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Amaral SI, Silva FALS, Costa-Almeida R, Timochenco L, Fernandes JR, Sarmento B, Gonçalves IC, Magalhães FD, Pinto AM. Pharmaceutical Formulations Containing Graphene and 5-Fluorouracil for Light-Emitting Diode-Based Photochemotherapy of Skin Cancer. ACS APPLIED MATERIALS & INTERFACES 2024; 16:4333-4347. [PMID: 38240200 DOI: 10.1021/acsami.3c13409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Nonmelanoma skin cancer (NMSC) is the most common cancer worldwide, among which 80% is basal cell carcinoma (BCC). Current therapies' low efficacy, side effects, and high recurrence highlight the need for alternative treatments. In this work, a partially reduced nanographene oxide (p-rGOn) developed in our laboratory was used. It has been achieved through a controlled reduction of nanographene oxide via UV-C irradiation that yields small nanometric particles (below 200 nm) that preserve the original water stability while acquiring high light-to-heat conversion efficiency. The latter is explained by a loss of carbon-oxygen single bonds (C-O) and the re-establishment of sp2 carbon bonds. p-rGOn was incorporated into a Carbopol hydrogel together with the anticancer drug 5-fluorouracil (5-FU) to evaluate a possible combined PTT and chemotherapeutic effect. Carbopol/p-rGOn/5-FU hydrogels were considered noncytotoxic toward normal skin cells (HFF-1). However, when A-431 skin cancer cells were exposed to NIR irradiation for 30 min in the presence of Carbopol/p-rGOn/5-FU hydrogels, almost complete eradication was achieved after 72 h, with a 90% reduction in cell number and 80% cell death of the remaining cells after a single treatment. NIR irradiation was performed with a light-emitting diode (LED) system, developed in our laboratory, which allows adjustment of applied light doses to achieve a safe and selective treatment, instead of the standard laser systems that are associated with damages in the healthy tissues in the tumor surroundings. Those are the first graphene-based materials containing pharmaceutical formulations developed for BCC phototherapy.
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Affiliation(s)
- Sara I Amaral
- LEPABE─Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- ALiCE─Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - Filipa A L S Silva
- LEPABE─Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- ALiCE─Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - Raquel Costa-Almeida
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - Licínia Timochenco
- LEPABE─Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- ALiCE─Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - José Ramiro Fernandes
- CQVR─Centro de Química Vila Real, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
- Physical Department, University of Trás-os-Montes and Alto Douro, Quinta dos Prados, 5001-801 Vila Real, Portugal
| | - Bruno Sarmento
- ICBAS-Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
- CESPU, IINFACTS-Institute for Research and Advanced Training in Health Sciences and Technologies, Rua Central de Gandra 1317, 4585-116 Gandra, Portugal
| | - Inês C Gonçalves
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - Fernão D Magalhães
- LEPABE─Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- ALiCE─Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
| | - Artur M Pinto
- LEPABE─Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- ALiCE─Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
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Silva FALS, Timochenco L, Costa-Almeida R, Fernandes JR, Santos SG, Magalhães FD, Pinto AM. UV-C driven reduction of nanographene oxide opens path for new applications in phototherapy. Colloids Surf B Biointerfaces 2024; 233:113594. [PMID: 37979484 DOI: 10.1016/j.colsurfb.2023.113594] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 10/03/2023] [Accepted: 10/11/2023] [Indexed: 11/20/2023]
Abstract
The main challenges associated to the application of graphene-based materials (GBM) in phototherapy are obtaining particles with lateral nanoscale dimensions and water stability that present high near-infrared (NIR) absorption. Nanosized graphene oxide (GOn) is stable in aqueous dispersion, due to the oxygen functionalities on its surface, but possesses low photothermal efficiency in NIR region. GOn total reduction originates reduced nanographene oxide (rGOn) that presents high NIR absorption, but poor water stability. In this work, we produced a partially reduced nanographene oxide (p-rGOn) by GOn photoreduction using ultraviolet radiation (UV-C), yielding nanometric particles that preserve the original water stability, but acquire high light-to-heat conversion efficiency. GOn and p-rGOn presented mean particle sizes of 170 ± 81 nm and 188 ± 99 nm, respectively. 8 h of UV-C irradiation allowed to obtain a p-rGOn stable for up 6 months in water, with a zeta potential of -32.3 ± 1.3 mV. p-rGOn water dispersions have shown to absorb NIR radiation, reaching 52.7 °C (250 µg mL-1) after 30 min NIR irradiation. Chemical characterization of p-rGOn showed a decrease in the number of characteristic oxygen functional groups, confirming GOn partial reduction. Furthermore, p-rGOn (250 µg mL-1) didn't cause any cytotoxicity (ISO10993-5:2009(E)) towards human skin fibroblasts (HFF-1) and human skin keratinocytes (HaCat), after 24 and 48 h incubation. An innovative custom-built NIR LED-system has been developed and validated for p-rGOn photothermal effect evaluation. Finally, exposure to p-rGOn+NIR-LEDs has caused no cytotoxicity towards HFF-1 or HaCat cells, revealing its potential to be used as a safe therapy.
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Affiliation(s)
- Filipa A L S Silva
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal; i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - Licínia Timochenco
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal; i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - Raquel Costa-Almeida
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - José Ramiro Fernandes
- CQVR - Centro de Química Vila Real, Universidade de Trás-os-Montes e Alto Douro, Portugal; Physical Department, University of Trás-os-Montes and Alto Douro, Quinta dos Prados, 5000-801 Vila Real, Portugal
| | - Susana G Santos
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal
| | - Fernão D Magalhães
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal
| | - Artur M Pinto
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-180 Porto, Portugal; i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal; INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-180 Porto, Portugal.
