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Graphene cancer

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https://www.readbyqxmd.com/read/28919753/combination-of-graphene-oxide-silver-nanoparticle-nanocomposites-and-cisplatin-enhances-apoptosis-and-autophagy-in-human-cervical-cancer-cells
#1
Yu-Guo Yuan, Sangiliyandi Gurunathan
BACKGROUND: Cisplatin (Cis) is a widely used chemotherapeutic drug for treating a variety of cancers, due to its ability to induce cell death in cancer cells significantly. Recently, graphene and its modified nanocomposites have gained much interest in cancer therapy, due to their unique physicochemical properties. The objective of this study was to investigate the combination effect of Cis and a reduced graphene oxide-silver nanoparticle nanocomposite (rGO-AgNPs) in human cervical cancer (HeLa) cells...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28917803/atp-mediated-rolling-circle-amplification-and-opening-dna-gate-for-drug-delivery-to-cell
#2
Yujie Wang, Xinxin Shang, Jia Liu, Yingshu Guo
Here, we have developed a facile fluorometric system for the detection of adenosine triphosphate (ATP) by a rolling circle amplification (RCA) based on proximity ligation mediated amplification, and simultaneously achieved the release of the anticancer drug doxorubicin (DOX) through the mesoporous silicon system. Once the ATP molecule is present, the linker DNA will be released from the graphene oxide (GO) surface and hybridized to the template DNA of the GO surface joining with ligation enzyme. RCA reaction is followed by the addition of the phi29 DNA polymerase...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28905618/functionalization-of-reduced-graphene-oxide-via-thiol-maleimide-click-chemistry-facile-fabrication-of-targeted-drug-delivery-vehicles
#3
Yavuz Oz, Alexandre Barras, Rana Sanyal, Rabah Boukherroub, Sabine Szunerits, Amitav Sanyal
Reduced graphene oxide (rGO) based materials have shown to be amenable to non-covalent functionalization through hydrophobic interactions. The scaffold however does not provide sufficient covalent linkage given the low number of reactive carboxyl and alcohol groups typically available on rGO. The integration of clickable groups, particularly ones which can undergo efficient conjugation without any metal catalyst, would allow facile functionalization of these materials. This study reports on the non-covalent association of a maleimide-containing catechol (dopa-MAL) surface anchor onto rGO...
September 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28903003/tumor-cell-specific-nuclear-targeting-of-functionalized-graphene-quantum-dots-in-vivo
#4
Chenjie Yao, Yusong Tu, Lin Ding, Chenchen Li, Jiao Wang, Haiping Fang, Yanan Huang, Kangkang Zhang, Quan Lu, Minghong Wu, Yanli Wang
Specific targeting of tumor tissues is essential for tumor imaging and therapeutics but remains challenging. Here, we report an unprecedented method using synthetic sulfonic-graphene quantum dots (sulfonic-GQDs) to exactly target the cancer cell nuclei in vivo without any bio- ligand modification, with no intervention in cells of normal tissues. The key factor for such selectivity is the high interstitial fluid pressure (IFP) in tumor tissues, which allows the penetration of sulfonic-GQDs into the plasma membrane of tumor cells...
September 13, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28901740/inhibiting-metastasis-and-preventing-tumor-relapse-by-triggering-host-immunity-with-tumor-targeted-photodynamic-therapy-using-photosensitizer-loaded-functional-nanographenes
#5
Xinhe Yu, Duo Gao, Liquan Gao, Jianhao Lai, Chenran Zhang, Yang Zhao, Lijun Zhong, Bing Jia, Fan Wang, Xiaoyuan Chen, Zhaofei Liu
Effective cancer therapy depends not only on destroying the primary tumor but also on conditioning the host immune system to recognize and eliminate residual tumor cells and prevent metastasis. In this study, a tumor integrin αvβ6-targeting peptide (the HK peptide)-functionalized graphene oxide (GO) was coated with a photosensitizer (HPPH). The resulting GO conjugate, GO(HPPH)-PEG-HK, was investigated whether it could destroy primary tumors and boost host antitumor immunity. We found that GO(HPPH)-PEG-HK exhibited significantly higher tumor uptake than GO(HPPH)-PEG and HPPH...
