151
|
Da Ros T, Ostric A, Andreola F, Filocamo M, Pietrogrande M, Corsolini F, Stroppiano M, Bruni S, Serafino A, Fiorito S. Carbon nanotubes as nanovectors for intracellular delivery of laronidase in Mucopolysaccharidosis type I. NANOSCALE 2018; 10:657-665. [PMID: 29239447 DOI: 10.1039/c7nr07393c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The immobilization of proteins on carbon nanotubes (CNTs) has been widely reported mainly for the preparation of sensors while the conjugation of enzymes for therapeutic purposes has scarcely been considered. Herein we report, to the best of our knowledge, the first example of intracellular delivery of a therapeutic enzyme by means of CNTs, retaining its activity. Mucopolysaccharidosis I is a rare genetic disease characterized by the deficiency or absence of the activity of the α-l-iduronidase (IDUA) enzyme. We evaluated the capacity of the recombinant form of the human IDUA enzyme, laronidase (Aldurazyme®), conjugated with CNTs to be internalized by fibroblasts from subjects affected with Mucopolysaccharidosis type I and the capacity of the enzyme to retain its activity after internalization. The enzyme was successfully delivered into the lysosomal space and the enzymatic activity of the conjugate was preserved after internalization up to 48 hours. This paves the way towards the use of such a kind of construct for therapeutic applications.
Collapse
Affiliation(s)
- T Da Ros
- INSTM unit of Trieste, Department of Chemical and Pharmaceutical Sciences, University of Trieste, Piazzale Europa 1, 34127 Trieste, Italy.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
152
|
Díaz-Ayala R, Torres-González L, Pietri R, Cabrera CR, López-Garriga J. Engineered (Lys) 6-Tagged Recombinant Sulfide-Reactive Hemoglobin I for Covalent Immobilization at Multiwalled Carbon Nanotubes. ACS OMEGA 2017; 2:9021-9032. [PMID: 29302632 PMCID: PMC5748273 DOI: 10.1021/acsomega.7b01500] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 12/01/2017] [Indexed: 06/07/2023]
Abstract
The recombinant HbI was fused with a poly-Lys tag ((Lys)6-tagged rHbI) for specific-site covalent immobilization on two carbon nanotube transducer surfaces, i.e., powder and vertically aligned carbon nanotubes. The immobilization was achieved by following two steps: (1) generation of amine-reactive ester from the carboxylic acid groups of the surfaces and (2) coupling these groups with the amine groups of the Lys-tag. We analyzed the immobilization process using different conditions and techniques to differentiate protein covalent attachment from physical adsorption. Fourier transform infrared microspectroscopy data showed a 14 cm-1 displacement of the protein's amide I and amide II peaks to lower the frequency after immobilization. This result indicates a covalent attachment of the protein to the surface. Differences in the morphology of the carbon substrate with and without (Lys)6-tagged rHbI confirmed protein immobilization, as observed by transmission electron microscopy. The electrochemical studies, which were performed to evaluate the redox center of the immobilized protein, show a confinement suitable for an efficient electron transfer system. More importantly, the electrochemical studies allowed determination of a redox potential for the new (Lys)6-tagged rHbI. The data show that the protein is electrochemically active and retains its biological activity toward H2S.
