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Cui J, Wang X, Chen S. Ho2O3-TiO2 Nanobelts Electrode for Highly Selective and Sensitive Detection of Cancer miRNAs. BIOSENSORS 2022; 12:bios12100800. [PMID: 36290936 PMCID: PMC9599087 DOI: 10.3390/bios12100800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/30/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022]
Abstract
The design and engineering of effective electrode materials is critical in the development of electrochemical sensors. In the present study, Ho2O3-TiO2 nanobelts were synthesized by an alkaline hydrothermal process. The structure and morphology were investigated by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) measurements. The Ho2O3-TiO2 nanobelts showed a distinctly enhanced (004) reflection peak and rough surfaces and were used for the electrochemical selective sensing of various cancer miRNAs, such as prostate cancer miR-141, osteosarcoma miR-21, and pancreatic cancer miR-1290. Voltammetric measurements showed an oxidation peak at +0.4, +0.2, and +1.53 V for the three different cancer biomarkers, respectively, with the detection limit as low as 4.26 aM. The results suggest that the Ho2O3-TiO2 nanobelts can be used as active materials to detect early cancers, for in vitro screening of anticancer drugs, and molecular biology research.
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Affiliation(s)
- Jingjie Cui
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China
- Correspondence: ; Tel.: +86-57186878667
| | - Xuping Wang
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Shaowei Chen
- Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
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Sharma S, Sidhartha PN, Chappanda KN. Influence of laser and alkali treatment on an Ag/TiO 2nanotube based dopamine sensor. NANOTECHNOLOGY 2021; 33:015502. [PMID: 34587590 DOI: 10.1088/1361-6528/ac2b6f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
Herein, TiO2nanotubes (T-NTs) arrays were subjected to two types of treatment followed by a simple metal deposition technique to significantly enhance the performances of T-NTs based electrochemical sensing of dopamine. The first type of treatment was done by soaking T-NTs in sodium hydroxide solution for an optimal time to enhance the conductivity and charge carrier density. The second type of treatment employed was laser irradiation, which induces crystallinity disorder and forms rutile TiO2, promoting active analyte adsorption sites. Afterward, silver (Ag) was electro-deposited on the T-NTs as a dopamine sensing catalyst to form T-NTs/Ag nanohybrids. The dual-treated T-NTs based sensor showed 3-fold enhancement in sensitivity (from 8.2μA mM-1cm-2to 32μA mM-1cm-2), reduced charge transfer resistance (from 38 × 10-6Ω to 0.7 × 10-6Ω), above 2 order higher donor charge density (from 3.58 × 1018cm-3to 1.41 × 1021cm-3), and reduced limit of detection (from 32.3μM to 2.8μM) in comparison to plain T-NTs based sensor. In addition, the sensitivity reported here is significantly higher than most of the previously reported TiO2based dopamine sensors. Perspective-wise, the dual treatment approach is a promising technique and is highly desirable for enhancing the performances of T-NTs and other nanomaterial based electrochemical sensors.
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Affiliation(s)
- Sarda Sharma
- Department of Electrical and Electronics Engineering, Birla Institute of Technology and Sciences (BITS), Pilani, Hyderabad Campus, Hyderabad 500078, Telangana, India
| | - P N Sidhartha
- Department of Electrical and Electronics Engineering, Birla Institute of Technology and Sciences (BITS), Pilani, Hyderabad Campus, Hyderabad 500078, Telangana, India
| | - Karumbaiah N Chappanda
- Department of Electrical and Electronics Engineering, Birla Institute of Technology and Sciences (BITS), Pilani, Hyderabad Campus, Hyderabad 500078, Telangana, India
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Zhou N, Liu T, Wen B, Gong C, Wei G, Su Z. Recent Advances in the Construction of Flexible Sensors for Biomedical Applications. Biotechnol J 2020; 15:e2000094. [PMID: 32744777 DOI: 10.1002/biot.202000094] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/08/2020] [Indexed: 11/09/2022]
Abstract
The fabrication of flexible sensors is a potential way to promote the progress of modern social science and technology due to their wide applications in high-performance electronic equipment and devices. Flexible sensors based on organic materials combine the unique advantages of flexibility and low cost, increasing interest in healthcare monitoring, treatment, and human-machine interfaces. Advances in materials science and biotechnology have rapidly accelerated the development of bio-integrated multifunctional sensors and devices. Due to their excellent mechanical and electrical properties, many types of functional materials provided benefits for the construction of various sensors with improved flexibility and stretchability. In this review, recent advance in the fabrication of flexible sensors by using functional nanomaterials including nanoparticles, carbon materials, metal-organic materials, and polymers is presented. In addition, the potential biomedical applications of the fabricated flexible sensors for detecting gas molecules signals, small molecules, DNA/RNA, proteins, others are introduced and discussed.
