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Jin Y, Huang Y, Ren H, Huang H, Lai C, Wang W, Tong Z, Zhang H, Wu W, Liu C, Bao X, Fang W, Li H, Zhao P, Dai X. Nano-enhanced immunotherapy: Targeting the immunosuppressive tumor microenvironment. Biomaterials 2024; 305:122463. [PMID: 38232643 DOI: 10.1016/j.biomaterials.2023.122463] [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: 09/27/2023] [Revised: 12/27/2023] [Accepted: 12/31/2023] [Indexed: 01/19/2024]
Abstract
The tumor microenvironment (TME), which is mostly composed of tumor cells, immune cells, signaling molecules, stromal tissue, and the vascular system, is an integrated system that is conducive to the formation of tumors. TME heterogeneity makes the response to immunotherapy different in different tumors, such as "immune-cold" and "immune-hot" tumors. Tumor-associated macrophages, myeloid-derived suppressor cells, and regulatory T cells are the major suppressive immune cells and their different phenotypes interact and influence cancer cells by secreting different signaling factors, thus playing a key role in the formation of the TME as well as in the initiation, growth, and metastasis of cancer cells. Nanotechnology development has facilitated overcoming the obstacles that limit the further development of conventional immunotherapy, such as toxic side effects and lack of targeting. In this review, we focus on the role of three major suppressive immune cells in the TME as well as in tumor development, clinical trials of different drugs targeting immune cells, and different attempts to combine drugs with nanomaterials. The aim is to reveal the relationship between immunotherapy, immunosuppressive TME and nanomedicine, thus laying the foundation for further development of immunotherapy.
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Affiliation(s)
- Yuzhi Jin
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China
| | - Yangyue Huang
- National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China; Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510315, China
| | - Hui Ren
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China
| | - Huanhuan Huang
- National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China; Postgraduate Training Base Alliance of Wenzhou Medical University, Hangzhou, 310022, China
| | - Chunyu Lai
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China
| | - Wenjun Wang
- Department of Plastic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China
| | - Zhou Tong
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Hangyu Zhang
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Wei Wu
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China
| | - Chuan Liu
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xuanwen Bao
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China
| | - Weijia Fang
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China
| | - Hongjun Li
- National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China; Liangzhu Laboratory, Zhejiang University, Hangzhou, 311121, China; Department of Hepatobiliary and Pancreatic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China.
| | - Peng Zhao
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China.
| | - Xiaomeng Dai
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China; National Key Laboratory of Advanced Drug Delivery and Release Systems, Zhejiang University, Hangzhou, 310058, China.
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Yudin Kharismasari C, Irkham, Zein MIHL, Hardianto A, Nur Zakiyyah S, Umar Ibrahim A, Ozsoz M, Wahyuni Hartati Y. CRISPR/Cas12-based electrochemical biosensors for clinical diagnostic and food monitoring. Bioelectrochemistry 2024; 155:108600. [PMID: 37956622 DOI: 10.1016/j.bioelechem.2023.108600] [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: 08/15/2023] [Revised: 11/04/2023] [Accepted: 11/04/2023] [Indexed: 11/15/2023]
Abstract
Each organism has a unique sequence of nitrogenous bases in in the form of DNA or RNA which distinguish them from other organisms. This characteristic makes nucleic acid-based detection extremely selective and compare to other molecular techniques. In recent years, several nucleic acid-based detection technology methods have been developed, one of which is the electrochemical biosensor. Electrochemical biosensors are known to have high sensitivity and accuracy. In addition, the ease of miniaturization of this electrochemical technique has garnered interest from many researchers. On the other hand, the CRISPR/Cas12 method has been widely used in detecting nucleic acids due to its highly selective nature. The CRISPR/Cas12 method is also reported to increase the sensitivity of electrochemical biosensors through the utilization of modified electrodes. The electrodes can be modified according to detection needs so that the biosensor's performance can be improved. This review discusses the application of CRISPR/Cas12-based electrochemical biosensors, as well as various electrode modifications that have been successfully used to improve the performance of these biosensors in the clinical and food monitoring fields.
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Affiliation(s)
- Clianta Yudin Kharismasari
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjajaran University, Sumedang 45363, Indonesia
| | - Irkham
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjajaran University, Sumedang 45363, Indonesia
| | - Muhammad Ihda H L Zein
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjajaran University, Sumedang 45363, Indonesia
| | - Ari Hardianto
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjajaran University, Sumedang 45363, Indonesia
| | - Salma Nur Zakiyyah
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjajaran University, Sumedang 45363, Indonesia
| | - Abdullahi Umar Ibrahim
- Department of Biomedical Engineering, Near East University, Mersin 99138, Turkey; Operational Research Centre in Healthcare, Near East University, Mersin 10, TRNC, Turkey
| | - Mehmet Ozsoz
- Department of Biomedical Engineering, Near East University, Mersin 99138, Turkey
| | - Yeni Wahyuni Hartati
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjajaran University, Sumedang 45363, Indonesia.
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Wang M, Yue S, Yang Z. Downregulation of PSAT1 inhibits cell proliferation and migration in uterine corpus endometrial carcinoma. Sci Rep 2023; 13:4081. [PMID: 36906716 PMCID: PMC10008565 DOI: 10.1038/s41598-023-31325-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 03/09/2023] [Indexed: 03/13/2023] Open
Abstract
Phosphoserine aminotransferase 1 (PSAT1) has been associated with the occurrence and development of various carcinomas; however, its function in uterine corpus endometrial carcinoma (UCEC) is unknown. We aimed to explore the relationship between PSAT1 and UCEC using The Cancer Genome Atlas database and functional experiments. PSAT1 expression levels in UCEC were employed using the paired sample t-test, Wilcoxon rank-sum test, the Clinical Proteomic Tumor Analysis Consortium database, and the Human Protein Atlas database, while survival curves were constructed using the Kaplan-Meier plotter. We performed Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis to explore the possible functions and related pathways of PSAT1. Furthermore, single-sample gene set enrichment analysis was performed to detect the relationship between PSAT1 and tumor immune infiltration. StarBase and quantitative PCR were used to predict and verify the interactions between miRNAs and PSAT1. The Cell Counting Kit-8, EdU assay, clone formation assay, western blotting and flow cytometry were used to evaluate cell proliferation. Finally, Transwell and Wound healing assays were used to assess cell invasion and migration. Our study found that PSAT1 was significantly overexpressed in UCEC, and this high expression was associated with a worse prognosis. A high level of PSAT1 expression was associated with a late clinical stage and, histological type. In addition, the results of GO and KEGG enrichment analysis showed that PSAT1 was mainly involved in the regulation of cell growth, immune system and cell cycle in UCEC. In addition, PSAT1 expression was positively correlated with Th2 cells and negatively correlated with Th17 cells. Furthermore, we also found that miR-195-5P negatively regulated the expression of PSAT1 in UCEC. Finally, the knockdown of PSAT1 resulted in the inhibition of cell proliferation, migration, and invasion in vitro. Overall, PSAT1 was identified as a potential target for the diagnosis and immunotherapy of UCEC.
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Affiliation(s)
- Min Wang
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Song Yue
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Zhu Yang
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China.
