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Seyfikar S, Asgharnejad-laskoukalayeha M, Hassan Jafari S, Goodarzi V, Hadi Salehi M, Zamanlui S. Introducing a New Approach to Preparing Bionanocomposite Sponges Based on Poly (glycerol sebacate urethane) (PGSU) with Great Interconnectivity and High Hydrophilicity Properties for Application in Tissue Engineering. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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2
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Dubrovin EV, Klinov DV. Atomic Force Microscopy of Biopolymers on Graphite Surfaces. POLYMER SCIENCE SERIES A 2021. [DOI: 10.1134/s0965545x2106002x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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3
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Dehghankar M, Mohammadi T, Tavakolmoghadam M, Tofighy MA. Polyvinylidene Fluoride/Nanoclays (Cloisite 30B and Palygorskite) Mixed Matrix Membranes with Improved Performance and Antifouling Properties. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01656] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Mona Dehghankar
- Research and Technology Center of Membrane Processes, Department of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Narmak, 16846 Tehran, Iran
- Center of Excellence for Membrane Science and Technology, Iran University of Science and Technology (IUST), Narmak, Tehran 16846, Iran
| | - Toraj Mohammadi
- Research and Technology Center of Membrane Processes, Department of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Narmak, 16846 Tehran, Iran
- Center of Excellence for Membrane Science and Technology, Iran University of Science and Technology (IUST), Narmak, Tehran 16846, Iran
| | - Maryam Tavakolmoghadam
- Polymer, Chemical and Petrochemical Science and Technology Division, Research Institute of Petroleum Industry, Tehran 1485733111, Iran
| | - Maryam Ahmadzadeh Tofighy
- Research and Technology Center of Membrane Processes, Department of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Narmak, 16846 Tehran, Iran
- Center of Excellence for Membrane Science and Technology, Iran University of Science and Technology (IUST), Narmak, Tehran 16846, Iran
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Heterostructured Au/MoS2-MWCNT nanoflowers: A highly efficient support for the electrochemical aptasensing of solvated mercuric ion. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105154] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Konari M, Heydari-Bafrooei E, Dinari M. Efficient immobilization of aptamers on the layered double hydroxide nanohybrids for the electrochemical proteins detection. Int J Biol Macromol 2020; 166:54-60. [PMID: 33075340 DOI: 10.1016/j.ijbiomac.2020.10.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 08/31/2020] [Accepted: 10/09/2020] [Indexed: 12/31/2022]
Abstract
Despite the use of layered double hydroxides (LDH) in different electrochemical (bio)sensors, the construction of aptasensors using LDH-based surfaces was not reported to the best of our knowledge. This may be due to the lack of a suitable linker to attach aptamers to the LDH-modified surface. LDH-based aptasensors are established here as very sensitive and reliable devices in serum and cerebrospinal fluid (CSF) analysis. 5'-NH2 DNA aptamer probes were immobilized on the LDH-based surfaces in a vertical conformation without any linker materials. Due to the low electron conductivity of the LDH, carbon nanotubes (CNT) with high electronic conductivity and high surface area were combined with LDH. Thrombin was used as a model protein for aptasensing. The sensor shows a linear range of 0.005-12,000 pmol L-1 and a limit of detection of 0.1 fmol L-1. Moreover, the aptasensor was used for the sensing of thrombin in CSF and serum samples acquired from both healthy and patients with different disease.