September 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28898912/application-of-graphene-and-its-derivatives-in-cancer-diagnosis-and-treatment
#6
S Ghanbarzadeh, H Hamishehkar
Although chemotherapies are successful in some cases, systemic toxicity could be simultaneously observed due to the lack of drugs selectivity to cancerous tissues, leading to the failure of the chemotherapies. Furthermore, the therapeutic effects will be significantly improved if the anticancer drugs could be delivered to cancer cells with high selectivity. In recent years, there have been many advances in the field of diagnosis and treatment of cancer as a result of the development of novel materials with noticeable and often unique properties...
September 12, 2017: Drug Research
https://www.readbyqxmd.com/read/28898464/functionalized-ultrasmall-fluorinated-graphene-with-high-nir-absorbance-for-controlled-delivery-of-mixed-anticancer-drugs
#7
Peiwei Gong, Qiao Zhao, Dujuan Dai, Shumiao Zhang, Zhenzhen Tian, Lu Sun, Jiashuo Ren, Zhe Liu
Fluorinated graphene (FG) possess distinctively novel properties different from graphene and is suitable for many biomedical applications. However, the hydrophobic nature and inert property of FG are limiting its further application as biological materials. Here we show the preparation of nanosized FG (60 nm) that exhibits high NIR absorbance for photothermal therapy. In order to make it stable in physiological solutions, FG is enriched with oxygen and followed by covalent binding with chitosan as a novel pH-responsive nanocarrier...
September 12, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28892752/graphene-quantum-dots-suppress-proinflammatory-t-cell-responses-via-autophagy-dependent-induction-of-tolerogenic-dendritic-cells
#8
Sergej Tomić, Kristina Janjetović, Dušan Mihajlović, Marina Milenković, Tamara Kravić-Stevović, Zoran Marković, Biljana Todorović-Marković, Zdenko Spitalsky, Matej Micusik, Dragana Vučević, Miodrag Čolić, Vladimir Trajković
Graphene quantum dots (GQD) are atom-thick nanodimensional carbon sheets with excellent physico-chemical and biological properties, making them attractive for application in theranostics. However, their immunoregulatory properties are insufficiently investigated, especially in human primary immune cells. We found that non-toxic doses of GQD inhibit the production of proinflammatory and T helper (Th)1 cytokines, and augment the production of anti-inflammatory and Th2 cytokines by human peripheral blood mononuclear cells...
August 29, 2017: Biomaterials
https://www.readbyqxmd.com/read/28891194/suspended-graphene-oxide-nanoparticle-for-accelerated-multilayer-osteoblast-attachment
#9
Tahereh Foroutan, Negin Nazemi, Mohadeseh Tavana, Mohammad Zaman Kassaee, Elaheh Motamedi, Shima Soieshargh, Hadi Zare Zardini
Mimicking bone tissues having layered structures is still a significant challenge because of the lack of technologies to assemble osteoblast cell types into bone structures. One of the promising and attractive materials in biomedical and different engineering fields is graphene and graphene-based nanostructures such as graphene oxide (GO) because of their unique properties. In most studies, GO was synthesized using chemical vapor deposition (CDV) method, and was coated on the substrate. In this study, we proposed a simple technique for assembly of cells that facilitates the construction of osteoblast -like structures using suspended GO synthesized by graphite powder, H2SO4, and KMnO4...
