lala Hou
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ziqi Li
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ruochen Duan
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Man Du
- School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xue Li
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xuebing Wang
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiuqing Zhao
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yunxu Yang
- Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
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Rouhi N, Akhgari A, Orouji N, Nezami A, Rahimzadegan M, Kamali H. Recent progress in the graphene-based biosensing approaches for the detection of Alzheimer's biomarkers. J Pharm Biomed Anal 2023; 222:115084. [DOI: 10.1016/j.jpba.2022.115084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 09/15/2022] [Accepted: 09/26/2022] [Indexed: 12/01/2022]
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Guo F, Li Q, Zhang X, Liu Y, Jiang J, Cheng S, Yu S, Zhang X, Liu F, Li Y, Rose G, Zhang H. Applications of Carbon Dots for the Treatment of Alzheimer's Disease. Int J Nanomedicine 2022; 17:6621-6638. [PMID: 36582459 PMCID: PMC9793737 DOI: 10.2147/ijn.s388030] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 11/29/2022] [Indexed: 12/25/2022] Open
Abstract
There are currently approximately 50 million victims of Alzheimer's disease (AD) worldwide. The exact cause of the disease is unknown at this time, but amyloid plaques and neurofibrillary tangles in the brain are hallmarks of the disease. Current drug treatments for AD may slow the progression of the disease and improve the quality of life of patients, but they are often only minimally effective and are not cures. A major obstacle to developing and delivering more effective drug therapies is the presence of the blood-brain barrier (BBB), which prevents many compounds with therapeutic potential from reaching the central nervous system. Nanotechnology may provide a solution to this problem. Among the medical nanomaterials currently being studied, carbon dots (CDs) have attracted widespread attention because of their ability to cross the BBB, non-toxicity, and potential for drug/gene delivery.
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Affiliation(s)
- Feng Guo
- Public Research Laboratory of Hainan Medical University, Haikou, 571199, People’s Republic of China
| | - Qingman Li
- Public Research Laboratory of Hainan Medical University, Haikou, 571199, People’s Republic of China
| | - Xiaolin Zhang
- Key Laboratory of Child Cognition & Behavior Development of Hainan Province, Qiongtai Normal University, Haikou, 571127, People’s Republic of China
| | - Yiheng Liu
- Haikou Hospital Affiliated to Central South University Xiangya School of Medicine, Haikou, 570208, People’s Republic of China
| | - Jie Jiang
- Scientific Experiment Center of Hainan Medical University, Haikou, 571199, People’s Republic of China
| | - Shuanghuai Cheng
- Public Research Laboratory of Hainan Medical University, Haikou, 571199, People’s Republic of China
| | - Si Yu
- Public Research Laboratory of Hainan Medical University, Haikou, 571199, People’s Republic of China
| | - Xingfang Zhang
- Public Research Laboratory of Hainan Medical University, Haikou, 571199, People’s Republic of China,The First Affiliated Hospital of Hainan Medical College, Haikou, 570102, People’s Republic of China
| | - Fangfang Liu
- Laboratory Department, Nanping First Hospital Affiliated to Fujian Medical University, Fujian, 353006, People’s Republic of China
| | - Yiying Li
- Public Research Laboratory of Hainan Medical University, Haikou, 571199, People’s Republic of China
| | - Gregory Rose
- Departments of Anatomy and Physiology, Southern Illinois University School of Medicine, Carbondale, IL, 62901, USA,Correspondence: Gregory Rose, Departments of Anatomy and Physiology, Southern Illinois University School of Medicine, Carbondale, IL, 62901, USA, Tel +1 618-303-6503, Email
| | - Haiying Zhang
- Public Research Laboratory of Hainan Medical University, Haikou, 571199, People’s Republic of China,Haiying Zhang, Public Research Laboratory of Hainan Medical University, Haikou, 571199, People’s Republic of China, Tel +86 13907533247, Email
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Chang B, Zhang L, Wu S, Sun Z, Cheng Z. Engineering single-atom catalysts toward biomedical applications. Chem Soc Rev 2022; 51:3688-3734. [PMID: 35420077 DOI: 10.1039/d1cs00421b] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Due to inherent structural defects, common nanocatalysts always display limited catalytic activity and selectivity, making it practically difficult for them to replace natural enzymes in a broad scope of biologically important applications. By decreasing the size of the nanocatalysts, their catalytic activity and selectivity will be substantially improved. Guided by this concept, the advances of nanocatalysts now enter an era of atomic-level precise control. Single-atom catalysts (denoted as SACs), characterized by atomically dispersed active sites, strikingly show utmost atomic utilization, precisely located metal centers, unique metal-support interactions and identical coordination environments. Such advantages of SACs drastically boost the specific activity per metal atom, and thus provide great potential for achieving superior catalytic activity and selectivity to functionally mimic or even outperform natural enzymes of interest. Although the size of the catalysts does matter, it is not clear whether the guideline of "the smaller, the better" is still correct for developing catalysts at the single-atom scale. Thus, it is clearly a new, urgent issue to address before further extending SACs into biomedical applications, representing an important branch of nanomedicine. This review begins by providing an overview of recent advances of synthesis strategies of SACs, which serve as a basis for the discussion of emerging achievements in improving the enzyme-like catalytic properties at an atomic level. Then, we carefully compare the structures and functions of catalysts at various scales from nanoparticles, nanoclusters, and few-atom clusters to single atoms. Contrary to conventional wisdom, SACs are not the most catalytically active catalysts in specific reactions, especially those requiring multi-site auxiliary activities. After that, we highlight the unique roles of SACs toward biomedical applications. To appreciate these advances, the challenges and prospects in rapidly growing studies of SACs-related catalytic nanomedicine are also discussed in this review.