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Affiliation(s)
- Maryam Konari
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, 77188-97111, Iran
| | - Esmaeil Heydari-Bafrooei
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, 77188-97111, Iran.
| | - Mohammad Dinari
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
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Mohammadi A, Heydari-Bafrooei E, Foroughi MM, Mohammadi M. Electrochemical aptasensor for ultrasensitive detection of PCB77 using thionine-functionalized MoS2-rGO nanohybrid. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104747] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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7
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Gao J, Zhang H, Wang Z. A DNA tetrahedron nanoprobe-based fluorescence resonance energy transfer sensing platform for intracellular tumor-related miRNA detection. Analyst 2020; 145:3535-3542. [PMID: 32314984 DOI: 10.1039/c9an02610j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accurate and sensitive detection of disease-related microRNAs (miRNAs) is of great significance for early disease diagnosis. In this work, a DNA tetrahedron nanoprobe (DTNP)-based fluorescence resonance energy transfer (FRET) sensing platform (termed DTNP sensor) was constructed for sensitive detection of tumor-related miRNA (e.g., hsa-miR-146b-5p) with DNA assisted cyclic amplification. DTNP was synthesized by DNA self-assembly. In the absence of hsa-miR-146b-5p, the fluorescence DNA (HP) modified with FAM at the 5' terminal and TAMRA at the 3' terminal cannot form the hairpin structure because of the hybridization with the extended DNA strand of the DNA tetrahedron, resulting in a low FRET effect. In the presence of hsa-miR-146b-5p, it would complementarily hybridize with the extended DNA strand of the DNA tetrahedron, leading to the release of HP and occurrence of strong FRET. Thus, the concentration of hsa-miR-146b-5p can be revealed by the change in the fluorescence intensity. Moreover, an assistant DNA was employed to replace hsa-miR-146b-5p for cyclic signal amplification, which can further enhance the detection sensitivity. Under the optimal experimental conditions, the limit of detection for hsa-miR-146b-5p was as low as 6 pM (S/N = 3). Furthermore, the DTNP sensor was successfully applied to evaluate the hsa-miR-146b-5p expression levels in different cell lines. The inhibition of hsa-miR-146b-5p expression in different cells was also investigated and a satisfactory result was obtained.
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Affiliation(s)
- Jiaxue Gao
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.
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Wang J, Zhang L, Lu L, Kang T. Molecular beacon immobilized on graphene oxide for enzyme-free signal amplification in electrochemiluminescent determination of microRNA. Mikrochim Acta 2019; 186:142. [PMID: 30707306 DOI: 10.1007/s00604-019-3252-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 01/13/2019] [Indexed: 01/01/2023]
Abstract
An electrochemiluminescence (ECL) based biosensor is described for determination of microRNAs in the A549 cell line. Firstly, graphene oxide (GO) is dripped onto a glassy carbon electrode surface to form an interface to which one end of the capture probe (with a stem-loop structure) can be anchored through π-interaction via dangling unpaired bases. The other end of the capture probe is directed away from the GO surface to make it stand upright. Target microRNAs can open the hairpin structure to form a double-stranded DNA-RNA structure. Two auxiliary probes, generating a hybridization chain reaction, are used to elongate the DNA duplex. Finally, doxorubicin-modified cadmium telluride quantum dot nanoparticles (Dox-CdTe QD) are intercalated into the base pairs of the hybrid duplexes to act as signalling molecules. The ECL signal of the Dox-CdTe QD increases proportionally with the concentration of microRNAs, specifically for microRNA-21. The assay covers a wide linear range (1 fM to 0.1 nM), has a low detection limit for microRNA-21 (1 fM), and is selective, reproducible, and stable. Graphical abstract An enzyme-free amplification electrochemiluminescent assay is described to quantitative detection of microRNA in the A549 cell line. Graphene oxide was used to immobilize capture probes obviating the special modification. Doxorubicin-modified cadmium telluride quantum dot nanoparticles are intercalated into the base pairs of the hybrid duplexes to act as signalling molecules.