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Zheng Z, Liu P, Zhang X, Jingguo xin, Yongjie wang, Zou X, Mei X, Zhang S, Zhang S. Strategies to improve bioactive and antibacterial properties of polyetheretherketone (PEEK) for use as orthopedic implants. Mater Today Bio 2022; 16:100402. [PMID: 36105676 PMCID: PMC9466655 DOI: 10.1016/j.mtbio.2022.100402] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 12/26/2022] Open
Abstract
Polyetheretherketone (PEEK) has gradually become the mainstream material for preparing orthopedic implants due to its similar elastic modulus to human bone, high strength, excellent wear resistance, radiolucency, and biocompatibility. Since the 1990s, PEEK has increasingly been used in orthopedics. Yet, the widespread application of PEEK is limited by its bio-inertness, hydrophobicity, and susceptibility to microbial infections. Further enhancing the osteogenic properties of PEEK-based implants remains a difficult task. This article reviews some modification methods of PEEK in the last five years, including surface modification of PEEK or incorporating materials into the PEEK matrix. For surface modification, PEEK can be modified by chemical treatment, physical treatment, or surface coating with bioactive substances. For PEEK composite material, adding bioactive filler into PEEK through the melting blending method or 3D printing technology can increase the biological activity of PEEK. In addition, some modification methods such as sulfonation treatment of PEEK or grafting antibacterial substances on PEEK can enhance the antibacterial performance of PEEK. These strategies aim to improve the bioactive and antibacterial properties of the modified PEEK. The researchers believe that these modifications could provide valuable guidance on the future design of PEEK orthopedic implants.
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Electrochemical Determination of Glucose Using Nitrogen-Doped Graphene. Top Catal 2022. [DOI: 10.1007/s11244-022-01658-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Function of Graphene Oxide as the “Nanoquencher” for Hg2+ Detection Using an Exonuclease I-Assisted Biosensor. Int J Mol Sci 2022; 23:ijms23116326. [PMID: 35683005 PMCID: PMC9180964 DOI: 10.3390/ijms23116326] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/02/2022] [Accepted: 06/03/2022] [Indexed: 02/04/2023] Open
Abstract
Graphene oxide is well known for its excellent fluorescence quenching ability. In this study, positively charged graphene oxide (pGO25000) was developed as a fluorescence quencher that is water-soluble and synthesized by grafting polyetherimide onto graphene oxide nanosheets by a carbodiimide reaction. Compared to graphene oxide, the fluorescence quenching ability of pGO25000 is significantly improved by the increase in the affinity between pGO25000 and the DNA strand, which is introduced by the additional electrostatic interaction. The FAM-labeled single-stranded DNA probe can be almost completely quenched at concentrations of pGO25000 as low as 0.1 μg/mL. A simple and novel FAM-labeled single-stranded DNA sensor was designed for Hg2+ detection to take advantage of exonuclease I-triggered single-stranded DNA hydrolysis, and pGO25000 acted as a fluorescence quencher. The FAM-labeled single-stranded DNA probe is present as a hairpin structure by the formation of T–Hg2+–T when Hg2+ is present, and no fluorescence is observed. It is digested by exonuclease I without Hg2+, and fluorescence is recovered. The fluorescence intensity of the proposed biosensor was positively correlated with the Hg2+ concentration in the range of 0–250 nM (R2 = 0.9955), with a seasonable limit of detection (3σ) cal. 3.93 nM. It was successfully applied to real samples of pond water for Hg2+ detection, obtaining a recovery rate from 99.6% to 101.1%.
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Wang H, Liu J, Chen W, Na J, Huang Y, Li G. A fluorescence aptasensor based on GSH@GQDs and RGO for the detection of Glypican-3. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 270:120798. [PMID: 35051745 DOI: 10.1016/j.saa.2021.120798] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 12/07/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Glypican-3 (GPC3), a heparin sulfate proteoglycan, is a potential diagnostic and therapeutic target for hepatocellular carcinoma. In this paper, a novel fluorescent aptasensor for GPC3 detection is constructed via glutathione@graphene quantum dots-labeled GPC3 aptamer (GSH@GQDs-GPC3Apt) as a fluorescence probe. First, GSH@GQDs is screened out with higher fluorescence intensity, which emits bright blue fluorescence under ultraviolet light. Then, the fluorescence-labeled GSH@GQDs-GPC3Apt probe is formed by the combination of amination GPC3Apt and GSH@GQDs using EDC/NHS coupled reaction. Under hydrogen bond and π-π interaction/stacking, the fluorescence of GSH@GQDs-GPC3Apt could be quenched by reductive graphene oxide (RGO) with the help of the photoinduced electron transfer and the fluorescence resonance energy transfer mechanism. In the presence of GPC3, the GSH@GQDs-GPC3Apt specifically recognizes and binds to GPC3, giving rise to the change of secondary structure of GPC3Apt to form the GPC3/GPC3Apt-GSH@GQDs complex, which would lead to the disintegration of the GSH@GQDs-GPC3Apt-RGO compound. Therefore, the energy transfer process is blocked and the fluorescence intensity is restored, enabling a highly sensitive response to GPC3. When the concentration of GPC3 is from 5.0 ng/mL to 150.0 ng/mL, the fluorescence recovery rate is well linearly related to GPC3 concentration with the limit of detection of 2.395 ng/mL (S/N = 3). This strategy shows recoveries from 98.31% to 101.89% in human serum samples and provides simple, fast and cheap analysis of GPC3, which suggests that it has great potential applications in clinical diagnosis for hepatocellular carcinoma.