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Amadi EV, Venkataraman A, Papadopoulos C. Nanoscale self-assembly: concepts, applications and challenges. NANOTECHNOLOGY 2022; 33. [PMID: 34874297 DOI: 10.1088/1361-6528/ac3f54] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 12/02/2021] [Indexed: 05/09/2023]
Abstract
Self-assembly offers unique possibilities for fabricating nanostructures, with different morphologies and properties, typically from vapour or liquid phase precursors. Molecular units, nanoparticles, biological molecules and other discrete elements can spontaneously organise or form via interactions at the nanoscale. Currently, nanoscale self-assembly finds applications in a wide variety of areas including carbon nanomaterials and semiconductor nanowires, semiconductor heterojunctions and superlattices, the deposition of quantum dots, drug delivery, such as mRNA-based vaccines, and modern integrated circuits and nanoelectronics, to name a few. Recent advancements in drug delivery, silicon nanoelectronics, lasers and nanotechnology in general, owing to nanoscale self-assembly, coupled with its versatility, simplicity and scalability, have highlighted its importance and potential for fabricating more complex nanostructures with advanced functionalities in the future. This review aims to provide readers with concise information about the basic concepts of nanoscale self-assembly, its applications to date, and future outlook. First, an overview of various self-assembly techniques such as vapour deposition, colloidal growth, molecular self-assembly and directed self-assembly/hybrid approaches are discussed. Applications in diverse fields involving specific examples of nanoscale self-assembly then highlight the state of the art and finally, the future outlook for nanoscale self-assembly and potential for more complex nanomaterial assemblies in the future as technological functionality increases.
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Affiliation(s)
- Eberechukwu Victoria Amadi
- University of Victoria, Department of Electrical and Computer Engineering, PO BOX 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - Anusha Venkataraman
- University of Victoria, Department of Electrical and Computer Engineering, PO BOX 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - Chris Papadopoulos
- University of Victoria, Department of Electrical and Computer Engineering, PO BOX 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
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Metal–organic frameworks (MOFs) based electrochemical biosensors for early cancer diagnosis in vitro. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213948] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Hu Y, Chen Y, Tang Q, Liu H. A sandwich-type ECL immunosensor for the sensitive determination of CEA content based on red emission carbon quantum dots as luminophores. NEW J CHEM 2021. [DOI: 10.1039/d1nj01002f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A novel electrochemiluminescent immunosensor was constructed based on the quenching effect between red emission carbon quantum dots and aminated graphene.
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Affiliation(s)
- Yuefang Hu
- College of Materials and Chemical Engineering
- Hezhou University
- Hezhou
- China
| | - Yuxin Chen
- Faculty of Chinese Medicine Science, Guangxi University of Chinese Medicine
- Nanning
- China
| | - Quan Tang
- College of Materials and Chemical Engineering
- Hezhou University
- Hezhou
- China
| | - Hanfu Liu
- College of Pharmacy, Guilin Medical University
- Guilin
- China
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Wang W, Wang Q, Xie H, Wu D, Gan N. A universal assay strategy for sensitive and simultaneous quantitation of multiplex tumor markers based on the stirring rod-immobilized DNA-LaMnO 3 perovskite-metal ions encoded probes. Talanta 2020; 222:121456. [PMID: 33167200 DOI: 10.1016/j.talanta.2020.121456] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/19/2020] [Accepted: 07/23/2020] [Indexed: 01/08/2023]
Abstract
It was extremely urgent to develop some simultaneous and sensitive biosensors for detecting multiplex serum tumor markers (TMs) for early screening of cancers. Herein, a multiplex assay was developed based on the DNA-LaMnO3 (DNA-LMO) perovskite encoded probes and targets mediated competitive replacement strategy. Alpha fetoprotein (AFP), carcinoembryonic antigen (CEA) and prostate specific antigen (PSA) markers were employed as representative target TMs. Aptasensor is prepared by a series of DNA-LMO-M encode probes which were prepared by three hyperbranched DNA firstly immobilized on LMO encapsulating Pb, Cd or Cu ions. Then, three TMs aptamers were labeled on the stirring-rod and hybridized with the probes. After the developed encoded probes was incubated the TMs, the encoded probes corresponding to different TMs can be released into the supernatant through the competitive replacement. The inner metal ion can be simultaneously detected by square wave voltammetry corresponding to various TMs. Since the stirring rod can enrich many encoded probes containing a lot of metal ions, multiplex signal amplification can be realized. Due to the enrichment and easy separation of the stirring rod, the signal-to-noise ratio was also obviously improved and thus to results in good sensitivity and accuracy. Moreover, it took only 20 min to detect three targets which much faster than many same types of aptasensor. Under the optimal conditions, the low detection limit for CEA (3.6 × 10-4 ng/mL), AFP (3.4 × 10-4 ng/mL) and PSA (2.8 × 10-4 ng/mL) were obtained. Therefore, this method is likely to be used for early and sensitive screening of tumors.
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Affiliation(s)
- Wenhai Wang
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Qiqin Wang
- Institute of Pharmaceutical Analysis, College of Pharmacy, Jinan University, Guangzhou, 510632, China
| | - Hongzhen Xie
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Dazhen Wu
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Ning Gan
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
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Saghaeian Jazi M. A Mini-Review of Nanotechnology and Prostate Cancer: Approaches in Early Diagnosis. JOURNAL OF CLINICAL AND BASIC RESEARCH 2020. [DOI: 10.29252/jcbr.4.1.21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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9
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Li C, Ma X, Guan Y, Tang J, Zhang B. Microcantilever Array Biosensor for Simultaneous Detection of Carcinoembryonic Antigens and α-Fetoprotein Based on Real-Time Monitoring of the Profile of Cantilever. ACS Sens 2019; 4:3034-3041. [PMID: 31642312 DOI: 10.1021/acssensors.9b01604] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A microcantilever array biosensor based on a sandwich structure has been developed for simultaneously measuring two biomarkers carcinoembryonic antigen (CEA) and α-fetoprotein (AFP) via an optical readout technique-real-time monitoring of the profile of cantilever. First, the aptamers of CEA and AFP were self-assembled on their respective cantilevers. After the adsorption of the mixture of CEA and AFP, further specific interaction was performed via the addition of the antibodies specific to each target. The compressive stress on the cantilever was generated by the aptamer-antigen-antibody sandwich structure formed on the gold surface, resulting in cantilever bending. The profile of cantilever could be monitored in real time. The relationship between the deflection value at the 90% position of the cantilever and the target concentration served as a calibration curve, and the detection sensitivity was 1.3 ng/mL for CEA and 0.6 ng/mL for AFP, respectively. This work demonstrated the ability of simultaneously measuring two biomarkers via a microcantilever array biosensor, giving great potential for further application in detecting several targets simultaneously for early clinical diagnosis.
