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Mamidi N, Velasco Delgadillo RM, Gonzáles Ortiz A, Barrera EV. Carbon Nano-Onions Reinforced Multilayered Thin Film System for Stimuli-Responsive Drug Release. Pharmaceutics 2020; 12:E1208. [PMID: 33322120 PMCID: PMC7764530 DOI: 10.3390/pharmaceutics12121208] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/09/2020] [Accepted: 12/09/2020] [Indexed: 01/15/2023] Open
Abstract
Herein, poly (N-(4-aminophenyl) methacrylamide))-carbon nano-onions (PAPMA-CNOs = f-CNOs) and anilinated-poly (ether ether ketone) (AN-PEEK) have synthesized, and AN-PEEK/f-CNOs composite thin films were primed via layer-by-layer (LbL) self-assembly for stimuli-responsive drug release. The obtained thin films exhibited pH-responsive drug release in a controlled manner; pH 4.5 = 99.2% and pH 6.5 = 59.3% of doxorubicin (DOX) release was observed over 15 days. Supramolecular π-π stacking interactions between f-CNOs and DOX played a critical role in controlling drug release from thin films. Cell viability was studied with human osteoblast cells and augmented viability was perceived. Moreover, the thin films presented 891.4 ± 8.2 MPa of the tensile strength (σult), 43.2 ± 1.1 GPa of Young's modulus (E), and 164.5 ± 1.7 Jg-1 of toughness (K). Quantitative scrutiny revealed that the well-ordered aligned nanofibers provide critical interphase, and this could be responsible for augmented tensile properties. Nonetheless, a pH-responsive and mechanically robust biocompatible thin-film system may show potential applications in the biomedical field.
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Affiliation(s)
- Narsimha Mamidi
- Department of Chemistry and Nanotechnology, School of Engineering and Sciences, Tecnologico de Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey NL-64849, Mexico; (R.M.V.D.); (A.G.O.)
| | - Ramiro Manuel Velasco Delgadillo
- Department of Chemistry and Nanotechnology, School of Engineering and Sciences, Tecnologico de Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey NL-64849, Mexico; (R.M.V.D.); (A.G.O.)
| | - Aldo Gonzáles Ortiz
- Department of Chemistry and Nanotechnology, School of Engineering and Sciences, Tecnologico de Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey NL-64849, Mexico; (R.M.V.D.); (A.G.O.)
| | - Enrique V. Barrera
- Department of Materials Science and Nanoengineering, Rice University, Houston, TX 77005, USA;
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Mamidi N, González-Ortiz A, Lopez Romo I, V. Barrera E. Development of Functionalized Carbon Nano-Onions Reinforced Zein Protein Hydrogel Interfaces for Controlled Drug Release. Pharmaceutics 2019; 11:E621. [PMID: 31757093 PMCID: PMC6956117 DOI: 10.3390/pharmaceutics11120621] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/08/2019] [Accepted: 11/11/2019] [Indexed: 12/16/2022] Open
Abstract
In the current study, poly 4-mercaptophenyl methacrylate-carbon nano-onions (PMPMA-CNOs = f-CNOs) reinforced natural protein (zein) composites (zein/f-CNOs) are fabricated using the acoustic cavitation technique. The influence of f-CNOs inclusion on the microstructural properties, morphology, mechanical, cytocompatibility, in-vitro degradation, and swelling behavior of the hydrogels are studied. The tensile results showed that zein/f-CNOs hydrogels fabricated by the acoustic cavitation system exhibited good tensile strength (90.18 MPa), compared with the hydrogels fabricated by the traditional method and only microwave radiation method. It reveals the magnitude of physisorption and degree of colloidal stability of f-CNOs within the zein matrix under acoustic cavitation conditions. The swelling behaviors of hydrogels were also tested and improved results were noticed. The cytotoxicity of hydrogels was tested with osteoblast cells. The results showed good cell viability and cell growth. To explore the efficacy of hydrogels as drug transporters, 5-fluorouracil (5-FU) release was measured under gastric and intestinal pH environment. The results showed pH-responsive sustained drug release over 15 days of study, and pH 7.4 showed a more rapid drug release than pH 2.0 and 4.5. Nonetheless, all the results suggest that zein/f-CNOs hydrogel could be a potential pH-responsive drug transporter for a colon-selective delivery system.