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Affiliation(s)
- Huixue Wang
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Jinya Liu
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi 541004, People's Republic of China
| | - Wei Chen
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi 541004, People's Republic of China
| | - Jintong Na
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Yong Huang
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, Guangxi, 530021, China.
| | - Guiyin Li
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, Guangxi, 530021, China; School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi 541004, People's Republic of China.
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Li F, Xie Q, Qin Y, Tong C, Liu B, Wang W. Real-time monitoring and effector screening of APE1 based on rGO assisted DNA nanoprobe. Anal Biochem 2021; 633:114394. [PMID: 34610334 DOI: 10.1016/j.ab.2021.114394] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/23/2021] [Accepted: 09/25/2021] [Indexed: 02/05/2023]
Abstract
Human apurinic/pyrimidine endonuclease 1 (APE1) played a critical role in the occurrence, progress and prognosis of tumors through overexpression and subcellular localization. Thus, it has become an important target for enhancing the sensitivity of tumor cells to radiotherapy and chemotherapy. Therefore, detecting and imaging its intracellular activity is of great significance for inhibitor discovery, cancer diagnosis and therapy. In this work, using DNA-based nanoprobe, we developed a new method for monitor intracellular APE1 activity. The detecting system was consisted by single fluorophore labeled hairpin probe and reduced graphene oxide (rGO). The in vitro result showed that a liner response of the detection method ranged from 0.02 U/mL to 2 U/mL with a limit of detection of 0.02 U/mL. Furthermore, this strategy possessing high specificity was successfully applied for APE1-related inhibitor screening using intracellular fluorescence imaging. Panaxytriol, an effective inhibitor of APE1 activity, was screened from traditional Chinese medicine (TCM) and its effect on APE1 activity was monitored in real time in A549 cells. In summary, this sensitive and specific APE1 detection technology is expected to provide an assistance for APE1-related inhibitor screening and diseases diagnosis.
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Affiliation(s)
- Fei Li
- College of Biology, Hunan University, Changsha, 410082, China
| | - Qian Xie
- TCM and Ethnomedicine Innovation & Development International Laboratory, Innovative Materia Medica Research Institute, School of Pharmacy, Hunan University of Chinese Medicine, Changsha 410208, China
| | - Yan Qin
- College of Biology, Hunan University, Changsha, 410082, China; TCM and Ethnomedicine Innovation & Development International Laboratory, Innovative Materia Medica Research Institute, School of Pharmacy, Hunan University of Chinese Medicine, Changsha 410208, China
| | - Chunyi Tong
- College of Biology, Hunan University, Changsha, 410082, China
| | - Bin Liu
- College of Biology, Hunan University, Changsha, 410082, China.
| | - Wei Wang
- TCM and Ethnomedicine Innovation & Development International Laboratory, Innovative Materia Medica Research Institute, School of Pharmacy, Hunan University of Chinese Medicine, Changsha 410208, China.
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Qin Y, Long Y, Zhou T, Luo R, Tong C, Xie Q, Wang W, Liu B. A rGO-DNAzyme assisted fluorescence method for sensitive RNase A activity assay and natural compound screening. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:4298-4306. [PMID: 34473139 DOI: 10.1039/d1ay01053k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As a key regulator of human physiology and metabolic processes, ribonuclease (RNase) A can be used as an important biomarker for predicting human disease occurrence. Hence, establishing sensitive methods for tracking RNase A activity in vitro and in living cells is of great importance. Herein, we present a convenient fluorescence method assisted by reduced graphene oxide (rGO) and DNAzyme mediated fluorescence signal release for RNase A assay. The fluorescence change of the new method showed a positive linear relation with RNase A concentration in the range from 0.5 pg μL-1 to 1 ng μL-1 with a detection limit of 0.089 pg μL-1. By using this method to screen the effector of RNase A from natural compounds, the natural compound of B6 was found to stimulate RNase A activity in vitro and in vivo, the result of which was supported by the real-time imaging of RNase A in living cells. In summary, this fluorescence method with high sensitivity and specificity provides an alternative for RNase A activity assay and effector screening.
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Affiliation(s)
- Yan Qin
- College of Biology, Hunan University, Changsha, 410082, P. R. China.
- TCM and Ethnomedicine Innovation & Development International Laboratory, Innovative Material Medical Research Institute, School of Pharmacy, Hunan University of Chinese Medicine, Changsha, 410208, P. R. China.
| | - Ying Long
- College of Biology, Hunan University, Changsha, 410082, P. R. China.
| | - Ting Zhou
- College of Biology, Hunan University, Changsha, 410082, P. R. China.
| | - Ruxin Luo
- College of Biology, Hunan University, Changsha, 410082, P. R. China.
| | - Chunyi Tong
- College of Biology, Hunan University, Changsha, 410082, P. R. China.
| | - Qian Xie
- TCM and Ethnomedicine Innovation & Development International Laboratory, Innovative Material Medical Research Institute, School of Pharmacy, Hunan University of Chinese Medicine, Changsha, 410208, P. R. China.
| | - Wei Wang
- TCM and Ethnomedicine Innovation & Development International Laboratory, Innovative Material Medical Research Institute, School of Pharmacy, Hunan University of Chinese Medicine, Changsha, 410208, P. R. China.
| | - Bin Liu
- College of Biology, Hunan University, Changsha, 410082, P. R. China.