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Affiliation(s)
- Chen Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Xingxing Ma
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yanxue Guan
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Jilin Tang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Bailin Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
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Lah ZMANH, Ahmad SAA, Zaini MS, Kamarudin MA. An Electrochemical Sandwich Immunosensor for the Detection of HER2 using Antibody-Conjugated PbS Quantum Dot as a label. J Pharm Biomed Anal 2019; 174:608-617. [PMID: 31265987 DOI: 10.1016/j.jpba.2019.06.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 05/28/2019] [Accepted: 06/19/2019] [Indexed: 01/20/2023]
Abstract
A facile electrochemical sandwich immunosensor for the detection of a breast cancer biomarker, the human epidermal growth factor receptor 2 (HER2), was designed, using lead sulfide quantum dots-conjugated secondary HER2 antibody (Ab2-PbS QDs) as a label. Using Ab2-PbS QDs in the development of electrochemical immunoassays leads to many advantages such as straightforward synthesis and well-defined stripping signal of Pb(II) through acid dissolution, which in turn yields better sensing performance for the sandwiched immunosensor. In the bioconjugation of PbS QDs, the available amine and hydroxyl groups from secondary anti-HER2 and capped PbS QDs were bound covalently together via carbonyldiimidazole (CDI) acting as a linker. In order to quantify the biomarker, SWV signal was obtained, where the Pb2+ ions after acid dissolution in HCl was detected. The plated mercury film SPCE was also detected in situ. Under optimal conditions, HER2 was detected in a linear range from 1-100 ng/mL with a limit of detection of 0.28 ng/mL. The measures of satisfactory recoveries were 91.3% to 104.3% for the spiked samples, displaying high selectivity. Therefore, this method can be applied to determine HER2 in human serum.
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Affiliation(s)
| | - Shahrul Ainliah Alang Ahmad
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia; Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia.
| | - Muhammad Safwan Zaini
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia
| | - Mazliana Ahmad Kamarudin
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia
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11
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Vallamkondu J, Corgiat EB, Buchaiah G, Kandimalla R, Reddy PH. Liquid Crystals: A Novel Approach for Cancer Detection and Treatment. Cancers (Basel) 2018; 10:E462. [PMID: 30469457 PMCID: PMC6267481 DOI: 10.3390/cancers10110462] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/02/2018] [Accepted: 11/05/2018] [Indexed: 11/23/2022] Open
Abstract
Liquid crystals are defined as the fourth state of matter forming between solid and liquid states. Earlier the applications of liquid crystals were confined to electronic instruments, but recent research findings suggest multiple applications of liquid crystals in biology and medicine. Here, the purpose of this review article is to discuss the potential biological impacts of liquid crystals in the diagnosis and prognosis of cancer along with the risk assessment. In this review, we also discussed the recent advances of liquid crystals in cancer biomarker detection and treatment in multiple cell line models. Cases reviewed here will demonstrate that cancer diagnostics based on the multidisciplinary technology and intriguingly utilization of liquid crystals may become an alternative to regular cancer detection methodologies. Additionally, we discussed the formidable challenges and problems in applying liquid crystal technologies. Solving these problems will require great effort and the way forward is through the multidisciplinary collaboration of physicists, biologists, chemists, material-scientists, clinicians, and engineers. The triumphant outcome of these liquid crystals and their applications in cancer research would be convenient testing for the detection of cancer and may result in treating the cancer patients non-invasively.
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Affiliation(s)
- Jayalakshmi Vallamkondu
- Department of Physics, NIT Warangal, Telangana 506004, India.
- Centre for Advanced Materials, NIT Warangal, Telangana 506004, India.
| | - Edwin Bernard Corgiat
- Department of Cellular Biology, Emory University School of Medicine, Atlanta, GA 30322, USA.
| | | | - Ramesh Kandimalla
- Garrison Institute on Aging, Texas Tech University Health Sciences Center, 3601 4th Street, MS 9424, Lubbock, TX 79430, USA.
- Neurology Department, Texas Tech University Health Sciences Center, 3601 4th Street, MS 9424, Lubbock, TX 79430, USA.
| | - P Hemachandra Reddy
- Garrison Institute on Aging, Texas Tech University Health Sciences Center, 3601 4th Street, MS 9424, Lubbock, TX 79430, USA.
- Neurology Department, Texas Tech University Health Sciences Center, 3601 4th Street, MS 9424, Lubbock, TX 79430, USA.
- Pharmacology and Neuroscience Department, Texas Tech University Health Sciences Center, 3601 4th Street, MS 9424, Lubbock, TX 79430, USA.
- Garrison Institute on Aging, South West Campus, Texas Tech University Health Sciences Center, 6630 S. Quaker Suite E, MS 7495, Lubbock, TX 79413, USA.
- Cell Biology and Biochemistry Department, Texas Tech University Health Sciences Center, 3601 4th Street, MS 9424, Lubbock, TX 79430, USA.
- Speech, Language and Hearing Sciences Department, Texas Tech University Health Sciences Center, 3601 4th Street, MS 9424, Lubbock, TX 79430, USA.
- Department of Public Health, Graduate School of Biomedical Sciences, 3601 4th Street, MS 9424, Lubbock, TX 79430, USA.
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12
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Silva MLS. Lectin-based biosensors as analytical tools for clinical oncology. Cancer Lett 2018; 436:63-74. [PMID: 30125611 DOI: 10.1016/j.canlet.2018.08.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/07/2018] [Accepted: 08/08/2018] [Indexed: 12/17/2022]
Abstract
The review focus on the use of lectin-based biosensors in the oncology field, and ponders the potentialities of using these devices as analytical tools to monitor the levels of cancer glycobiomarkers in biological fluids, helping in the diagnosis, prognosis and treatment assessment. Several examples of lectin-based biosensors directed for cancer biomarkers are described and discussed, and their potential application in the clinic is considered, taking into account their analytical features, advantages and performance in sample analysis. Technical and practical aspects in the construction process, which are specific for lectin biosensors, are debated, as well as the requirements in sample collection and processing, and biosensor validation. Today's challenges for real implementation of these devices in the clinic are presented, along with the future trends in the field.
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Affiliation(s)
- M Luísa S Silva
- Centre of Chemical Research, Autonomous University of Hidalgo State, Carr. Pachuca-Tulancingo Km 4.5, 42076, Pachuca, Hidalgo, Mexico; LAQV/REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy of the University of Porto, Rua Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal.
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13
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Viñambres M, Filice M, Marciello M. Modulation of the Catalytic Properties of Lipase B from Candida antarctica by Immobilization on Tailor-Made Magnetic Iron Oxide Nanoparticles: The Key Role of Nanocarrier Surface Engineering. Polymers (Basel) 2018; 10:E615. [PMID: 30966649 PMCID: PMC6404122 DOI: 10.3390/polym10060615] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/27/2018] [Accepted: 05/30/2018] [Indexed: 11/16/2022] Open
Abstract
The immobilization of biocatalysts on magnetic nanomaterial surface is a very attractive alternative to achieve enzyme nanoderivatives with highly improved properties. The combination between the careful tailoring of nanocarrier surfaces and the site-specific chemical modification of biomacromolecules is a crucial parameter to finely modulate the catalytic behavior of the biocatalyst. In this work, a useful strategy to immobilize chemically aminated lipase B from Candida antarctica on magnetic iron oxide nanoparticles (IONPs) by covalent multipoint attachment or hydrophobic physical adsorption upon previous tailored engineering of nanocarriers with poly-carboxylic groups (citric acid or succinic anhydride, CALBEDA@CA-NPs and CALBEDA@SA-NPs respectively) or hydrophobic layer (oleic acid, CALBEDA@OA-NPs) is described. After full characterization, the nanocatalysts have been assessed in the enantioselective kinetic resolution of racemic methyl mandelate. Depending on the immobilization strategy, each enzymatic nanoderivative permitted to selectively improve a specific property of the biocatalyst. In general, all the immobilization protocols permitted loading from good to high lipase amount (149 < immobilized lipase < 234 mg/gFe). The hydrophobic CALBEDA@OA-NPs was the most active nanocatalyst, whereas the covalent CALBEDA@CA-NPs and CALBEDA@SA-NPs were revealed to be the most thermostable and also the most enantioselective ones in the kinetic resolution reaction (almost 90% ee R-enantiomer). A strategy to maintain all these properties in long-time storage (up to 1 month) by freeze-drying was also optimized. Therefore, the nanocarrier surface engineering is demonstrated to be a key-parameter in the design and preparation of lipase libraries with enhanced catalytic properties.