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Affiliation(s)
- Narsimha Mamidi
- Tecnologico de Monterrey, Department of Chemistry and Nanotechnology, School of Engineering and Science, Monterrey 64849, Nuevo Leon, Mexico;
| | - Aldo González-Ortiz
- Tecnologico de Monterrey, Department of Chemistry and Nanotechnology, School of Engineering and Science, Monterrey 64849, Nuevo Leon, Mexico;
| | - Irasema Lopez Romo
- Tecnologico de Monterrey, Department of Biotechnology, School of Engineering and Science, Monterrey 64849, Nuevo Leon, Mexico;
| | - Enrique V. Barrera
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77005, USA;
- Department of Chemistry, Rice University, Houston, TX 77005, USA
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Soto M, Vajtai R, Ajayan PM, Barrera EV. Carbon nanotube conditioning part 1-effect of interwall interaction on the electronic band gap of double-walled carbon nanotubes. Nanotechnology 2018; 29:045701. [PMID: 29199975 DOI: 10.1088/1361-6528/aa9f05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ab initio density functional theory simulations were used to calculate the electronic structure and the total energy of double-walled carbon nanotubes (DWCNTs). The relaxed configurations studied were uncapped, infinitely-long zigzag@zigzag double-walled carbon nanotubes. The lowest energy configuration was found to correspond to an interwall distance of 0.35 nm, except for the configurations with inner tube chiral indices (5,0), (6,0) and (7,0). The largest binding energies were found to correspond to a 0.35 nm interwall distance for all the DWCNT configurations studied, and increasing with DWCNT average diameter. In terms of the effect of the interwall interaction on the electronic band gap of DWCNTs, four regions of band gap were obtained which were termed: zero band gap, narrow band gap, small band gap, and medium band gap regions. These regions offer the possibility to first tune the electronic band gap to a region with a desired range, and further tune that choice within the region itself by varying the interwall distance. It was also found that zigzag@zigzag DWCNTs with outer tube leading chiral index n = 3k + 1 or n = 3k + 2 (k being an integer) follow, as a general trend, an inversely proportional relation of the electronic band gap with respect to the average diameter.
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Affiliation(s)
- M Soto
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77005, United States of America
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Mamidi N, Leija HM, Diabb JM, Lopez Romo I, Hernandez D, Castrejón JV, Martinez Romero O, Barrera EV, Elias Zúñiga A. Cytotoxicity evaluation of unfunctionalized multiwall carbon nanotubes-ultrahigh molecular weight polyethylene nanocomposites. J Biomed Mater Res A 2017; 105:3042-3049. [DOI: 10.1002/jbm.a.36168] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 06/20/2017] [Accepted: 08/01/2017] [Indexed: 01/01/2023]
Affiliation(s)
- Narsimha Mamidi
- Tecnologico de Monterrey; Departamento de Ingeniería Biomédica, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León, México
| | - Héctor Manuel Leija
- Tecnologico de Monterrey; Departamento de Ingeniería Biomédica, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León, México
| | - Jose Manuel Diabb
- Tecnologico de Monterrey; Departamento de Ingeniería Biomédica, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León, México
| | - Irasema Lopez Romo
- Tecnologico de Monterrey, Departamento de Biotecnología FEMSA, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León, México
| | - Diana Hernandez
- Tecnologico de Monterrey, Departamento de Biotecnología FEMSA, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León, México
| | - Javier Villela Castrejón
- Tecnologico de Monterrey, Departamento de Biotecnología FEMSA, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León, México
| | - Oscar Martinez Romero
- Tecnologico de Monterrey; Departamento de Ingeniería Biomédica, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León, México
| | - Enrique V. Barrera
- Department of Materials Science and NanoEngineering; Rice University; Houston Texas 77005
- Department of Chemistry; Rice University; Houston Texas 77005
- Distinguished Visiting Professor; Tecnológico de Monterrey, Departamento de Ingeniería Biomédica, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León México
| | - Alex Elias Zúñiga
- Tecnologico de Monterrey; Departamento de Ingeniería Biomédica, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849; Monterrey Nuevo León, México
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Abstract
This work is aimed at assessing the sensitivity of carbon nanotube (CNT) thermal conductivity to physical and numerical parameters owing to its wide variation in the literature. CNTs of various lengths, chiralities, and temperatures are simulated with molecular dynamics. The Tersoff and AIREBO potentials are also compared in this study. Thermal conductivity is computed with two different non-equilibrium molecular dynamics (NEMD) methods, which show interestingly divergent results; exploring the CNT phonon density of states reveals a proximate cause for the differences.