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Affiliation(s)
- Jiaxing Wang
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China
| | - Linlin Zhang
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China
| | - Liping Lu
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China.
| | - Tianfang Kang
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China
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Heydari-Bafrooei E, Amini M, Saeednia S. Electrochemical detection of DNA damage induced by Bleomycin in the presence of metal ions. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.09.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Heydari-Bafrooei E, Askari S. Ultrasensitive aptasensing of lysozyme by exploiting the synergistic effect of gold nanoparticle-modified reduced graphene oxide and MWCNTs in a chitosan matrix. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2356-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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11
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Individual and simultaneous voltammetric determination of ascorbic acid, uric acid and folic acid by using a glassy carbon electrode modified with gold nanoparticles linked to bentonite via cysteine groups. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2186-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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12
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Heydari-Bafrooei E, Shamszadeh NS. Electrochemical bioassay development for ultrasensitive aptasensing of prostate specific antigen. Biosens Bioelectron 2016; 91:284-292. [PMID: 28033557 DOI: 10.1016/j.bios.2016.12.048] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 12/19/2016] [Accepted: 12/20/2016] [Indexed: 01/22/2023]
Abstract
A densely packed gold nanoparticles on the rGO-MWCNT platform was used as the basis for an ultrasensitive label-free electrochemical aptasensor to detect the biomarker prostate specific antigen (PSA) in serum. The detection was based on that the variation of electron transfer resistance (Rct) and differential pulse voltammetry (DPV) current were relevant to the formation of PSA-aptamer complex at the modified electrode surface. Compared with pure AuNPs, rGO-MWCNT and MWCNT/AuNPs, the rGO-MWCNT/AuNPs nanocomposite modified electrode was the most sensitive aptasensing platform for the determination of PSA. Two calibration curves were prepared from the data obtained from the DPV and electrochemical impedance spectroscopy (EIS) by plotting the peak current and Rct against PSA concentration, respectively. The proposed aptasensor had an extremely low LOD of 1.0pgmL-1 PSA within the detection range of 0.005-20ngmL-1 and 0.005-100ngmL-1 for DPV and EIS calibration curves, respectively. This sensor exhibited outstanding anti-interference ability towards co-existing molecules with good stability, sensitivity, and reproducibility. Clinical application was performed with analysis of the PSA levels in serum samples obtained from patients with prostate cancer using both the aptasensor and Immunoradiometric assay. The results revealed the proposed system to be a promising candidate for clinical analysis of PSA.
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Affiliation(s)
- Esmaeil Heydari-Bafrooei
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, 77188-97111, Iran; High Temperature Fuel Cell Research Group, Vali-e-Asr University of Rafsanjan, 77188-97111, Iran.
| | - Nazgol Sadat Shamszadeh
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, 77188-97111, Iran
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Heydari-Bafrooei E, Amini M, Ardakani MH. An electrochemical aptasensor based on TiO2/MWCNT and a novel synthesized Schiff base nanocomposite for the ultrasensitive detection of thrombin. Biosens Bioelectron 2016; 85:828-836. [PMID: 27295570 DOI: 10.1016/j.bios.2016.06.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/04/2016] [Accepted: 06/06/2016] [Indexed: 12/31/2022]
Abstract
A sensitive aptasensor based on a robust nanocomposite of titanium dioxide nanoparticles, multiwalled carbon nanotubes (MWCNT), chitosan and a novel synthesized Schiff base (SB) (TiO2/MWCNT/CHIT/SB) on the surface of a glassy carbon electrode (GCE) was developed for thrombin detection. The resultant nanocomposite can provide a large surface area, excellent electrocatalytic activity, and high stability, which would improve immobilization sites for biological molecules, allow remarkable amplification of the electrochemical signal and contribute to improved sensitivity. Thrombin aptamers were simply immobilized onto the TiO2-MWCNT/CHIT-SB nanocomposite matrix through simple π - π stacking and electrostatic interactions between CHIT/SB and aptamer strands. The electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to analyze the surface characterization of unmodified GCE and TiO2-MWCNT/CHIT-SB modified GCE, and also the interaction between aptamer and thrombin. In the presence of thrombin, the aptamer on the adsorbent layer captures the target on the electrode interface, which makes a barrier for electrons and inhibits electron transfer, thereby resulting in decreased DPV and increased impedance signals of the TiO2-MWCNT/CHIT-SB modified GCE. Furthermore, the proposed aptasensor has a very low LOD of 1.0fmolL(-1) thrombin within the detection range of 0.00005-10nmolL(-1). The aptasensor also presents high specificity and reproducibility for thrombin, which is unaffected by the coexistence of other proteins. Clinical application was performed with analysis of the thrombin levels in blood and CSF samples obtained from patients with MS, Parkinson, Epilepsy and Polyneuropathy using both the aptasensor and commercial ELISA kit. The results revealed the proposed system to be a promising candidate for clinical analysis of thrombin.