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9
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Anti-metastatic cancer activity of ultrasonic synthesized reduced graphene oxide/copper composites. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01866-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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10
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Liu H, Hao C, Nan Z, Qu H, Zhang X, Zhang Z, Sun R. Fabrication of graphene oxide and sliver nanoparticle hybrids for fluorescence quenching of DNA labeled by methylene blue. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 243:118802. [PMID: 32827915 DOI: 10.1016/j.saa.2020.118802] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/29/2020] [Accepted: 08/02/2020] [Indexed: 06/11/2023]
Abstract
Since graphene oxide‑silver nanoparticles (GO-AgNPs) have special affinities to DNA, it become increasingly important in fields of biological analysis in which GO-AgNPs nanocomposites universally functioned as a quencher. In this paper, GO-AgNPs nanocomposites with different GO to AgNPs ratios were synthesized as a fluorescence quencher to interact with DNA labeled by methylene blue (MB). The results showed that the fluorescence intensity of DNA-MB system decreased with the increasing of GO-AgNPs nanocomposites concentration. The quenching phenomenon of DNA-MB by AgNPs and GO was not a simple additive effect but a synergistic effect. The quenching efficiency of synthesized GO-AgNPs nanocomposites with different ratios (1:1, 1:3, 1:5, 1:10) increased with the decrease of GO/Ag ratio. Thermodynamic analysis was employed to investigate the interaction of GO-AgNPs and DNA-MB, it can be concluded that the intermolecular force between GO-AgNPs and DNA-MB was hydrogen bonding. Our works will provide important theoretical and experimental bases for fluorescence sensing of DNA.
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Affiliation(s)
- Hengyu Liu
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Changchun Hao
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Zhezhu Nan
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Hongjin Qu
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Xianggang Zhang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Ziyi Zhang
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Runguang Sun
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
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Liu B, Zhao Y, Jia Y, Liu J. Heating Drives DNA to Hydrophobic Regions While Freezing Drives DNA to Hydrophilic Regions of Graphene Oxide for Highly Robust Biosensors. J Am Chem Soc 2020; 142:14702-14709. [DOI: 10.1021/jacs.0c07028] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Biwu Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Yu Zhao
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yu Jia
- Key Laboratory for Special Functional Materials of Ministry of Education & School of Materials Science and Engineering, Henan University, Kaifeng 475004, People’s Republic of China
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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Wang J, Chen S, Yuan R, Hu F. DNA branched junctions induced the enhanced fluorescence recovery of FAM-labeled probes on rGO for detecting Pb 2. Anal Bioanal Chem 2020; 412:2455-2463. [PMID: 32078003 DOI: 10.1007/s00216-020-02458-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 01/27/2020] [Indexed: 12/18/2022]
Abstract
The reduced graphene oxide (rGO) could strongly adsorb and quench the fluorescence of dye-labeled single-stranded DNA (ssDNA); thus, it is widely applied in fluorescent sensors. However, these sensors may suffer from a limited sensitivity due to the low fluorescence recovery when adding the complementary DNA (cDNA) sequence. In this work, the powerful DNA branched junctions were constructed to improve the fluorescence recovery of FAM-labeled probe on rGO. In the presence of target Pb2+, the ribonucleotide (rA) in the substrate was cleaved specifically and the catalytic hairpin assembly of three metastable hairpins was further initiated, accompanied by the formation of DNA branched junctions. Then, the liberated Pb2+ could be recyclable. Impressively, the DNA branched junctions not only hybridize with the FAM-labeled probes with a high efficiency, but also are significantly undesirable for the rGO. Thus, a high fluorescence recovery of FAM-labeled probe on rGO was expected. The integration of the high fluorescence recovery and dual-cycle signal amplification endows the sensing strategy with a good performance for Pb2+ detection, including low detection limit (0.17 nM), good selectivity, and satisfactory practical applicability. The proposed DNA branched junctions offer a novel avenue to improve the fluorescence recovery of the dye-labeled probes on rGO for biological analysis.
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Affiliation(s)
- Juanli Wang
- Chongqing Engineering Laboratory of Nanomaterials & Sensor Technologies, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Shihong Chen
- Chongqing Engineering Laboratory of Nanomaterials & Sensor Technologies, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China.