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Affiliation(s)
- Baisong Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
| | - Liqin Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
| | - Shaolong Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
| | - Ziyan Sun
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. China.
| | - Zhen Cheng
- State Key Laboratory of Drug Research, Molecular Imaging Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China. .,Bohai rim Advanced Research Institute for Drug Discovery, Yantai, 264000, China.,Molecular Imaging Program at Stanford (MIPS), Department of Radiology and Bio-X Program, Stanford University, California 94305, USA
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Formulation, Characterization and Evaluation against SH-SY5Y Cells of New Tacrine and Tacrine-MAP Loaded with Lipid Nanoparticles. NANOMATERIALS 2020; 10:nano10102089. [PMID: 33096919 PMCID: PMC7589787 DOI: 10.3390/nano10102089] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/29/2020] [Accepted: 10/19/2020] [Indexed: 12/13/2022]
Abstract
Tacrine (TAC) was the first FDA approved drug for the treatment of Alzheimer's disease, resulting in increased memory and enhanced cognitive symptoms in patients. However, long-term therapy presents poor patient compliance associated with undesired side effects such as nausea, vomiting and hepatoxicity. To improve its therapeutic efficacy and decrease toxicity, the use of nanoparticles could be applied as a possible solution to delivery TAC. In this context, a project has been designed to develop a new nanostructured lipid carrier (NLC) as a delivery system for TAC and conjugate TAC and model amphipathic peptide (MAP) to decrease TAC limitations. Different formulations loaded with TAC and TAC + MAP were prepared using a combination of Compritol 888 ATO as the solid lipid and Transcutol HP as the liquid lipid component. Physical characterization was evaluated in terms of particle size, surface charge, encapsulation efficiency and in vitro drug release studies. Particle size distributions within the nanometer range were obtained with encapsulation efficiencies of 72.4% for the TAC and 85.6% for the TAC + MAP conjugate. Furthermore, cytotoxicity of all NLC formulations was determined against neuroblastoma cell line SH-SY5Y. The optimized TAC delivery system revealed low toxicity suggesting this could be a potential carrier system to deliver TAC. However, TAC + MAP conjugated even encapsulated in the NLC system demonstrated toxicity against the SH-SY5Y cell line.
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Tadyszak K, Musiał A, Ostrowski A, Wychowaniec JK. Unraveling Origins of EPR Spectrum in Graphene Oxide Quantum Dots. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E798. [PMID: 32326319 PMCID: PMC7221827 DOI: 10.3390/nano10040798] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/12/2020] [Accepted: 04/17/2020] [Indexed: 01/17/2023]
Abstract
Carbon nanostructures are utilized in a plethora of applications ranging from biomedicine to electronics. Particularly interesting are carbon nanostructured quantum dots that can be simultaneously used for bimodal therapies with both targeting and imaging capabilities. Here, magnetic and optical properties of graphene oxide quantum dots (GOQDs) prepared by the top-down technique from graphene oxide and obtained using the Hummers' method were studied. Graphene oxide was ultra-sonicated, boiled in HNO3, ultra-centrifuged, and finally filtrated, reaching a mean flake size of ~30 nm with quantum dot properties. Flake size distributions were obtained from scanning electron microscopy (SEM) images after consecutive preparation steps. Energy-dispersive X-ray (EDX) confirmed that GOQDs were still oxidized after the fabrication procedure. Magnetic and photoluminescence measurements performed on the obtained GOQDs revealed their paramagnetic behavior and broad range optical photoluminescence around 500 nm, with magnetic moments of 2.41 µB. Finally, electron paramagnetic resonance (EPR) was used to separate the unforeseen contributions and typically not taken into account metal contaminations, and radicals from carbon defects. This study contributes to a better understanding of magnetic properties of carbon nanostructures, which could in the future be used for the design of multimodal imaging agents.