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Affiliation(s)
- Nan Zhou
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Tianjiao Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Bianying Wen
- School of Materials and Mechanical Engineering, Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University, Beijing, 100048, China
| | - Coucong Gong
- Faculty of Production Engineering, University of Bremen, Bremen, D-28359, Germany
| | - Gang Wei
- Faculty of Production Engineering, University of Bremen, Bremen, D-28359, Germany.,College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, China
| | - Zhiqiang Su
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
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Li Z, He J, Li B, Zhang J, He K, Duan X, Huang R, Wu Z, Xiang G. Titanium dioxide nanoparticles induce endoplasmic reticulum stress-mediated apoptotic cell death in liver cancer cells. J Int Med Res 2020; 48:300060520903652. [PMID: 32281441 PMCID: PMC7155242 DOI: 10.1177/0300060520903652] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Objective Titanium oxide (TiO2) acts as a photosensitizer in photodynamic therapy by mediating reactive oxygen species (ROS)-induced endoplasmic reticulum (ER) stress. This study aimed to investigate the effect of TiO2 on ER stress in liver cancer cells. Methods Normal human liver and human hepatocarcinoma cell lines were incubated with various concentrations of TiO2 nanotubes for 48 hours. Cell growth, apoptosis, cell cycle, and cellular ROS were detected. Expression levels of ER stress sensors (PERK and ATF6) and Bax were evaluated by western blot. The effect of TiO2 on liver cancer growth was also investigated in mice in vivo. Results TiO2 inhibited cell growth, increased apoptosis and cellular ROS levels, and arrested the cell cycle in G1 stage in liver cancer cells. TiO2 also increased PERK, ATF6, and Bax expression levels in liver cancer cells in dose-dependent manners. TiO2 had no significant effect on cell growth, apoptosis, ROS level, cell cycle distribution, or PERK, ATF6, or Bax expression in normal liver cells. TiO2 administration reduced tumor volume and increased PERK, Bax, and ATF6 expression levels in tumor tissues in vivo. Conclusions TiO2 nanoparticles increased ROS-induced ER stress and activated the PERK/ATF6/Bax axis in liver cancer cells in vitro and in vivo.
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Affiliation(s)
- Zhiwang Li
- Department of General Surgery, Guangdong Second Provincial General Hospital, Guangzhou, China.,The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Department of Gastrointestinal Surgery, Meizhou People's Hospital, Meizhou, China
| | - Jingliang He
- Shunde Hospital of Guangzhou University of Traditional Chinese Medicine, Foshan, China
| | - Bowei Li
- Department of General Surgery, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Jinqian Zhang
- Department of Laboratory Medicine, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Ke He
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Xiaopeng Duan
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Rui Huang
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Zuguang Wu
- Department of Gastrointestinal Surgery, Meizhou People's Hospital, Meizhou, China
| | - Guoan Xiang
- Department of General Surgery, Guangdong Second Provincial General Hospital, Guangzhou, China.,The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
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Jaiswal J, Dhayal M. Electroanalytical Method for Quantification of Hepatocellular Carcinoma Cells as Charge Transport Barriers in Culture Media. ELECTROANAL 2020. [DOI: 10.1002/elan.201900553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Juhi Jaiswal
- Nano-Cellular Medicine and Biophysics Laboratory, School of Biomedical Engineering Indian Institute of Technology (Banaras Hindu University) Varanasi UP-221005 India
| | - Marshal Dhayal
- Nano-Cellular Medicine and Biophysics Laboratory, School of Biomedical Engineering Indian Institute of Technology (Banaras Hindu University) Varanasi UP-221005 India
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Love Wave Sensor for Prostate-Specific Membrane Antigen Detection Based on Hydrophilic Molecularly-Imprinted Polymer. Polymers (Basel) 2018; 10:polym10050563. [PMID: 30966597 PMCID: PMC6415384 DOI: 10.3390/polym10050563] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/19/2018] [Accepted: 05/21/2018] [Indexed: 12/11/2022] Open