| | - Ruo Yuan
- Chongqing Engineering Laboratory of Nanomaterials & Sensor Technologies, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Fangxin Hu
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, 215009, Jiangsu, China
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13
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Xu X, Xing S, Xu M, Fu P, Gao T, Zhang X, Zhao Y, Zhao C. Highly sensitive and specific screening of EGFR mutation using a PNA microarray-based fluorometric assay based on rolling circle amplification and graphene oxide. RSC Adv 2019; 9:38298-38308. [PMID: 35540182 PMCID: PMC9075832 DOI: 10.1039/c9ra06758b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/16/2019] [Indexed: 01/23/2023] Open
Abstract
Screening epidermal growth factor receptor (EGFR) mutations, especially deletions, is essential for diagnosis of non-small cell lung cancer (NSCLC) and also critical to inform treatment decisions for NSCLC patients. Here, we demonstrated a facile peptide nucleic acid (PNA) microarray-based fluorometric method for sensitive and specific detection of EGFR mutation, using rolling circle amplification (RCA), graphene oxide (GO), and a fluorescently-labeled detection probe (F-DP). First, the EGFR gene sequence was efficiently captured by the label-free PNA probe which was attached on the surface of a 96-well plate. And then, the EGFR mutation sequence was specifically amplified by RCA using the circular DNA, which was formed by the ligation of the padlock probe when hybridizing with the EGFR mutation, as a template. The single-stranded RCA product (RCAP) was then sensitively detected with the F-DP and GO system. This method has a detection limit of 0.3 pM for EGFR mutation and a high discrimination capability to target EGFR mutation against EGFR wildtype. The use of a PNA microarray and a fluorescence quenching platform make this system quite suitable for high-throughput analysis of EGFR mutations in resource-limited settings without the need of costly and cumbersome equipment. Furthermore, this detection system provides a novel way for the diagnosis of other diseases that are caused by gene deletion mutations.
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Affiliation(s)
- Xiaojun Xu
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
- Institute of Pharmaceutical Chemistry, Zhejiang Pharmaceutical College Ningbo 315100 P. R. China
| | - Shu Xing
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
| | - Mengjia Xu
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Pan Fu
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Tingting Gao
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
| | - Xiaokang Zhang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
| | - Yang Zhao
- College of Science and Technology, Ningbo University Ningbo 315212 P. R. China
| | - Chao Zhao
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China
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14
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Fan J, Tong C, Dang W, Qin Y, Liu X, Liu B, Wang W. An rGONS-based biosensor for simultaneous imaging of p53 and p21 mRNA in living cells. Talanta 2019; 204:20-28. [DOI: 10.1016/j.talanta.2019.05.087] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 05/15/2019] [Accepted: 05/20/2019] [Indexed: 01/09/2023]
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15
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Nitrogen-doped porous carbon-based fluorescence sensor for the detection of ZIKV RNA sequences: fluorescence image analysis. Talanta 2019; 205:120091. [PMID: 31450455 DOI: 10.1016/j.talanta.2019.06.091] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 06/21/2019] [Accepted: 06/26/2019] [Indexed: 12/21/2022]
Abstract
Many studies have demonstrated that metal-organic frameworks (MOFs) are universal fluorescence quenchers for DNA/RNA detection. Nevertheless, the structural stability of many MOFs is relatively weak, which limits their practical applications. Thus, it remains a great interest to develop constitutionally stable nano biosensor suitable for application in the complex environment. Herein, a new angle of nitrogen-doped porous carbon (NPC) obtained from MOFs-based precursors by virtue of a simple method was applied as a nano biosensor for the fluorescence detection of Zika virus (ZIKV) RNA sequences. The fluorescence signal capturing was carried out by using a charge-coupled device (CCD)-based imaging system. The NPC could adsorb TAMRA-tagged ZIKV RNA probe (P-DNA) to form P-DNA@NPC complex accompanied by substantial fluorescence quenching. Upon adding the complementary target RNA (T-RNA), the P-DNA could release from NPC by forming a double-stranded hybrid and induce the fluorescence recovery. The P-DNA@NPC complex was valid and reliable for ZIKV RNA sequences assay with a limit of detection (LoD) at 0.23 nM, which is superior to many of the previously reported fluorescent DNA sensors. Moreover, it could distinguish mismatched RNA and was effective in detecting ZIKV RNA sequences spiked in the human saliva sample. We envision that this study would offer an interesting new angle on the potential integrating application of carbon nanomaterials and CCD-based fluorescence imaging platform in the field of nucleic acid assay.
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16
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Niu J, Hu X, Ouyang W, Chen Y, Liu S, Han J, Liu L. Femtomolar Detection of Lipopolysaccharide in Injectables and Serum Samples Using Aptamer-Coupled Reduced Graphene Oxide in a Continuous Injection-Electrostacking Biochip. Anal Chem 2019; 91:2360-2367. [PMID: 30576605 DOI: 10.1021/acs.analchem.8b05106] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A method for microfluidic sample preconcentration to detect femtomolar level of lipopolysaccharide (LPS) is introduced, enabled by 6-carboxyfluorescein (6-FAM) labeled aptamer-LPS binding along with reduced graphene oxide (rGO). The free FAM-aptamers can be adsorbed onto the surface of rGO, resulting in fluorescence quenching of background signals. Conversely, the aptamer-LPS complex cannot be adsorbed by rGO, so the fluorescence is maintained and detected. When an electric field is applied across the microchannel with Nafion membrane in the chip, only the fluorescence of aptamer-LPS complex can be detected and stacked by continuous injection-electrostacking (CI-ES). The method shows a high selectivity (in the presence of pyrophosphate, FAD+, NAD+, AMP, ADP, ATP, phosphatidylcholine, LTA, and β-d-glucans which respond positively to LAL) to LPS and an extreme sensitivity with the limit of detection (LOD) at 7.9 fM (7.9 × 10-4 EU/mL) and 8.3 fM (8.3 × 10-4 EU/mL) for water sample and serum sample, respectively. As a practical application, this method can detect LPS in injections and serum samples of human and sepsis model mouse and quickly distinguish Gram-negative bacteria Escherichia coli ( E. coli) from Gram-positive bacteria Staphylococcus aureus ( S. aureus) and fungus Candida albicans ( C. albicans). More importantly, by changing the aptamers based on different targets, we can detect different analytes. Therefore, aptamer-coupled rGO in a CI-ES biochip is a universal, sensitive, and specific method. For TOC only.