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Affiliation(s)
- Krzysztof Tadyszak
- Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17, 60-179 Poznań, Poland
| | - Andrzej Musiał
- Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17, 60-179 Poznań, Poland
| | - Adam Ostrowski
- Institute of Molecular Physics, Polish Academy of Sciences, ul. Smoluchowskiego 17, 60-179 Poznań, Poland
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Ashrafizadeh M, Mohammadinejad R, Kailasa SK, Ahmadi Z, Afshar EG, Pardakhty A. Carbon dots as versatile nanoarchitectures for the treatment of neurological disorders and their theranostic applications: A review. Adv Colloid Interface Sci 2020; 278:102123. [PMID: 32087367 DOI: 10.1016/j.cis.2020.102123] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 02/08/2020] [Accepted: 02/11/2020] [Indexed: 12/24/2022]
Abstract
The development of novel methods plays a fundamental role in early diagnosis and controlling of neurological disorders (NDs). Blood-brain barrier (BBB) is the most challenging barrier for the development of neuro drug delivery systems due to its inhibiting ability to enter drugs and agents into central nervous system (CNS). Carbon dots (CDs) have shown to be very promising and outstanding agents for various biomedical applications (bio imaging studies, treatment of NDs and brain tumors). They exhibit remarkable properties such as biocompatibility, small size (less than 10 nm, enabling penetration into BBB), tunable optical properties, photostability and simple synthetic procedures, allowing them to act as ideal candidates in various fields of science. Therefore, the objective of this review is to overview the recent studies on CDs for the development of neuro drug delivery systems to reach CNS via crossing of BBB. Primarily, this review briefly outlines the unique optical properties and toxicity of CDs. The development of novel neuro drug delivery systems for various neurological disorders using CDs as carriers is described. This review also covers the potential applications of CDs in brain tumors imaging and treatment of neurodegenerative diseases. Finally, the sensing applications and future prospects of CDs are summarized.
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Mansuriya BD, Altintas Z. Applications of Graphene Quantum Dots in Biomedical Sensors. SENSORS (BASEL, SWITZERLAND) 2020; 20:E1072. [PMID: 32079119 PMCID: PMC7070974 DOI: 10.3390/s20041072] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 01/02/2023]
Abstract
Due to the proliferative cancer rates, cardiovascular diseases, neurodegenerative disorders, autoimmune diseases and a plethora of infections across the globe, it is essential to introduce strategies that can rapidly and specifically detect the ultralow concentrations of relevant biomarkers, pathogens, toxins and pharmaceuticals in biological matrices. Considering these pathophysiologies, various research works have become necessary to fabricate biosensors for their early diagnosis and treatment, using nanomaterials like quantum dots (QDs). These nanomaterials effectively ameliorate the sensor performance with respect to their reproducibility, selectivity as well as sensitivity. In particular, graphene quantum dots (GQDs), which are ideally graphene fragments of nanometer size, constitute discrete features such as acting as attractive fluorophores and excellent electro-catalysts owing to their photo-stability, water-solubility, biocompatibility, non-toxicity and lucrativeness that make them favorable candidates for a wide range of novel biomedical applications. Herein, we reviewed about 300 biomedical studies reported over the last five years which entail the state of art as well as some pioneering ideas with respect to the prominent role of GQDs, especially in the development of optical, electrochemical and photoelectrochemical biosensors. Additionally, we outline the ideal properties of GQDs, their eclectic methods of synthesis, and the general principle behind several biosensing techniques.