Abstract
Prostate-specific membrane antigen (PSMA) is a biomarker for prostate cancer (PCa), and a specific and reliable detection technique of PSMA is urgently required for PCa early diagnosis. A Love wave sensor has been widely studied for real-time sensing and highly sensitive applications, but the sensing unit needs special handling for selective detection purpose. In this study, we prepared a versatile Love wave sensor functionalized with molecularly-imprinted polymers (MIP), PSMA as the template molecule. To enhance the specific template bindings of MIP in pure aqueous solutions, facile reversible addition/fragmentation chain transfer (RAFT) precipitation polymerization (RAFTPP) was used to produce surface hydrophilic polymer brushes on MIP. The presence of hydrophilic polymer brushes on MIP improved its surface hydrophilicity and significantly reduced their hydrophobic interactions with template molecules in pure aqueous media. In detection process, the acoustic delay-line is confederative to a microfluidic chip and inserted in an oscillation loop. The real-time resonance frequency of the MIP-based Love wave sensor to different concentrations of PSMA was investigated. The limit of detection (LOD) for this Love SAW sensor was 0.013 ng mL−1, which demonstrates that this sensor has outstanding performance in terms of the level of detection.
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Xia H, Wu S, Bi J, Zhang S. Controlled preparation of M(Ag, Au)/TiO 2 through sulfydryl-assisted method for enhanced photocatalysis. NANOTECHNOLOGY 2017; 28:465604. [PMID: 29063863 DOI: 10.1088/1361-6528/aa8d94] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Here a simple and effective method was explored to fabricate M/TiO2 (M = Ag, Au) composites, which required neither pre-treatment of TiO2 nor any additives as reducing agent. Using amorphous TiO2 spheres functionalized with SH groups as starting materials, the noble metallic ions (Ag, Au) can be adsorbed by TiO2 due to their special affinity with SH groups, which is beneficial to the uniform dispersion of metallic ions on the surface of TiO2. Then the adsorbed ions were reduced to form noble metal nanoparticles by heating process (95 °C) directly without additive as reduction agent. Meanwhile, the amorphous TiO2 was transformed into anatase phase during the heating process. Thus, the transformation of TiO2 along with the reduction of noble metallic ions (Ag, Au) was simultaneously carried out by heating. The XRD patterns proved the formation of anatase TiO2 after heating. The characterizations of XPS and TEM proved the formation of Ag and Au nanoparticles on the surface of TiO2. The element mapping indicated that Ag nanoparticles are dispersed uniformly on the surface of TiO2. The photocatalytic activity of the composites has been investigated by the degradation of methyl orange under visible light irradiation. The results showed that when Ag/TiO2 (2.8 wt%) was used as photocatalyst, about 98% of the MO molecules were degraded in 70 min.
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Affiliation(s)
- Hongbo Xia
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, People's Republic of China
| | - Suli Wu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, People's Republic of China
| | - Jiajie Bi
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, People's Republic of China
| | - Shufen Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, People's Republic of China
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Seenivasan R, Singh CK, Warrick JW, Ahmad N, Gunasekaran S. Microfluidic-integrated patterned ITO immunosensor for rapid detection of prostate-specific membrane antigen biomarker in prostate cancer. Biosens Bioelectron 2017; 95:160-167. [DOI: 10.1016/j.bios.2017.04.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 03/30/2017] [Accepted: 04/10/2017] [Indexed: 11/15/2022]
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In situ synthesis and visible-light photocatalytic application of CdTeSe@TiO2 nanotube composites with high electron transfer rate. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.10.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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