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Affiliation(s)
- Esmaeil Heydari-Bafrooei
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, 77188-97111, Iran.
| | - Maryam Amini
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, 77188-97111, Iran
| | - Mehdi Hatefi Ardakani
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, 77188-97111, Iran
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14
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Electrochemical investigation of gold nanoparticles incorporated zinc based metal-organic framework for selective recognition of nitrite and nitrobenzene. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.03.092] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Dubrovin EV, Schächtele M, Schäffer TE. Nanotemplate-directed DNA segmental thermal motion. RSC Adv 2016. [DOI: 10.1039/c6ra14383k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Nanotemplate directed DNA segmental thermal motion on molecular nanotemplates on graphite was directly observed and characterized using AFM in a liquid.
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Affiliation(s)
- E. V. Dubrovin
- Lomonosov Moscow State University
- Faculty of Physics
- 119991 Moscow
- Russian Federation
- University of Tübingen
| | - M. Schächtele
- University of Tübingen
- Institute of Applied Physics
- 72076 Tübingen
- Germany
| | - T. E. Schäffer
- University of Tübingen
- Institute of Applied Physics
- 72076 Tübingen
- Germany
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Dubrovin EV, Speller S, Yaminsky IV. Statistical analysis of molecular nanotemplate driven DNA adsorption on graphite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15423-15432. [PMID: 25470069 DOI: 10.1021/la5041773] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, we have studied the conformation of DNA molecules aligned on the nanotemplates of octadecylamine, stearyl alcohol, and stearic acid on highly oriented pyrolytic graphite (HOPG). For this purpose, fluctuations of contours of adsorbed biopolymers obtained from atomic force microscopy (AFM) images were analyzed using the wormlike chain model. Moreover, the conformations of adsorbed biopolymer molecules were characterized by the analysis of the scaling exponent ν, which relates the mean squared end-to-end distance and contour length of the polymer. During adsorption on octadecylamine and stearyl alcohol nanotemplates, DNA forms straight segments, which order along crystallographic axes of graphite. In this case, the conformation of DNA molecules can be described using two different length scales. On a large length scale (at contour lengths l > 200-400 nm), aligned DNA molecules have either 2D compact globule or partially relaxed 2D conformation, whereas on a short length scale (at l ≤ 200-400 nm) their conformation is close to that of rigid rods. The latter type of conformation can be also assigned to DNA adsorbed on a stearic acid nanotemplate. The different conformation of DNA molecules observed on the studied monolayers is connected with the different DNA-nanotemplate interactions associated with the nature of the functional group of the alkane derivative in the nanotemplate (amine, alcohol, or acid). The persistence length of λ-DNA adsorbed on octadecylamine nanotemplates is 31 ± 2 nm indicating the loss of DNA rigidity in comparison with its native state. Similar values of the persistence length (34 ± 2 nm) obtained for 24-times shorter DNA molecules adsorbed on an octadecylamine nanotemplate demonstrate that this rigidity change does not depend on biopolymer length. Possible reasons for the reduction of DNA persistence length are discussed in view of the internal DNA structure and DNA-surface interaction.
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Affiliation(s)
- E V Dubrovin
- Chair of Physics of Polymers and Crystals, Faculty of Physics, M. V. Lomonosov Moscow State University , Leninskie gory, 1/2, Moscow 119991, Russia
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