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Affiliation(s)
- Mario Viñambres
- Department of Biomaterials and Bioinspired Material, Materials Science Institute of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, Cantoblanco, 28049 Madrid, Spain.
| | - Marco Filice
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University (UCM), Plaza Ramón y Cajal, 28040 Madrid, Spain.
- National Research Centre for Cardiovascular Disease (CNIC), C/Melchor Fernández-Almagro 3, 28029 Madrid, Spain.
- Biomedical Research Networking Center for Respiratory Diseases (CIBERES), C/Melchor Fernández-Almagro 3, 28029 Madrid, Spain.
| | - Marzia Marciello
- Department of Biomaterials and Bioinspired Material, Materials Science Institute of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, Cantoblanco, 28049 Madrid, Spain.
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14
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Preparation, Modification, Characterization, and Biosensing Application of Nanoporous Gold Using Electrochemical Techniques. NANOMATERIALS 2018; 8:nano8030171. [PMID: 29547580 PMCID: PMC5869662 DOI: 10.3390/nano8030171] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 03/13/2018] [Accepted: 03/13/2018] [Indexed: 12/21/2022]
Abstract
Nanoporous gold (np-Au), because of its high surface area-to-volume ratio, excellent conductivity, chemical inertness, physical stability, biocompatibility, easily tunable pores, and plasmonic properties, has attracted much interested in the field of nanotechnology. It has promising applications in the fields of catalysis, bio/chemical sensing, drug delivery, biomolecules separation and purification, fuel cell development, surface-chemistry-driven actuation, and supercapacitor design. Many chemical and electrochemical procedures are known for the preparation of np-Au. Recently, researchers are focusing on easier and controlled ways to tune the pores and ligaments size of np-Au for its use in different applications. Electrochemical methods have good control over fine-tuning pore and ligament sizes. The np-Au electrodes that are prepared using electrochemical techniques are robust and are easier to handle for their use in electrochemical biosensing. Here, we review different electrochemical strategies for the preparation, post-modification, and characterization of np-Au along with the synergistic use of both electrochemistry and np-Au for applications in biosensing.
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15
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Velmanickam L, Fondakowski M, Nawarathna D. Integrated dielectrophoresis and fluorescence-based platform for biomarker detection from serum samples. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aaa516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Liu A, Shan H, Ma M, Shangguan L, Jiang K, Shi M, Zhao Y, Liu S, Li S. An ultrasensitive photoelectrochemical immunosensor by integration of nanobody, TiO 2 nanorod arrays and ZnS nanoparticles for the detection of tumor necrosis factor-α. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.09.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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17
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Rajamanickam V, Krippl M, Herwig C, Spadiut O. An automated data-driven DSP development approach for glycoproteins from yeast. Electrophoresis 2017; 38:2886-2891. [DOI: 10.1002/elps.201700229] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 07/24/2017] [Accepted: 07/28/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Vignesh Rajamanickam
- Research Division Biochemical Engineering; Institute of Chemical, Environmental and Biological Engineering; TU Wien Vienna Austria
- Christian Doppler Laboratory for Mechanistic and Physiological Methods for Improved Bioprocesses; Institute of Chemical; Environmental and Biological Engineering; TU Wien Vienna Austria
| | - Maximillian Krippl
- Research Division Biochemical Engineering; Institute of Chemical, Environmental and Biological Engineering; TU Wien Vienna Austria
| | - Christoph Herwig
- Research Division Biochemical Engineering; Institute of Chemical, Environmental and Biological Engineering; TU Wien Vienna Austria
- Christian Doppler Laboratory for Mechanistic and Physiological Methods for Improved Bioprocesses; Institute of Chemical; Environmental and Biological Engineering; TU Wien Vienna Austria
| | - Oliver Spadiut
- Research Division Biochemical Engineering; Institute of Chemical, Environmental and Biological Engineering; TU Wien Vienna Austria
- Christian Doppler Laboratory for Mechanistic and Physiological Methods for Improved Bioprocesses; Institute of Chemical; Environmental and Biological Engineering; TU Wien Vienna Austria
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18
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Dual-channel probe of carbon dots cooperating with gold nanoclusters employed for assaying multiple targets. Biosens Bioelectron 2017; 91:566-573. [DOI: 10.1016/j.bios.2017.01.014] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 01/05/2017] [Accepted: 01/06/2017] [Indexed: 11/22/2022]
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19
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Kirmani SAM, Gudagunti FD, Velmanickam L, Nawarathna D, Lima IT. Negative dielectrophoresis spectroscopy for rare analyte quantification in biological samples. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:37006. [PMID: 28358942 DOI: 10.1117/1.jbo.22.3.037006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/14/2017] [Indexed: 06/07/2023]
Abstract
We propose the use of negative dielectrophoresis (DEP) spectroscopy as a technique to improve the detection limit of rare analytes in biological samples. We observe a significant dependence of the negative DEP force on functionalized polystyrene beads at the edges of interdigitated electrodes with respect to the frequency of the electric field. We measured this velocity of repulsion for 0% and 0.8% conjugation of avidin with biotin functionalized polystyrene beads with our automated software through real-time image processing that monitors the Rayleigh scattering from the beads. A significant difference in the velocity of the beads was observed in the presence of as little as 80 molecules of avidin per biotin functionalized bead. This technology can be applied in the detection and quantification of rare analytes that can be useful in the diagnosis and the treatment of diseases, such as cancer and myocardial infarction, with the use of polystyrene beads functionalized with antibodies for the target biomarkers.
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Affiliation(s)
- Syed Abdul Mannan Kirmani
- North Dakota State University, Electrical and Computer Engineering Department, Fargo, North Dakota, United StatesbCOMSATS Institute of Information Technology, Center for Advanced Studies in Telecommunication, Islamabad, Pakistan
| | - Fleming Dackson Gudagunti
- North Dakota State University, Electrical and Computer Engineering Department, Fargo, North Dakota, United States
| | - Logeeshan Velmanickam
- North Dakota State University, Electrical and Computer Engineering Department, Fargo, North Dakota, United States
| | - Dharmakeerthi Nawarathna
- North Dakota State University, Electrical and Computer Engineering Department, Fargo, North Dakota, United States
| | - Ivan T Lima
- North Dakota State University, Electrical and Computer Engineering Department, Fargo, North Dakota, United States
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20
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Liu L, Zhang L, Dai Z, Tian Y. A simple functional carbon nanotube fiber for in vivo monitoring of NO in a rat brain following cerebral ischemia. Analyst 2017; 142:1452-1458. [DOI: 10.1039/c7an00138j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A simple ratiometric electrochemical biosensor for NO monitoring in rat brain following cerebral ischemia was developed based on a carbon nanotube fiber modified with hemin.