Collapse
Affiliation(s)
- Ramonita Díaz-Ayala
- Department
of Chemistry, P.O. Box 9000, University
of Puerto Rico—Mayagüez Campus, Mayaguez 00680-9000, Puerto Rico
| | - Lisa Torres-González
- Department
of Chemistry, P.O. Box 9000, University
of Puerto Rico—Mayagüez Campus, Mayaguez 00680-9000, Puerto Rico
| | - Ruth Pietri
- Department
of Chemistry, P.O. Box 372230, University
of Puerto Rico—Cayey Campus, Cayey 00737-2230, Puerto
Rico
| | - Carlos R. Cabrera
- Department
of Chemistry, P.O. Box 23346, University
of Puerto Rico—Río Piedras Campus, San Juan 00931-3346, Puerto Rico
| | - Juan López-Garriga
- Department
of Chemistry, P.O. Box 9000, University
of Puerto Rico—Mayagüez Campus, Mayaguez 00680-9000, Puerto Rico
| |
Collapse
|
153
|
Homaei A, Samari F. Investigation of activity and stability of papain by adsorption on multi-wall carbon nanotubes. Int J Biol Macromol 2017; 105:1630-1635. [DOI: 10.1016/j.ijbiomac.2017.02.038] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 02/02/2017] [Accepted: 02/09/2017] [Indexed: 10/20/2022]
|
154
|
Immobilization of β -galactosidase on surface modified cobalt/multiwalled carbon nanotube nanocomposite improves enzyme stability and resistance to inhibitor. Int J Biol Macromol 2017; 105:693-701. [DOI: 10.1016/j.ijbiomac.2017.07.088] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 07/04/2017] [Accepted: 07/13/2017] [Indexed: 11/18/2022]
|
155
|
Flotation Assembly of Large-Area Ultrathin MWCNT Nanofilms for Construction of Bioelectrodes. NANOMATERIALS 2017; 7:nano7100342. [PMID: 29065460 PMCID: PMC5666507 DOI: 10.3390/nano7100342] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 10/18/2017] [Accepted: 10/19/2017] [Indexed: 11/30/2022]
Abstract
We report a simple, versatile, and rapid method for the fabrication of optically-transparent large-area carbon nanotube (CNT) films via flotation assembly. After solvent-induced assembly, floating films were transferred to a flat supporting substrate to form conductive and transparent CNT film electrodes. The resulting electrodes, with uniform 40 ± 20 nm multi-walled CNT (MWCNT) layers, were characterized by electrochemical and microscopy methods. The flotation method does not require specialized thin-film instrumentation and avoids the need for surfactants and pre-oxidized CNTs which can hamper electrochemical performance. A proof-of-concept nanostructured bioelectrode demonstrating high sensitivity for glucose was developed with an electropolymerized poly(pyrene-adamantane) layer for host–guest immobilization of active β-cyclodextrin tagged GOx enzymes. The polymer provides pyrene groups for cross-linking to CNTs and pendant adamantane groups for binding the β-cyclodextrin groups of the tagged enzyme. This demonstration offers a new approach for the preparation of stable and transparent CNT film electrodes with attractive electrochemical properties towards future photobio- and bio-electrochemical fuel cells, electrochemical sensors, and electroanalysis.
Collapse
|
156
|
Al-Jumaili A, Alancherry S, Bazaka K, Jacob MV. Review on the Antimicrobial Properties of Carbon Nanostructures. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E1066. [PMID: 28892011 PMCID: PMC5615720 DOI: 10.3390/ma10091066] [Citation(s) in RCA: 179] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 09/04/2017] [Accepted: 09/06/2017] [Indexed: 01/08/2023]
Abstract
Swift developments in nanotechnology have prominently encouraged innovative discoveries across many fields. Carbon-based nanomaterials have emerged as promising platforms for a broad range of applications due to their unique mechanical, electronic, and biological properties. Carbon nanostructures (CNSs) such as fullerene, carbon nanotubes (CNTs), graphene and diamond-like carbon (DLC) have been demonstrated to have potent broad-spectrum antibacterial activities toward pathogens. In order to ensure the safe and effective integration of these structures as antibacterial agents into biomaterials, the specific mechanisms that govern the antibacterial activity of CNSs need to be understood, yet it is challenging to decouple individual and synergistic contributions of physical, chemical and electrical effects of CNSs on cells. In this article, recent progress in this area is reviewed, with a focus on the interaction between different families of carbon nanostructures and microorganisms to evaluate their bactericidal performance.
Collapse
Affiliation(s)
- Ahmed Al-Jumaili
- Electronics Materials Lab, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia.
| | - Surjith Alancherry
- Electronics Materials Lab, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia.
| | - Kateryna Bazaka
- Electronics Materials Lab, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia.
- School of Chemistry, Physics, Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Mohan V Jacob
- Electronics Materials Lab, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia.
| |
Collapse
|
157
|
Nii D, Miyachi M, Shimada Y, Nozawa Y, Ito M, Homma Y, Ikehira S, Yamanoi Y, Nishihara H, Tomo T. Conjugates between photosystem I and a carbon nanotube for a photoresponse device. PHOTOSYNTHESIS RESEARCH 2017; 133:155-162. [PMID: 27864658 DOI: 10.1007/s11120-016-0324-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 11/10/2016] [Indexed: 06/06/2023]
Abstract
Photosystem I (PS I) is a large pigment-protein complex embedded in the thylakoid membranes that performs light-driven electron transfer across the thylakoid membrane. Carbon nanotubes exhibit excellent electrical conductivities and excellent strength and stiffness. In this study, we generated PSI-carbon nanotube conjugates dispersed in a solution aimed at application in artificial photosynthesis. PS I complexes in which a carbon nanotube binding peptide was introduced into the middle of the PsaE subunit were conjugated on a single-walled carbon nanotube, orienting the electron acceptor side to the nanotube. Spectral and photoluminescence analysis showed that the PS I is bound to a single-walled carbon nanotube, which was confirmed by transmission electron microscopy. Photocurrent observation proved that the photoexcited electron originated from PSI and transferred to the carbon nanotube with light irradiation, which also confirmed its orientated conjugation. The PS I-carbon nanotube conjugate will be a useful nano-optoelectronic device for the development of artificial systems.