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Affiliation(s)
- Junxin Niu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
| | - Xiumei Hu
- Department of Laboratory Medicine, Nanfang Hospital , Southern Medical University , Guangzhou 510515 , China
| | - Wei Ouyang
- Department of Electrical Engineering and Computer Science , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Yue Chen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
| | - Shuwen Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
| | - Jongyoon Han
- Department of Electrical Engineering and Computer Science , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States.,Department of Biological Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Lihong Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
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17
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Fan J, Yuan L, Liu Q, Tong C, Wang W, Xiao F, Liu B, Liu X. An ultrasensitive and simple assay for the Hepatitis C virus using a reduced graphene oxide-assisted hybridization chain reaction. Analyst 2019; 144:3972-3979. [DOI: 10.1039/c9an00179d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hepatitis C virus (HCV) is a major cause of chronic liver disease, which affects 2–3% of the world population.
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Affiliation(s)
- Jialong Fan
- College of Biology
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation
- Hunan University
- Changsha
- China
| | - Liqun Yuan
- People's Hospital of Hunan Province
- Changsha
- China
| | - Qingxin Liu
- Jiangsu Vocational College of Agriculture and Forestry
- China; College of Veterinary Medicine
- Nanjing Agricultural University
- Jurong
- Nanjing
| | - Chunyi Tong
- College of Biology
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation
- Hunan University
- Changsha
- China
| | - Wenmiao Wang
- College of Biology
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation
- Hunan University
- Changsha
- China
| | - Feng Xiao
- College of Biology
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation
- Hunan University
- Changsha
- China
| | - Bin Liu
- College of Biology
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation
- Hunan University
- Changsha
- China
| | - Xuanming Liu
- College of Biology
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation
- Hunan University
- Changsha
- China
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18
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Lu L, Wang J, Miao W, Wang X, Guo G. Electrogenerated Chemiluminescence Biosensor with a Tripod Probe for the Highly Sensitive Detection of MicroRNA. Anal Chem 2018; 91:1452-1459. [DOI: 10.1021/acs.analchem.8b04271] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Liping Lu
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Jiaxing Wang
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Wujian Miao
- Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Xiayan Wang
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Guangsheng Guo
- College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
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19
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Ouyang L, Deng Y, Yang L, Shi X, Dong T, Tai Y, Yang W, Chen ZG. Graphene-Oxide-Decorated Microporous Polyetheretherketone with Superior Antibacterial Capability and In Vitro Osteogenesis for Orthopedic Implant. Macromol Biosci 2018; 18:e1800036. [DOI: 10.1002/mabi.201800036] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/08/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Ling Ouyang
- School of Materials Science and Engineering; Sichuan University; Chengdu 610065 China
| | - Yi Deng
- School of Chemical Engineering; Sichuan University; Chengdu 610065 China
- Department of Mechanical Engineering; The University of Hong Kong; 999077 Hong Kong China
| | - Lei Yang
- School of Materials Science and Engineering; Sichuan University; Chengdu 610065 China
| | - Xiuyuan Shi
- School of Materials Science and Engineering; Sichuan University; Chengdu 610065 China
| | - Taosheng Dong
- School of Materials Science and Engineering; Sichuan University; Chengdu 610065 China
| | - Youyi Tai
- School of Materials Science and Engineering; Sichuan University; Chengdu 610065 China
| | - Weizhong Yang
- School of Materials Science and Engineering; Sichuan University; Chengdu 610065 China
| | - Zhi-Gang Chen
- Centre for Future Materials; University of Southern Queensland; Springfield QLD 4300 Australia
- Materials Engineering; The University of Queensland; Brisbane QLD 4072 Australia
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20
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Application of nanomaterials for the electrical and optical detection of the hepatitis B virus. Anal Biochem 2018; 549:157-163. [DOI: 10.1016/j.ab.2018.03.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 03/24/2018] [Accepted: 03/25/2018] [Indexed: 01/23/2023]
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21
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Tong C, Zhao C, Liu B, Li B, Ai Z, Fan J, Wang W. Sensitive Detection of RNase A Activity and Collaborative Drug Screening Based on rGO and Fluorescence Probe. Anal Chem 2018; 90:2655-2661. [PMID: 29368520 DOI: 10.1021/acs.analchem.7b04429] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
In addition to being an important object in theoretical and experimental studies in enzymology, RNase A also plays an important role in the development of many kinds of diseases by regulating various physiological or pathological processes, including cell growth, proliferation, differentiation, and invasion. Thus, it can be used as a useful biomarker for disease theranostics. Here, a simple, sensitive, and low-cost assay for RNase A was constructed by combining a fluorogenic substrate with reduced graphene oxide (rGO). The method with detection limit of 0.05 ng/mL was first applied for RNase A targeted drug screening, and 14 natural compounds were identified as activators of this enzyme. Then, it was applied to detect the effect of drug treatment and Hepatitis B virus (HBV) infection on RNase A activity. The results indicated that RNase A level in tumor cells was upregulated by G-10 and Chikusetsusaponin V in a concentration-dependent manner, while the average level of RNase A in the HBV infection group was significantly inhibited compared with that in the control group. Furthermore, the concentration-dependent inhibitory effect of heavy metal ions on RNase A was observed using the method and the results indicated that Ba2+, Co2+, Pb2+, As3+, and Cu2+ inhibited RNase A activity with IC50 values of 93.7 μM (Ba2+), 90.9 μM (Co2+), 110.6 μM (Pb2+), 171.5 μM (As3+), and 165.1 μM (Cu2+), respectively. In summary, considering the benefits of rapidity and high sensitivity, the method is practicable for RNase A assay in biosamples and natural compounds screening in vitro and in vivo.