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Affiliation(s)
- Li Liu
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials
- School of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Limin Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
| | - Zhihui Dai
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials
- School of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Yang Tian
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
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21
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Miao H, Wang L, Zhuo Y, Zhou Z, Yang X. Label-free fluorimetric detection of CEA using carbon dots derived from tomato juice. Biosens Bioelectron 2016; 86:83-89. [DOI: 10.1016/j.bios.2016.06.043] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/13/2016] [Accepted: 06/14/2016] [Indexed: 11/17/2022]
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22
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Nanocomposites of graphene and graphene oxides: Synthesis, molecular functionalization and application in electrochemical sensors and biosensors. A review. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-2007-0] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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Velmanickam L, Laudenbach D, Nawarathna D. Dielectrophoretic label-free immunoassay for rare-analyte quantification in biological samples. Phys Rev E 2016; 94:042408. [PMID: 27841465 DOI: 10.1103/physreve.94.042408] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Indexed: 06/06/2023]
Abstract
The current gold standard for detecting or quantifying target analytes from blood samples is the ELISA (enzyme-linked immunosorbent assay). The detection limit of ELISA is about 250 pg/ml. However, to quantify analytes that are related to various stages of tumors including early detection requires detecting well below the current limit of the ELISA test. For example, Interleukin 6 (IL-6) levels of early oral cancer patients are <100 pg/ml and the prostate specific antigen level of the early stage of prostate cancer is about 1 ng/ml. Further, it has been reported that there are significantly less than 1pg/mL of analytes in the early stage of tumors. Therefore, depending on the tumor type and the stage of the tumors, it is required to quantify various levels of analytes ranging from ng/ml to pg/ml. To accommodate these critical needs in the current diagnosis, there is a need for a technique that has a large dynamic range with an ability to detect extremely low levels of target analytes (<pg/ml). To address this gap, we here report on a label-free, high-throughput technique based on dielectrophoresis. This technique is capable of quantifying target analytes down to a few thousands of molecules (∼zmoles).
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Affiliation(s)
- Logeeshan Velmanickam
- Department of Electrical and Computer Engineering, North Dakota State University, Fargo, North Dakota, 58102-6050, USA
| | - Darrin Laudenbach
- Department of Electrical and Computer Engineering, North Dakota State University, Fargo, North Dakota, 58102-6050, USA
| | - Dharmakeerthi Nawarathna
- Department of Electrical and Computer Engineering, North Dakota State University, Fargo, North Dakota, 58102-6050, USA
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24
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Graphene-Iodine Nanocomposites: Highly Potent Bacterial Inhibitors that are Bio-compatible with Human Cells. Sci Rep 2016; 6:20015. [PMID: 26843066 PMCID: PMC4740772 DOI: 10.1038/srep20015] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 11/16/2015] [Indexed: 11/16/2022] Open
Abstract
Graphene-composites, capable of inhibiting bacterial growth which is also bio-compatible with human cells have been highly sought after. Here we report for the first time the preparation of new graphene-iodine nano-composites via electrostatic interactions between positively charged graphene derivatives and triiodide anions. The resulting composites were characterized by X-ray photoemission spectroscopy, UV-spectroscopy, Raman spectroscopy and Scanning electron microscopy. The antibacterial potential of these graphene-iodine composites against Klebsiella pneumonia, Pseudomonas aeruginosa, Proteus mirobilis, Staphylococcus aureus, and E. coli was investigated. In addition, the cytotoxicity of the nanocomposite with human cells [human white blood cells (WBC), HeLa, MDA-MB-231, Fibroblast (primary human keratinocyte) and Keratinocyte (immortalized fibroblast)], was assessed. DGO (Double-oxidizes graphene oxide) was prepared by the additional oxidation of GO (graphene oxide). This generates more oxygen containing functional groups that can readily trap more H+, thus generating a positively charged surface area under highly acidic conditions. This step allowed bonding with a greater number of anionic triiodides and generated the most potent antibacterial agent among graphene-iodine and as-made povidone-iodine (PVP-I) composites also exhibited nontoxic to human cells culture. Thus, these nano-composites can be used to inhibit the growth of various bacterial species. Importantly, they are also very low-cytotoxic to human cells culture.
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25
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Fabrication of graphene/gold-modified screen-printed electrode for detection of carcinoembryonic antigen. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:666-74. [DOI: 10.1016/j.msec.2015.09.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/21/2015] [Accepted: 09/03/2015] [Indexed: 11/22/2022]
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26
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Su HW, Lee MJ, Lee W. Surface modification of alignment layer by ultraviolet irradiation to dramatically improve the detection limit of liquid-crystal-based immunoassay for the cancer biomarker CA125. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:57004. [PMID: 26000796 DOI: 10.1117/1.jbo.20.5.057004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 05/04/2015] [Indexed: 05/05/2023]
Abstract
Liquid crystal (LC)-based biosensing has attracted much attention in recent years. We focus on improving the detection limit of LC-based immunoassay techniques by surface modification of the surfactant alignment layer consisting of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride (DMOAP). The cancer biomarker CA125 was detected with an array of anti-CA125 antibodies immobilized on the ultraviolet (UV)-modified DMOAP monolayer. Compared with a pristine counterpart, UV irradiation enhanced the binding affinity of the CA125 antibody and reproducibility of immunodetection in which a detection limit of 0.01 ng∕ml for the cancer biomarker CA125 was achieved. Additionally, the optical texture observed under a crossed polarized microscope was correlated with the analyte concentration. In a proof-of-concept experiment using CA125-spiked human serum as the analyte, specific binding between the CA125 antigen and the anti-CA125 antibody resulted in a distinct and concentration-dependent optical response despite the high background caused by nonspecific binding of other biomolecules in the human serum. Results from this study indicate that UVmodification of the alignment layer, as well as detection with LCs of large birefringence, contributes to the enhanced performance of the label-free LC-based immunodetection, which may be considered a promising alternative to conventional label-based methods.
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Affiliation(s)
- Hui-Wen Su
- National Chiao Tung University, Institute of Imaging and Biomedical Photonics, College of Photonics, Guiren District, Tainan 71150, Taiwan
| | - Mon-Juan Lee
- Chang Jung Christian University, Department of Bioscience Technology, Guiren District, Tainan 71101, Taiwan
| | - Wei Lee
- National Chiao Tung University, Institute of Imaging and Biomedical Photonics, College of Photonics, Guiren District, Tainan 71150, Taiwan
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27
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Wu C, Bronder T, Poghossian A, Werner CF, Schöning MJ. Label-free detection of DNA using a light-addressable potentiometric sensor modified with a positively charged polyelectrolyte layer. NANOSCALE 2015; 7:6143-50. [PMID: 25771844 DOI: 10.1039/c4nr07225a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A multi-spot (16 spots) light-addressable potentiometric sensor (MLAPS) consisting of an Al-p-Si-SiO2 structure modified with a weak polyelectrolyte layer of PAH (poly(allylamine hydrochloride)) was applied for the label-free electrical detection of DNA (deoxyribonucleic acid) immobilization and hybridization by the intrinsic molecular charge for the first time. To achieve a preferentially flat orientation of DNA strands and thus, to reduce the distance between the DNA charge and MLAPS surface, the negatively charged probe single-stranded DNAs (ssDNA) were electrostatically adsorbed onto the positively charged PAH layer using a simple layer-by-layer (LbL) technique. In this way, more DNA charge can be positioned within the Debye length, yielding a higher sensor signal. The surface potential changes in each spot induced due to the surface modification steps (PAH adsorption, probe ssDNA immobilization, hybridization with complementary target DNA (cDNA), non-specific adsorption of mismatched ssDNA) were determined from the shifts of photocurrent-voltage curves along the voltage axis. A high sensor signal of 83 mV was registered after immobilization of probe ssDNA onto the PAH layer. The hybridization signal increases from 5 mV to 32 mV with increasing the concentration of cDNA from 0.1 nM to 5 μM. In contrast, a small signal of 5 mV was recorded in the case of non-specific adsorption of fully mismatched ssDNA (5 μM). The obtained results demonstrate the potential of the MLAPS in combination with the simple and rapid LbL immobilization technique as a promising platform for the future development of multi-spot light-addressable label-free DNA chips with direct electrical readout.