September 10, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28887966/core-shell-structured-polypyrrole-mesoporous-sio2-nanocomposite-capped-with-graphene-quantum-dots-as-gatekeeper-for-irradiation-controlled-release-of-methotrexate
#10
Xiaolin Liu, Dan Shou, Chuanxiang Chen, Huihui Mao, Yong Kong, Yongxin Tao
A core-shell structured nanocomposite of polypyrrole/mesoporous SiO2 (PPy/mSiO2) is rationally designed as the nanocarrier for methotrexate (MTX), a chemotherapeutic drug for cancer treatment. Graphene quantum dots (GQDs) are introduced to the outer surface of PPy/mSiO2, and it functions as a gatekeeper for the loaded MTX through the formation of H-bonds with the functionalized mSiO2. In the proposed nanocarrier for MTX, the mesopores in mSiO2 are beneficial for the accommodation of MTX, resulting in enhanced encapsulation capacity of the nanocarrier; on the other hand, PPy can effectively convert the near-infrared (NIR) light to heat...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28887565/rapid-synthesis-and-decoration-of-reduced-graphene-oxide-with-gold-nanoparticles-by-thermostable-peptides-for-memory-device-and-photothermal-applications
#11
Sachin V Otari, Manoj Kumar, Muhammad Zahid Anwar, Nanasaheb D Thorat, Sanjay K S Patel, Dongjin Lee, Jai Hyo Lee, Jung-Kul Lee, Yun Chan Kang, Liaoyuan Zhang
This article presents novel, rapid, and environmentally benign synthesis method for one-step reduction and decoration of graphene oxide with gold nanoparticles (NAuNPs) by using thermostable antimicrobial nisin peptides to form a gold-nanoparticles-reduced graphene oxide (NAu-rGO) nanocomposite. The formed composite material was characterized by UV/Vis spectroscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, and high-resolution transmission electron microscopy (HR-TEM)...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28876901/flexible-graphene-based-wearable-gas-and-chemical-sensors
#12
Eric Singh, M Meyyappan, Hari S Nalwa
Wearable electronics is expected to be one of the most active research areas in the next decade, therefore, nanomaterials possessing high carrier mobility, optical transparency, mechanical robustness and flexibility, light-weight, and environmental stability will be in immense demand. Graphene is one of the nanomaterials that fulfill all these requirements, along with other inherently unique properties and convenience to fabricate into different morphological nanostructures, from atomically thin single layers to nanoribbons...
September 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28863276/immobilization-of-methotrexate-anticancer-drug-onto-the-graphene-surface-and-interaction-with-calf-thymus-dna-and-4t1-cancer-cells
#13
Reza Karimi Shervedani, Hadiseh Mirhosseini, Marzieh Samiei Foroushani, Mostafa Torabi, Fatemeh Rahnemaye Rahsepar, Leila Norouzi-Barough
Immobilization of methotrexate (MTX) anticancer drug onto the graphene surface is reported through three methods, including either covalent linkage via (a) EDC/NHS organic activators and (b) electrografting of MTX diazonium salt, or (c) noncovalent bonding, resulting in three different systems. To evaluate the interaction ability of the immobilized MTX with biological species, calf thymus DNA (ctDNA), mouse 4T1 breast tumor, and Human foreskin fibroblast (hFF) cells as models of the primary intracellular target of anticancer drugs, cancer and normal cells, respectively, are examined...
August 18, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28860751/quercetin-mediated-synthesis-of-graphene-oxide-silver-nanoparticle-nanocomposites-a-suitable-alternative-nanotherapy-for-neuroblastoma
#14
Yu-Guo Yuan, Yan-Hong Wang, Hui-Hui Xing, Sangiliyandi Gurunathan
BACKGROUND: Graphene and graphene-related materials have gained substantial interest from both academia and industry for the development of unique nanomaterials for biomedical applications. Graphene oxide (GO) and silver nanoparticles (AgNPs) are a valuable platform for the development of nanocomposites, permitting the combination of nanomaterials with different physical and chemical properties to generate novel materials with improved and effective functionalities in a single platform...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28841283/evaluation-of-the-photothermal-properties-of-a-reduced-graphene-oxide-arginine-nanostructure-for-near-infrared-absorption
#15
Mohadeseh Hashemi, Meisam Omidi, Bharadwaj Muralidharan, Hugh D C Smyth, Mohammad Ali Mohagheghi, Javad Mohammadi, Thomas E Milner
Strong near-infrared (NIR) absorption of reduced graphene oxide (rGO) make this material a candidate for photothermal therapy. The use of rGO has been limited by low stability in aqueous media due to the lack of surface hydrophilic groups. We report synthesis of a novel form of reduced graphene-arginine (rGO-Arg) as a nanoprobe. Introduction of Arg to the surface of rGO not only increases the stability in aqueous solutions but also increases cancer cell uptake. Atomic force microscopy (AFM) and transmission electron microscopy (TEM) images are recorded to characterize the morphology of rGO-Arg...