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Affiliation(s)
- Chunyi Tong
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chem/Biosensing and Chemometrics, Hunan University , Changsha 410082, China
| | - Chuan Zhao
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chem/Biosensing and Chemometrics, Hunan University , Changsha 410082, China
| | - Bin Liu
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chem/Biosensing and Chemometrics, Hunan University , Changsha 410082, China
| | - Bin Li
- TCM and Ethnomedicine Innovation & Development Laboratory, School of Pharmacy, Hunan University of Chinese Medicine , Changsha 410208, China
| | - Zhaoyang Ai
- Institute of Cognition and Bio-physics Linguistics, College of FLs, Hunan University , Changsha 410082, China
| | - Jialong Fan
- College of Biology, Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chem/Biosensing and Chemometrics, Hunan University , Changsha 410082, China
| | - Wei Wang
- TCM and Ethnomedicine Innovation & Development Laboratory, School of Pharmacy, Hunan University of Chinese Medicine , Changsha 410208, China
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22
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Varadwaj GBB, Oyetade OA, Rana S, Martincigh BS, Jonnalagadda SB, Nyamori VO. Facile Synthesis of Three-Dimensional Mg-Al Layered Double Hydroxide/Partially Reduced Graphene Oxide Nanocomposites for the Effective Removal of Pb 2+ from Aqueous Solution. ACS APPLIED MATERIALS & INTERFACES 2017; 9:17290-17305. [PMID: 28475300 DOI: 10.1021/acsami.6b16528] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A series of three-dimensional (3D) porous nanocomposites, comprised of partially reduced graphene oxide (pRGO) and CO32- containing Mg-Al layered double hydroxide, were synthesized in two steps. In the first step, graphene oxide (GO) was fabricated by a modified Hummers' method, and, subsequently, in the second step layered double hydroxide (LDH) nanosheets were homogeneously grown on the surface of the GO sheets by an in situ crystallization approach, involving a facile coprecipitation technique. The alkaline medium used for the in situ growth of LDH on the GO surface resulted in the partial reduction of GO to pRGO, which was confirmed by XRD. XRD also revealed the successful formation of crystalline LDH nanosheets on the surface of pRGO, whereas FTIR spectroscopy confirmed the presence of different functional groups in the nanocomposites. Nitrogen adsorption-desorption studies of the prepared nanocomposites revealed them as high surface area porous materials. Electron microscopic techniques, like TEM and SEM, confirmed that the architectures of the prepared nanocomposites displayed an interconnected 3D network, where a number of LDH nanosheets were interwoven on the surface of pRGO. The elemental mapping and EDX analysis qualitatively confirmed the presence of all of the expected elements in the fabricated nanocomposites. Because of the unique 3D porous network and the presence of a large number of oxygen-containing functional groups, the prepared nanocomposites proved suitable for the adsorption of Pb2+ ions from aqueous solution with a maximum adsorption capacity of 116.2 mg g-1. Equilibrium was achieved after 180 min on conducting the adsorption experiments at pH 4.5. Desorption experiments established the possibility of recovering the metal ions as well as the regeneration of adsorbents for repeated use.
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Affiliation(s)
- G Bishwa Bidita Varadwaj
- School of Chemistry and Physics, and ‡School of Health Sciences, University of KwaZulu-Natal , Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Oluwaseun A Oyetade
- School of Chemistry and Physics, and ‡School of Health Sciences, University of KwaZulu-Natal , Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Surjyakanta Rana
- School of Chemistry and Physics, and ‡School of Health Sciences, University of KwaZulu-Natal , Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Bice S Martincigh
- School of Chemistry and Physics, and ‡School of Health Sciences, University of KwaZulu-Natal , Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Sreekantha B Jonnalagadda
- School of Chemistry and Physics, and ‡School of Health Sciences, University of KwaZulu-Natal , Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Vincent O Nyamori
- School of Chemistry and Physics, and ‡School of Health Sciences, University of KwaZulu-Natal , Westville Campus, Private Bag X54001, Durban 4000, South Africa
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23
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Sapkota B, Benabbas A, Lin HYG, Liang W, Champion P, Wanunu M. Peptide-Decorated Tunable-Fluorescence Graphene Quantum Dots. ACS APPLIED MATERIALS & INTERFACES 2017; 9:9378-9387. [PMID: 28252932 DOI: 10.1021/acsami.6b16364] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We report here the synthesis of graphene quantum dots with tunable size, surface chemistry, and fluorescence properties. In the size regime 15-35 nm, these quantum dots maintain strong visible light fluorescence (mean quantum yield of 0.64) and a high two-photon absorption (TPA) cross section (6500 Göppert-Mayer units). Furthermore, through noncovalent tailoring of the chemistry of these quantum dots, we obtain water-stable quantum dots. For example, quantum dots with lysine groups bind strongly to DNA in solution and inhibit polymerase-based DNA strand synthesis. Finally, by virtue of their mesoscopic size, the quantum dots exhibit good cell permeability into living epithelial cells, but they do not enter the cell nucleus.