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Affiliation(s)
- Chunsheng Wu
- Institute of Nano- and Biotechnologies, FH Aachen, Campus Jülich, 52428 Jülich, Germany.
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28
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Paleček E, Tkáč J, Bartošík M, Bertók T, Ostatná V, Paleček J. Electrochemistry of nonconjugated proteins and glycoproteins. Toward sensors for biomedicine and glycomics. Chem Rev 2015; 115:2045-108. [PMID: 25659975 PMCID: PMC4360380 DOI: 10.1021/cr500279h] [Citation(s) in RCA: 214] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Indexed: 02/07/2023]
Affiliation(s)
- Emil Paleček
- Institute
of Biophysics Academy of Science of the Czech Republic, v.v.i., Královopolská
135, 612 65 Brno, Czech Republic
| | - Jan Tkáč
- Institute
of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Martin Bartošík
- Regional
Centre for Applied Molecular Oncology, Masaryk
Memorial Cancer Institute, Žlutý kopec 7, 656 53 Brno, Czech Republic
| | - Tomáš Bertók
- Institute
of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Veronika Ostatná
- Institute
of Biophysics Academy of Science of the Czech Republic, v.v.i., Královopolská
135, 612 65 Brno, Czech Republic
| | - Jan Paleček
- Central
European Institute of Technology, Masaryk
University, Kamenice
5, 625 00 Brno, Czech Republic
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29
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Krainer FW, Glieder A. An updated view on horseradish peroxidases: recombinant production and biotechnological applications. Appl Microbiol Biotechnol 2015; 99:1611-25. [PMID: 25575885 PMCID: PMC4322221 DOI: 10.1007/s00253-014-6346-7] [Citation(s) in RCA: 127] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 12/19/2014] [Accepted: 12/21/2014] [Indexed: 11/28/2022]
Abstract
Horseradish peroxidase has been the subject of scientific research for centuries. It has been used exhaustively as reporter enzyme in diagnostics and histochemistry and still plays a major role in these applications. Numerous studies have been conducted on the role of horseradish peroxidase in the plant and its catalytic mechanism. However, little progress has been made in its recombinant production. Until now, commercial preparations of horseradish peroxidase are still isolated from plant roots. These preparations are commonly mixtures of various isoenzymes of which only a small fraction has been described so far. The composition of isoenzymes in these mixed isolates is subjected to uncontrollable environmental conditions. Nowadays, horseradish peroxidase regains interest due to its broad applicability in the fields of medicine, life sciences, and biotechnology in cancer therapy, biosensor systems, bioremediation, and biocatalysis. These medically and commercially relevant applications, the recent discovery of new natural isoenzymes with different biochemical properties, as well as the challenges in recombinant production render this enzyme particularly interesting for future biotechnological solutions. Therefore, we reviewed previous studies as well as current developments with biotechnological emphasis on new applications and the major remaining biotechnological challenge—the efficient recombinant production of horseradish peroxidase enzymes.
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Affiliation(s)
- Florian W Krainer
- Institute of Molecular Biotechnology, NAWI Graz, Graz University of Technology, Petersgasse 14, 8010, Graz, Austria,
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30
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Das R, Upadhyay S, Sharma MK, Shaik M, Rao VK, Srivastava DN. Controllable gold nanoparticle deposition on carbon nanotubes and their application in immunosensing. RSC Adv 2015. [DOI: 10.1039/c5ra07990j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A CNT–AuNPs hybrid nanocomposite platform was prepared from nanodisperse AuNPs in N-[3-(trimethoxysilyl)propyl]ethylenediamine (EDAS) sol–gel matrices with purified MWCNT.
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Affiliation(s)
- Ritu Das
- Defence Research and Development Establishment
- Gwalior-474002
- India
| | - Sanjay Upadhyay
- Defence Research and Development Establishment
- Gwalior-474002
- India
| | - Mukesh K. Sharma
- Defence Research and Development Establishment
- Gwalior-474002
- India
| | - M. Shaik
- Defence Research and Development Establishment
- Gwalior-474002
- India
| | - V. K. Rao
- Defence Research and Development Establishment
- Gwalior-474002
- India
| | - Divesh N. Srivastava
- Analytical Discipline & Centralized Instrument Facility
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364021
- India
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31
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Pihíková D, Kasák P, Tkac J. Glycoprofiling of cancer biomarkers: Label-free electrochemical lectin-based biosensors. OPEN CHEM 2015; 13:636-655. [PMID: 27275016 PMCID: PMC4892350 DOI: 10.1515/chem-2015-0082] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Glycosylation of biomolecules is one of the most prevalent post- and co-translational modification in a human body, with more than half of all human proteins being glycosylated. Malignant transformation of cells influences glycosylation machinery resulting in subtle changes of the glycosylation pattern within the cell populations as a result of cancer. Thus, an altered terminal glycan motif on glycoproteins could provide a warning signal about disease development and progression and could be applied as a reliable biomarker in cancer diagnostics. Among all highly effective glycoprofiling tools, label-free electrochemical impedance spectroscopy (EIS)-based biosensors have emerged as especially suitable tool for point-of-care early-stage cancer detection. Herein, we highlight the current challenges in glycoprofiling of various cancer biomarkers by ultrasensitive impedimetric-based biosensors with low sample consumption, low cost fabrication and simple miniaturization. Additionally, this review provides a short introduction to the field of glycomics and lectinomics and gives a brief overview of glycan alterations in different types of cancer.
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Affiliation(s)
- Dominika Pihíková
- Department of Glycobiotechnology, Institute of Chemistry, Slovak
Academy of Sciences, Dúbravská cesta 9, SK-845 38 Bratislava,
Slovakia
| | - Peter Kasák
- Center for Advanced Materials, Qatar University, P.O.Box 2713 Doha,
Qatar
| | - Jan Tkac
- Department of Glycobiotechnology, Institute of Chemistry, Slovak
Academy of Sciences, Dúbravská cesta 9, SK-845 38 Bratislava,
Slovakia
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32
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Monošík R, Stred'anský M, Šturdík E. Application of electrochemical biosensors in clinical diagnosis. J Clin Lab Anal 2014; 26:22-34. [PMID: 24833531 DOI: 10.1002/jcla.20500] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 09/08/2011] [Indexed: 11/08/2022] Open
Abstract
Analyses in the clinical area need quick and reliable analytical methods and devices. For this purpose, biosensors can be a suitable option, whereas they are constructed to be simple for use, specific for the target analyte, capable of continuous monitoring and giving quick results, potentially low-costing and portable. In this article, we describe electrochemical biosensors developed for clinical diagnosis, namely for glucose, lactate, cholesterol, urea, creatinine, DNA, antigens, antibodies, and cancer markers assays. Chosen biosensors showed desirable sensitivity, selectivity, and potential for application on real samples. They are often designed to avoid interference with undesired components present in the monitored systems.