August 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28820986/an-ultrasensitive-sandwich-type-electrochemical-immunosensor-based-on-the-signal-amplification-strategy-of-echinoidea-shaped-au-ag-cu2o-nanoparticles-for-prostate-specific-antigen-detection
#16
Yuying Yang, Qin Yan, Qing Liu, Yongpeng Li, Hui Liu, Ping Wang, Lei Chen, Daopeng Zhang, Yueyun Li, Yunhui Dong
Highly sensitive determination of tumor markers plays an important role in early diagnosis of cancer. Herein, a novel and ultrasensitive sandwich-type electrochemical immunosensor was fabricated for quantitative detection of prostate specific antigen (PSA). In this process, gold nanoparticles functionalized nitrogen-doped graphene quantum dots (Au@N-GQDs) was synthesized through a simple and green hydrothermal procedure to enhance conductivity, specific electrode surface area and quantity of immobilized primary antibodies (Ab1)...
August 10, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28811015/multiple-targeted-graphene-based-nanocarrier-for-intracellular-imaging-of-mrnas
#17
Ying Wang, Zhaohui Li, Misha Liu, Jinjin Xu, Dehong Hu, Yuehe Lin, Jinghong Li
Simultaneous detection and imaging of multiple intracellular messenger RNA (mRNAs) hold great significant for early cancer diagnostics and preventive medicine development. Herein, we propose a multiple-targeted graphene oxide (GO) nanocarrier that can simultaneously detect and image different type mRNAs in living cells. First of all, in vitro detection of multiple targets have been realized successfully based on the multiple-targeted GO nanocarrier with linear relationship ranging from 3 nM to 200 nM, as well as sensitive detection limit of 1...
August 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28810193/kinetics-and-mechanism-of-antibacterial-activity-and-cytotoxicity-of-ag-rgo-nanocomposite
#18
Marjan Moghayedi, Elaheh K Goharshadi, Kiarash Ghazvini, Hossein Ahmadzadeh, Laleh Ranjbaran, Raheleh Masoudi, Ralf Ludwig
Nowadays, nanomaterials with remarkable antibacterial activity and low cytotoxicity attract much interest in research. By considering the antibacterial activity of Ag and graphene oxide (GO), the Ag-RGO nanocomposite was prepared by a one-pot and facile technique and it was used to evaluate its antibacterial activity and cytotoxicity against Escherichia coli and glioblastoma cancer cells (U87MG), respectively. The antibacterial activity was studied by micro-dilution and colony counting methods to investigate cell viability...
August 4, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28806615/graphene-gold-based-nanocomposites-applications-in-cancer-diseases-efficient-detection-and-therapeutic-tools
#19
REVIEW
Lina A Al-Ani, Mohammed A AlSaadi, Farkaad A Kadir, Najihah M Hashim, Nurhidayatullaili M Julkapli, Wageeh A Yehye
Early detection and efficient treatment of cancer disease remains a drastic challenge in 21st century. Throughout the bulk of funds, studies, and current therapeutics, cancer seems to aggressively advance with drug resistance strains and recurrence rates. Nevertheless, nanotechnologies have indeed given hope to be the next generation for oncology applications. According to US National cancer institute, it is anticipated to revolutionize the perspectives of cancer diagnosis and therapy. With such success, nano-hybrid strategy creates a marvelous preference...
July 28, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28802177/dna-biosensors-based-on-gold-nanoparticles-modified-graphene-oxide-for-the-detection-of-breast-cancer-biomarkers-for-early-diagnosis
#20
Ayman Ali Saeed, Josep Lluís Acero Sánchez, Ciara K O'Sullivan, Mohammed Nooredeen Abbas
Two different DNA (ERBB2c and CD24c) modified gold nanoparticles and graphene oxide loaded on glassy carbon electrodes were prepared for early detection of breast cancer markers by electrochemical detection of HER2. Comparative study of ERBB2c and CD24c for the detection was carried out. A "sandwich-type" detection strategy was employed in this electrochemical DNA biosensor and its response was measured by amperometric detection. The electrochemical signal enhancement achieved via gold nanoparticles and grapheme oxide system allowed for sensitive detection of the breast cancer biomarker ERBB2 and the control marker CD24...
July 14, 2017: Bioelectrochemistry
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