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Affiliation(s)
- Bedanga Sapkota
- Department of Physics, Northeastern University , Boston, Massachusetts 02115, United States
| | - Abdelkrim Benabbas
- Department of Physics, Northeastern University , Boston, Massachusetts 02115, United States
| | - Hao-Yu Greg Lin
- Center for Nanoscale Systems, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Wentao Liang
- Department of Biology, Northeastern University , Boston, Massachusetts 02115, United States
| | - Paul Champion
- Department of Physics, Northeastern University , Boston, Massachusetts 02115, United States
| | - Meni Wanunu
- Department of Physics, Northeastern University , Boston, Massachusetts 02115, United States
- Department of Chemistry and Chemical Biology, Northeastern University , Boston, Massachusetts 02115, United States
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24
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Tyagi A, Chu KL, Abidi IH, Cagang AA, Zhang Q, Leung NLC, Zhao E, Tang BZ, Luo Z. Single-probe multistate detection of DNA via aggregation-induced emission on a graphene oxide platform. Acta Biomater 2017; 50:334-343. [PMID: 27940196 DOI: 10.1016/j.actbio.2016.12.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 11/23/2016] [Accepted: 12/05/2016] [Indexed: 01/27/2023]
Abstract
Graphene and graphene oxides (GO), or their reduced forms, have been introduced in a variety of biosensing platforms and have exhibited enhanced performance levels in these forms. We herein report a DNA sensing platform consisting of aggregation-induced emission (AIE) molecules and complementary DNA (comDNA) adsorbed on GO. We experimentally turned the AIE molecule on and off by adjusting its distance, which correlates with DNA structures as shown in our computational results, from the GO sheet, which quenches depending on its distance from the graphene plane. The changes in florescence are reproducible, which demonstrates the probe's ability to identify the binding state of the DNA. Our molecular dynamics simulation results reveal strong π-π interactions between single-strand DNA (ssDNA) and GO, which enable the ssDNA molecule to move closer to the graphene oxide. This reduces the center of mass and binding free energies in the simulation. When hybridized with comDNA, the increased distance, evidenced by the reduced interaction, eliminates the quenching effect and turns on the AIE molecule. Our protocol use of the AIE molecule as a probe thus avoids the complicated steps involved in covalent functionalization and allows the rapid and label-free detection of DNA molecules. STATEMENT OF SIGNIFICANCE A simple, rapid method of fluorescent measurement of DNA hybridization in the presence of graphene (oxide) is presented. Conventional fluorescent dyes offer high performance in biosensors. However, labeling procedures are synthetically demanding in time and resources making it less cost-effective. Molecules with aggregation-induced-emission (AIE) property have advantages over traditional fluorescent molecules because of their intrinsic preference for detection as a turn-on probe and their single-molecule detection ability. Previous work has shown AIE dyes act as excellent "label-free" bioprobes with high sensitivity but with limited selectivity. Graphene oxide (GO) with its unique optical properties and affinity to different kinds of biomolecules can be used as an auxiliary to enhance selectivity of AIE dyes. In this work, we report a label-free strategy to detect DNA of particular sequence by water-soluble AIE probes with the aid of GO, supported by the computational explanations for this phenomenon.
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Affiliation(s)
- Abhishek Tyagi
- Department of Chemical and Biomolecular Engineering and The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Kin Leung Chu
- Department of Chemical and Biomolecular Engineering and The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Irfan Haider Abidi
- Department of Chemical and Biomolecular Engineering and The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Aldrine Abenoja Cagang
- Department of Chemical and Biomolecular Engineering and The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Qicheng Zhang
- Department of Chemical and Biomolecular Engineering and The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Nelson L C Leung
- Department of Chemistry and Division of Biomedical Engineering, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Engui Zhao
- Department of Chemistry and Division of Biomedical Engineering, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Ben Zhong Tang
- Department of Chemistry and Division of Biomedical Engineering, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Zhengtang Luo
- Department of Chemical and Biomolecular Engineering and The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong.
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25
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Gutierrez FA, Bedatty Fernandes FC, Rivas GA, Bueno PR. Mesoscopic behaviour of multi-layered graphene: the meaning of supercapacitance revisited. Phys Chem Chem Phys 2017; 19:6792-6806. [DOI: 10.1039/c6cp07775g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The double layer capacitive phenomena is just a particular case of a more general quantum mechanical approach, wherein the electrochemical capacitance is central hence governing the super-capacitance phenomenology in general.
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Affiliation(s)
- Fabiana A. Gutierrez
- Instituto de Química
- Univ. Estadual Paulista (UNESP)
- Departamento de Físico-Química
- Nanobionics Research Group
- Araraquara
| | - Flavio C. Bedatty Fernandes
- Instituto de Química
- Univ. Estadual Paulista (UNESP)
- Departamento de Físico-Química
- Nanobionics Research Group
- Araraquara
| | - Gustavo A. Rivas
- Instituto de Investigaciones en Físico-química de Córdoba
- Universidad Nacional de Córdoba
- Facultad de Ciencias Químicas
- Córdoba
- Argentina
| | - Paulo R. Bueno
- Instituto de Química
- Univ. Estadual Paulista (UNESP)
- Departamento de Físico-Química
- Nanobionics Research Group
- Araraquara
| |
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