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Affiliation(s)
| | - Zeynep Altintas
- Technical University of Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany;
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Sharma S, Singh N, Nepovimova E, Korabecny J, Kuca K, Satnami ML, Ghosh KK. Interaction of synthesized nitrogen enriched graphene quantum dots with novel anti-Alzheimer’s drugs: spectroscopic insights. J Biomol Struct Dyn 2019; 38:1822-1837. [DOI: 10.1080/07391102.2019.1619625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Srishti Sharma
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, India
| | - Namrata Singh
- Ramrao Adik Institute of Technology, DY Patil University, Navi Mumbai, India
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jan Korabecny
- Biomedical Research Centre, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
- National Institute of Mental Health, Klecany, Czech Republic
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Manmohan L. Satnami
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, India
| | - Kallol K. Ghosh
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, India
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Wang M, Sun Y, Yang M. CdS QDs Amplified Electrochemiluminescence of N,S Co-doped Graphene Quantum Dots and Its Application for Pb(II) Determination. CHEM LETT 2018. [DOI: 10.1246/cl.170846] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mingli Wang
- College of Life and Environmental Science, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Yanan Sun
- College of Life and Environmental Science, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Minli Yang
- College of Life and Environmental Science, Shanghai Normal University, Shanghai 200234, P. R. China
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Li Liu M, Chen BB, Yang T, Wang J, Dong Liu X, Zhi Huang C. One-pot carbonization synthesis of europium-doped carbon quantum dots for highly selective detection of tetracycline. Methods Appl Fluoresc 2017; 5:015003. [PMID: 28248640 DOI: 10.1088/2050-6120/aa5e2b] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The detection of tetracycline is of great significance because of its damaging effects on human health, such as renal toxicity and hemolytic anemia. Any release of tetracycline into the surrounding environment can produce bacterial drug resistance. We develop a new sensitive and selective detection approach for tetracycline in complex water samples by preparing europium-doped carbon quantum dots (Eu-CQDs) through a simple and rapid carbonization method operating at 200 °C for 5 min. The Eu-CQDs are characterized by blue photoluminescence, excitation-wavelength-dependent emission and excellent stability. Importantly, the fluorescence of the Eu-CQDs can be quenched efficiently by tetracycline, based on the strong inner filter effect mechanism between Eu-CQDs and tetracycline, making the fluorescence intensity ratio (I 0/I) of the Eu-CQDs at 465 nm correlate linearly with the concentration of tetracycline in the range of 0.5-200 μM, with a limit of detection of 0.3 μM. This shows the broad applicability of the Eu-CQDs in pursuing the concepts of simplicity and specificity for analytical purposes.
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Affiliation(s)
- Meng Li Liu
- Key Laboratory on Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
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14
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Sun L, Li S, Ding W, Yao Y, Yang X, Yao C. Fluorescence detection of cholesterol using a nitrogen-doped graphene quantum dot/chromium picolinate complex-based sensor. J Mater Chem B 2017; 5:9006-9014. [DOI: 10.1039/c7tb02037f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A novel N-GQDs/CrPic-based cholesterol sensor with high sensitivity and selectivity has been constructed.
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Affiliation(s)
- Long Sun
- College of Chemistry and Molecular Engineering, Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Shanshan Li
- College of Chemistry and Molecular Engineering, Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Wei Ding
- College of Chemistry and Molecular Engineering, Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Yuewei Yao
- College of Chemistry and Molecular Engineering, Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Xueyun Yang
- College of Chemistry and Molecular Engineering, Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Cheng Yao
- College of Chemistry and Molecular Engineering, Nanjing Tech University
- Nanjing 211816
- P. R. China
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Kurbanoglu S, Ozkan SA, Merkoçi A. Nanomaterials-based enzyme electrochemical biosensors operating through inhibition for biosensing applications. Biosens Bioelectron 2016; 89:886-898. [PMID: 27818056 DOI: 10.1016/j.bios.2016.09.102] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 09/20/2016] [Accepted: 09/26/2016] [Indexed: 02/08/2023]
Abstract
In recent years great progress has been made in applying nanomaterials to design novel biosensors. Use of nanomaterials offers to biosensing platforms exceptional optical, electronic and magnetic properties. Nanomaterials can increase the surface of the transducing area of the sensors that in turn bring an increase in catalytic behaviors. They have large surface-to-volume ratio, controlled morphology and structure that also favor miniaturization, an interesting advantage when the sample volume is a critical issue. Biosensors have great potential for achieving detect-to-protect devices: devices that can be used in detections of pollutants and other treating compounds/analytes (drugs) protecting citizens' life. After a long term focused scientific and financial efforts/supports biosensors are expected now to fulfill their promise such as being able to perform sampling and analysis of complex samples with interest for clinical or environment fields. Among all types of biosensors, enzymatic biosensors, the most explored biosensing devices, have an interesting property, the inherent inhibition phenomena given the enzyme-substrate complex formation. The exploration of such phenomena is making remarkably important their application as research and applied tools in diagnostics. Different inhibition biosensor systems based on nanomaterials modification has been proposed and applied. The role of nanomaterials in inhibition-based biosensors for the analyses of different groups of drugs as well as contaminants such as pesticides, phenolic compounds and others, are discussed in this review. This deep analysis of inhibition-based biosensors that employ nanomaterials will serve researchers as a guideline for further improvements and approaching of these devices to real sample applications so as to reach society needs and such biosensor market demands.
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Affiliation(s)
- Sevinc Kurbanoglu
- Nanobioelectronics & Biosensors Group, Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra, Barcelona, Spain; Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06100 Tandogan, Ankara, Turkey
| | - Sibel A Ozkan
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry, 06100 Tandogan, Ankara, Turkey
| | - Arben Merkoçi
- Nanobioelectronics & Biosensors Group, Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra, Barcelona, Spain; ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain.
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