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Affiliation(s)
- Rastislav Monošík
- Institute of Biochemistry, Nutrition and Health Protection, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, Slovak Republic. ,
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33
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Lee S, Kang SH. Fluorescent-free detection on nanobiochips based on wavelength-dependent single plasmonic nanoparticles by differential interference contrast microscopy. Biosens Bioelectron 2014; 60:45-51. [DOI: 10.1016/j.bios.2014.03.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 02/28/2014] [Accepted: 03/23/2014] [Indexed: 10/25/2022]
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34
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Two-layer reflectometric interference spectroscopy-based immunosensing for C-reactive protein. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1334-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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35
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Poghossian A, Schöning MJ. Label-Free Sensing of Biomolecules with Field-Effect Devices for Clinical Applications. ELECTROANAL 2014. [DOI: 10.1002/elan.201400073] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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36
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Taleat Z, Khoshroo A, Mazloum-Ardakani M. Screen-printed electrodes for biosensing: a review (2008–2013). Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1181-1] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Wienken U, Gaub HE. Stamping vital cells - a force-based ligand receptor assay. Biophys J 2013; 105:2687-94. [PMID: 24359740 PMCID: PMC3882508 DOI: 10.1016/j.bpj.2013.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 10/16/2013] [Accepted: 10/16/2013] [Indexed: 01/16/2023] Open
Abstract
Gaining information about receptor profiles on cells, and subsequently finding the most efficient ligands for these signaling receptors, remain challenging tasks in stem cell and cancer research as well as drug development. We introduce a live-cell method with great potential in both screening for surface receptors and analysing binding forces of different ligands. The technique is based on the molecular force assay, a parallel-format, high-throughput experiment on a single-molecule level. On human red blood cells, we demonstrate the detection of the interaction of N-acetyl-α-D-galactosaminyl residues with the lectin helix pomatia agglutinine and of the CD47 receptor with its antibody. The measurements are performed under nearly physiological conditions and still provide a highly specific binding signal. Moreover, with a detailed comparative force analysis on two cell types with different morphology, we show that our method even allows the determination of a DNA force equivalent for the interaction of the CD47 receptor and its antibody.
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Affiliation(s)
- Uta Wienken
- Chair of Experimental Physics & Center for NanoScience, Ludwig-Maximilians-University München, Munich, Germany
| | - Hermann E Gaub
- Chair of Experimental Physics & Center for NanoScience, Ludwig-Maximilians-University München, Munich, Germany.
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Stainless steel modified with an aminosilane layer and gold nanoparticles as a novel disposable substrate for impedimetric immunosensors. Biosens Bioelectron 2013; 48:61-6. [DOI: 10.1016/j.bios.2013.03.061] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 03/17/2013] [Accepted: 03/18/2013] [Indexed: 01/23/2023]
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39
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Florea A, Taleat Z, Cristea C, Mazloum-Ardakani M, Săndulescu R. Label free MUC1 aptasensors based on electrodeposition of gold nanoparticles on screen printed electrodes. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2013.05.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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40
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Chemiluminescence microfluidic system of gold nanoparticles enhanced luminol-silver nitrate for the determination of vitamin B12. Biomed Microdevices 2013; 15:195-202. [PMID: 23053451 DOI: 10.1007/s10544-012-9716-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A rapid and sensitive chemiluminescence (CL) system coupled with a microfluidic chip has been presented to determine vitamin B12 (VB12) based on the reaction of luminol and silver nitrate (AgNO(3)) in the presence of gold nanoparticles (AuNPs). A microfluidic chip was fabricated by a soft-lithographic procedure using polydimethyl siloxane (PDMS) having four inlets and one outlet with a 200 μm wide, 250 μm deep, and 100 mm long microchannel. Ag(+) was used as a chemiluminogenic oxidant in this CL reaction which oxidized luminol to produce strong CL signal in the presence of AuNPs. Luminol reacted with AgNO(3) under the catalysis of AuNPs to produce luminol radicals which reacted with dissolved oxygen and emitted CL light. The proposed CL system was applied to determine the amount of VB12 in VB12 tablets and multivitamin. Under the optimum conditions, the CL intensity of the system was increased with the concentration of VB12 in the range of 0.25-100 ng mL(-1) with the correlation coefficient of 0.9982. The limit of detection was found to be 0.04 ng mL(-1) with the relative standard deviation of 1.56 % for five replicate determinations of 25 ng mL(-1) of VB12. The CL reaction mechanism was demonstrated by UV-visible spectra and CL emission spectra.
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Li Q, Tang D, Lou F, Yang X, Chen G. Simultaneous Electrochemical Multiplexed Immunoassay of Biomarkers Based on Multifunctionalized Graphene Nanotags. ChemElectroChem 2013. [DOI: 10.1002/celc.201300039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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42
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Suh YS, Kamruzzaman M, Alam AM, Lee SH, Kim YH, Kim GM, Dang TD. Chemiluminescence determination of moxifloxacin in pharmaceutical and biological samples based on its enhancing effect of the luminol-ferricyanide system using a microfluidic chip. LUMINESCENCE 2013; 29:248-53. [DOI: 10.1002/bio.2536] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 04/23/2013] [Accepted: 04/24/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Yeoun Suk Suh
- Department of Chemistry; Kyungpook National University; Daegu 702-701 South Korea
| | - Mohammad Kamruzzaman
- Department of Chemistry; Kyungpook National University; Daegu 702-701 South Korea
| | - Al-Mahmnur Alam
- Department of Chemistry; Kyungpook National University; Daegu 702-701 South Korea
| | - Sang Hak Lee
- Department of Chemistry; Kyungpook National University; Daegu 702-701 South Korea
| | - Young Ho Kim
- Research Institute of Advanced Energy Technology; Kyungpook National University; Daegu 702-701 South Korea
| | - Gyu-Man Kim
- School of Mechanical Engineering; Kyungpook National University; Daegu 702-701 South Korea
| | - Trung Dung Dang
- School of Mechanical Engineering; Yeungnam University; Gyeongbuk 712-749 South Korea
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43
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Simple immobilization of antibody in organic/inorganic hybrid thin films for immunosensing. Biosens Bioelectron 2013; 43:45-9. [DOI: 10.1016/j.bios.2012.11.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2012] [Revised: 11/14/2012] [Accepted: 11/15/2012] [Indexed: 11/20/2022]
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44
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Sun X, Ma Z. Electrochemical immunosensor based on nanoporpus gold loading thionine for carcinoembryonic antigen. Anal Chim Acta 2013; 780:95-100. [PMID: 23680556 DOI: 10.1016/j.aca.2013.04.023] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 02/28/2013] [Accepted: 04/08/2013] [Indexed: 12/20/2022]
Abstract
Nanoporous gold (NPG) has recently received considerable attention in analytical electrochemistry because of its good conductivity and large specific surface area. A facile layer-by-layer assembly technique fabricated NPG was used to construct an electrochemical immunosensor for carcinoembryonic antigen (CEA). NPG was fabricated on glassy carbon (GC) electrode by alternatively assembling gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs) using 1,4-benzenedimethanethiol as a cross-linker, and then AgNPs were dissolved with HNO3. The thionine was absorbed into the NPG and then gold nanostructure was electrodeposited on the surface through the electrochemical reduction of gold chloride tetrahydrate (HAuCl4). The anti-CEA was directly adsorbed on gold nanostructure fixed on the GC electrode. The linear range of the immunosensor was from 10 pg mL(-1) to 100 ng mL(-1) with a detection limit of 3 pg mL(-1) (S/N=3). The proposed immunosensor has high sensitivity, wide linear range, low detection limit, and good selectivity. The present method could be widely applied to construct other immunosensors.