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Affiliation(s)
- J W Lee
- Department of Mechanical Engineering and Materials Science, Rice University, Houston, USA
| | - A J Meade
- Department of Mechanical Engineering and Materials Science, Rice University, Houston, USA
| | - E V Barrera
- Department of Mechanical Engineering and Materials Science, Rice University, Houston, USA
| | - J A Templeton
- Thermal/Fluid Science and Engineering, Sandia National Laboratories, Livermore, USA
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Ozden S, Machado LD, Tiwary C, Autreto PAS, Vajtai R, Barrera EV, Galvao DS, Ajayan PM. Ballistic Fracturing of Carbon Nanotubes. ACS Appl Mater Interfaces 2016; 8:24819-24825. [PMID: 27564421 DOI: 10.1021/acsami.6b07547] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Advanced materials with multifunctional capabilities and high resistance to hypervelocity impact are of great interest to the designers of aerospace structures. Carbon nanotubes (CNTs) with their lightweight and high strength properties are alternative to metals and/or metallic alloys conventionally used in aerospace applications. Here we report a detailed study on the ballistic fracturing of CNTs for different velocity ranges. Our results show that the highly energetic impacts cause bond breakage and carbon atom rehybridizations, and sometimes extensive structural reconstructions were also observed. Experimental observations show the formation of nanoribbons, nanodiamonds, and covalently interconnected nanostructures, depending on impact conditions. Fully atomistic reactive molecular dynamics simulations were also carried out in order to gain further insights into the mechanism behind the transformation of CNTs. The simulations show that the velocity and relative orientation of the multiple colliding nanotubes are critical to determine the impact outcome.
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Affiliation(s)
- Sehmus Ozden
- Department of Material Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Leonardo D Machado
- Applied Physics Department, State University of Campinas , Campinas, São Paulo 13083-959, Brazil
- Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte , Natal, Rio Grande do Norte 59072-970, Brazil
| | - ChandraSekhar Tiwary
- Department of Material Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Pedro A S Autreto
- Applied Physics Department, State University of Campinas , Campinas, São Paulo 13083-959, Brazil
- Universidade Federal do ABC , Santo André, São Paulo 09210-580, Brazil
| | - Robert Vajtai
- Department of Material Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Enrique V Barrera
- Department of Material Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
| | - Douglas S Galvao
- Applied Physics Department, State University of Campinas , Campinas, São Paulo 13083-959, Brazil
| | - Pulickel M Ajayan
- Department of Material Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
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Machado LD, Ozden S, Tiwary C, Autreto PAS, Vajtai R, Barrera EV, Galvao DS, Ajayan PM. The structural and dynamical aspects of boron nitride nanotubes under high velocity impacts. Phys Chem Chem Phys 2016; 18:14776-81. [PMID: 27189765 DOI: 10.1039/c6cp01949h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This communication report is a study on the structural and dynamical aspects of boron nitride nanotubes (BNNTs) shot at high velocities (∼5 km s−1) against solid targets.
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Affiliation(s)
- Leonardo D. Machado
- Department of Material Science and NanoEngineering
- Rice University
- Houston
- USA
- Departamento de Física Teórica e Experimental
| | - Sehmus Ozden
- Department of Material Science and NanoEngineering
- Rice University
- Houston
- USA
| | | | | | - Robert Vajtai
- Department of Material Science and NanoEngineering
- Rice University
- Houston
- USA
| | - Enrique V. Barrera
- Department of Material Science and NanoEngineering
- Rice University
- Houston
- USA
| | - Douglas S. Galvao
- Applied Physics Department
- State University of Campinas
- Campinas-SP
- Brazil
| | - Pulickel M. Ajayan
- Department of Material Science and NanoEngineering
- Rice University
- Houston
- USA
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Soto M, Boyer TA, Biradar S, Ge L, Vajtai R, Elías-Zúñiga A, Ajayan PM, Barrera EV. Effect of interwall interaction on the electronic structure of double-walled carbon nanotubes. Nanotechnology 2015; 26:165201. [PMID: 25816374 DOI: 10.1088/0957-4484/26/16/165201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Through this study, the results of density functional theory calculations within the local density approximation of the electronic structure of zigzag-zigzag double-walled carbon nanotubes (DWCNTs), with chiral indices (n, 0)@(m, 0) for n = 7-15, and m = 15-26, has been presented and the effects of interwall interaction and orbital hybridization on the electronic structure of these systems has been discussed. It was observed that the electronic band gap of the aforementioned DWCNTs depends on the interwall distance only for metallic-semiconductor configurations and on the intrinsic properties of the constituent tubes in all other combinations. It was also observed that the calculated band gap for most of the metallic-metallic DWCNTs was smaller than semiconductor-metallic, metallic-semiconductor, and semiconductor-semiconductor configurations. Metallic-semiconductor DWCNTs were found to be desirable for band gap tuning applications because of their dependence on interwall distance, opening up the possibility of using such systems in electronic device applications, such as transistors. Other applications include the use of DWCNTs in macroscopic carbon nanotube conducting wires, for which metallic-metallic and semiconducting-metallic zigzag-zigzag DWCNTs were found to be the most desirable configurations due to their small band gaps.
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Affiliation(s)
- M Soto
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77005, USA
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Ozden S, Autreto PAS, Tiwary CS, Khatiwada S, Machado L, Galvao DS, Vajtai R, Barrera EV, Ajayan PM. Unzipping carbon nanotubes at high impact. Nano Lett 2014; 14:4131-4137. [PMID: 24915176 DOI: 10.1021/nl501753n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The way nanostructures behave and mechanically respond to high impact collision is a topic of intrigue. For anisotropic nanostructures, such as carbon nanotubes, this response will be complicated based on the impact geometry. Here we report the result of hypervelocity impact of nanotubes against solid targets and show that impact produces a large number of defects in the nanotubes, as well as rapid atom evaporation, leading to their unzipping along the nanotube axis. Fully atomistic reactive molecular dynamics simulations are used to gain further insights of the pathways and deformation and fracture mechanisms of nanotubes under high energy mechanical impact. Carbon nanotubes have been unzipped into graphene nanoribbons before using chemical treatments but here the instability of nanotubes against defect formation, fracture, and unzipping is revealed purely through mechanical impact.
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Affiliation(s)
- Sehmus Ozden
- Department of Material Science and NanoEngineering, Rice University , Houston, Texas 77005, United States
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Zhao Y, Wei J, Vajtai R, Ajayan PM, Barrera EV. Iodine doped carbon nanotube cables exceeding specific electrical conductivity of metals. Sci Rep 2011; 1:83. [PMID: 22355602 PMCID: PMC3216570 DOI: 10.1038/srep00083] [Citation(s) in RCA: 280] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Accepted: 08/15/2011] [Indexed: 11/24/2022] Open
Abstract
Creating highly electrically conducting cables from macroscopic aggregates of carbon nanotubes, to replace metallic wires, is still a dream. Here we report the fabrication of iodine-doped, double-walled nanotube cables having electrical resistivity reaching ∼10−7 Ω.m. Due to the low density, their specific conductivity (conductivity/weight) is higher than copper and aluminum and is only just below that of the highest specific conductivity metal, sodium. The cables exhibit high current-carrying capacity of 104∼105 A/cm2 and can be joined together into arbitrary length and diameter, without degradation of their electrical properties. The application of such nanotube cables is demonstrated by partly replacing metal wires in a household light bulb circuit. The conductivity variation as a function of temperature for the cables is five times smaller than that for copper. The high conductivity nanotube cables could find a range of applications, from low dimensional interconnects to transmission lines.