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Affiliation(s)
- Xiaobin Sun
- Department of Chemistry, Capital Normal University, Beijing 100048, China
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Ding X, Li H, Xie H, Huang Y, Hou Y, Yin Y, Li G. A novel method to assay molecular chaperone activity of HSP70: evaluation of drug resistance in cancer treatment. Biosens Bioelectron 2013; 47:75-9. [PMID: 23562728 DOI: 10.1016/j.bios.2013.02.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 02/19/2013] [Accepted: 02/27/2013] [Indexed: 12/18/2022]
Abstract
In this work, we have proposed a novel method to specifically assay the molecular chaperone activity of HSP70 based on the HSP70-substrate peptide interaction. By selectively labeling the substrate peptide of HSP70 via host-guest interaction with two different cucurbituril species, the HSP70-substrate peptide interaction can be transduced into detectable signal readout. By using the signal readout, assay of the molecular chaperone activity of HSP70 can be achieved. Moreover, by using our method, chaperone activity of HSP70 can serve as a reliable indicator of drug resistance in cancer treatment. The experimental results reveal that enhanced chaperone activity of HSP70 is observed in both drug-resistant cancer cell line and the serum of cancer victim subject to anti-cancer therapy. Therefore, the proposed method to assay the molecular chaperone activity of HSP70 can be a tool of efficiency in evaluating therapeutic response in HSP70-targeted cancer treatment.
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Affiliation(s)
- Xiaorong Ding
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, PR China
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Electrochemical Sandwich Immunoassay for the Ultrasensitive Detection of Human MUC1 Cancer Biomarker. INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY 2013. [DOI: 10.1155/2013/740265] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A new electrochemical sandwich immunoassay for the ultrasensitive detection of human MUC1 cancer biomarker using protein G-functionalized magnetic beads (MBs) and graphite-based screen-printed electrodes (SPEs) was developed. Magnetic beads were employed as the platforms for the immobilization and immunoreaction process. A pair of primary and secondary antibodies was used to capture the MUC1 protein. After labeling with a third antibody conjugated with horseradish peroxidase (HRP), the resulting conjugate was trapped at the surface of the graphite-based SPEs and MUC1 determination was carried out by differential pulse voltammetry (DPV) at 0.4 V upon H2O2addition using acetaminophen (APAP) as the redox mediator. A linear relationship was obtained for the detection of human MUC1 over a range of 0–25 ppb with the lowest detection limit of 1.34 ppb when HRP was applied as a label. Preliminary experiments were performed using disposable electrochemical sensors in order to optimize some parameters (i.e., incubation times, concentrations, and blocking agent).
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47
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Wei Z, Wang J, Zhang X. Monitoring of quality and storage time of unsealed pasteurized milk by voltammetric electronic tongue. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.10.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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48
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Ma X, Zhang QY. Protein Microarrays for Quantitative Detection of PAI-1 in Serum. Chin J Cancer Res 2012; 24:220-5. [PMID: 23358703 PMCID: PMC3555280 DOI: 10.1007/s11670-012-0220-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Accepted: 01/18/2012] [Indexed: 10/28/2022] Open
Abstract
OBJECTIVE Plasminogen activator inhibitor-1 (PAI-1), one crucial component of the plasminogen activator system, is a major player in the pathogenesis of many vascular diseases as well as in cancer. High levels of PAI-1 in breast cancer tissue are associated with poor prognosis. The aim of this study is to evaluate rigorously the potential of serum PAI-1 concentration functioning as a general screening test in diagnostic or prognostic assays. METHODS A protein-microarray-based sandwich fluorescence immunoassay (FIA) was developed to detect PAI-1 in serum. Several conditions of this microarray-based FIA were optimized to establish an efficacious method. Serum specimens of 84 healthy women and 285 women with breast cancer were analyzed using the optimized FIA microarray. RESULTS The median serum PAI-1 level of breast cancer patients was higher than that of healthy women (109.7 ng/ml vs. 63.4 ng/ml). Analysis of covariance revealed that PAI-1 levels of the two groups were significantly different (P<0.001) when controlling for an age effect on PAI-1 levels. However, PAI-1 values in TNM stage I-IV patients respectively were not significantly different from each other. CONCLUSION This microarray-based sandwich FIA holds potential for quantitative analysis of tumor markers such as PAI-1.
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Affiliation(s)
- Xu Ma
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Clinical Laboratory, Peking University Cancer Hospital & Institute, Beijing 100142, China
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Some S, Ho SM, Dua P, Hwang E, Shin YH, Yoo H, Kang JS, Lee DK, Lee H. Dual functions of highly potent graphene derivative-poly-L-lysine composites to inhibit bacteria and support human cells. ACS NANO 2012; 6:7151-61. [PMID: 22845739 DOI: 10.1021/nn302215y] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Dual-function poly(L-lysine) (PLL) composites that function as antibacterial agents and promote the growth of human cell culture have been sought by researchers for a long period. In this paper, we report the preparation of new graphene derivative-PLL composites via electrostatic interactions and covalent bonding between graphene derivatives and PLL. The resulting composites were characterized by infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. The novel dual function of PLL composites, specifically antibacterial activity and biocompatibility with human cells [human adipose-derived stem cells and non-small-cell lung carcinoma cells (A549)], was carefully investigated. Graphene-DS-PLL composites composed of 4-carboxylic acid benzene diazonium salt (DS) generated more anionic carboxylic acid groups to bind to cationic PLLs, forming the most potent antibacterial agent among PLL and PLL composites with high biocompatibility with human cell culture. This dual functionality can be used to inhibit bacterial growth while enhancing human cell growth.
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Affiliation(s)
- Surajit Some
- National Creative Research Initiative, Center for Smart Molecular Memory, Department of Chemistry, Sungkyunkwan University, 300 Cheoncheon-Dong, Jangan-Gu, Suwon, Gyeonggi-Do 440-746, Republic of Korea
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50
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Nanogold–polyaniline–nanogold microspheres-functionalized molecular tags for sensitive electrochemical immunoassay of thyroid-stimulating hormone. Anal Chim Acta 2012; 738:76-84. [DOI: 10.1016/j.aca.2012.06.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 06/06/2012] [Accepted: 06/08/2012] [Indexed: 02/04/2023]
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