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Affiliation(s)
- Yao Zhao
- Department of Mechanical Engineering and Materials Science, Rice University, Houston, USA
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Sarkar S, Sharma C, Yog R, Periakaruppan A, Jejelowo O, Thomas R, Barrera EV, Rice-Ficht AC, Wilson BL, Ramesh GT. Analysis of stress responsive genes induced by single-walled carbon nanotubes in BJ Foreskin cells. J Nanosci Nanotechnol 2007; 7:584-92. [PMID: 17450800 PMCID: PMC2758086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Nanotechnology is finding its use as a potential technology in consumer products, defense, electronics, and medical applications by exploiting the properties of nanomaterials. Single-walled carbon nanotubes are novel forms of these nanomaterials with potential for large applications. However, the toxicity studies on this material are not explored in detail and therefore limiting its use. It has been earlier reported that single-walled carbon nanotubes induces oxidative stress and also dictates activation of specific signaling pathway in keratinocytes. The present study explores the effect of single-walled carbon nanotubes on stress genes in human BJ Foreskin cells. The results show induction of oxidative stress in BJ Foreskin cells by single-walled carbon nanotubes and increase in stress responsive genes. The genes included inducible genes like HMOX1, HMOX2, and Cyp1B1. In addition we validated increase for four genes by SWCNT, namely ATM, CCNC, DNAJB4, and GADD45A by RT-PCR. Moreover results of the altered stress related genes have been discussed and that partially explains some of the toxic responses induced by single-walled carbon nanotubes.
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Affiliation(s)
- Shubhashish Sarkar
- Molecular Neurotoxicology Laboratory/Proteomics Core, Department of Biology, Texas Southern University, Houston, TX 77004, USA
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Manna SK, Sarkar S, Barr J, Wise K, Barrera EV, Jejelowo O, Rice-Ficht AC, Ramesh GT. Single-walled carbon nanotube induces oxidative stress and activates nuclear transcription factor-kappaB in human keratinocytes. Nano Lett 2005; 5:1676-84. [PMID: 16159204 PMCID: PMC2743875 DOI: 10.1021/nl0507966] [Citation(s) in RCA: 271] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Carbon nanotubes are now becoming an important material for use in day to day life because of their unique physical properties. The toxicological impact of these materials has not yet been studied in detail, thereby limiting their use. In the present study, the toxicity of single-walled carbon nanotubes (SWCNT) was assessed in human keratinocyte cells. The results show increased oxidative stress and inhibition of cell proliferation in response to treatment of keratinocytes with SWCNT particles. In addition, the signaling mechanism in keratinocytes upon exposure to SWCNT particles was investigated. Results from the study suggest that SWCNT particles activate NF-kappaB in a dose-dependent manner in human keratinocytes. Further, the mechanism of activation of NF-kappaB was due to the activation of stress-related kinases by SWCNT particles in keratinocytes. In conclusion, these studies show the mechanism of toxicity induced by SWCNT particles.
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Affiliation(s)
| | | | | | | | | | | | | | - Govindarajan T. Ramesh
- Corresponding author: Dr. G. T. Ramesh, Assistant Professor, Department of Biology, Texas Southern University, 3100 Cleburne St, Houston, TX 77004. Tel: 713 313-7784. Fax: 713 313-7932.
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Heald SM, Barrera EV, Chen H. Glancing angle XAFS and X-ray reflectivity studies of transition-metal/aluminium interfaces. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/dc9908900021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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