Collapse
Affiliation(s)
- Daisuke Nii
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yuichiro Shimada
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Yosuke Nozawa
- Department of Physics, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Masahiro Ito
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Yoshikazu Homma
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Shu Ikehira
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tatsuya Tomo
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan.
| |
Collapse
|
158
|
Exceptional release kinetics and cytotoxic selectivity of oxidised MWCNTs double-functionalised with doxorubicin and prostate-homing peptide. Colloids Surf B Biointerfaces 2017; 156:123-132. [DOI: 10.1016/j.colsurfb.2017.05.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 04/06/2017] [Accepted: 05/03/2017] [Indexed: 11/21/2022]
|
159
|
The Utilization of Multiple-Walled Carbon Nanotubes in Polymer Modified Bitumen. MATERIALS 2017; 10:ma10040416. [PMID: 28772775 PMCID: PMC5506968 DOI: 10.3390/ma10040416] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 04/11/2017] [Accepted: 04/12/2017] [Indexed: 11/17/2022]
Abstract
SBS (styrene-butadiene-styrene block copolymer) modified bitumen is one of most widely used polymer modified bitumens in China. It is also not satisfactory when subjected to extreme conditions. Multiple-walled carbon nanotubes, as a type of advanced nanomaterial, are investigated extensively because of their strong adsorption capacity. Little research has been done about MWCNTs/SBS modified bitumen, and in view of this, the performance and modification mechanism of MWCNTs/SBS modified bitumen was investigated in this paper. Conventional bitumen tests, Brookfield viscosity, bending beam rheometer, and dynamic shear rheometer tests showed improved performance at high and low temperature. The optimum MWCNTs content was determined as 1.0%. FT-IR, bitumen four components, and thermal analysis tests were conducted and revealed that the addition of MWCNTs led to a decrease in the content of light components. In addition, the rate of decomposition and volatilization of saturates and aromatics was reduced and better thermal stability of bitumen was found. Fluorescence microscopy tests showed that MWCNTs improved the dispersion of SBS and storage stability of the binder. Finally a schematic was proposed to explain how MWCNTs improved the performance of SBS modified bitumen through their strong adsorption property created by π-π intermolecular forces.
Collapse
|
160
|
Antonucci A, Kupis-Rozmysłowicz J, Boghossian AA. Noncovalent Protein and Peptide Functionalization of Single-Walled Carbon Nanotubes for Biodelivery and Optical Sensing Applications. ACS APPLIED MATERIALS & INTERFACES 2017; 9:11321-11331. [PMID: 28299937 DOI: 10.1021/acsami.7b00810] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The exquisite structural and optical characteristics of single-walled carbon nanotubes (SWCNTs), combined with the tunable specificities of proteins and peptides, can be exploited to strongly benefit technologies with applications in fields ranging from biomedicine to industrial biocatalysis. The key to exploiting the synergism of these materials is designing protein/peptide-SWCNT conjugation schemes that preserve biomolecule activity while keeping the near-infrared optical and electronic properties of SWCNTs intact. Since sp2 bond-breaking disrupts the optoelectronic properties of SWCNTs, noncovalent conjugation strategies are needed to interface biomolecules to the nanotube surface for optical biosensing and delivery applications. An underlying understanding of the forces contributing to protein and peptide interaction with the nanotube is thus necessary to identify the appropriate conjugation design rules for specific applications. This article explores the molecular interactions that govern the adsorption of peptides and proteins on SWCNT surfaces, elucidating contributions from individual amino acids as well as secondary and tertiary protein structure and conformation. Various noncovalent conjugation strategies for immobilizing peptides, homopolypeptides, and soluble and membrane proteins on SWCNT surfaces are presented, highlighting studies focused on developing near-infrared optical sensors and molecular scaffolds for self-assembly and biochemical analysis. The analysis presented herein suggests that though direct adsorption of proteins and peptides onto SWCNTs can be principally applied to drug and gene delivery, in vivo imaging and targeting, or cancer therapy, nondirect conjugation strategies using artificial or natural membranes, polymers, or linker molecules are often better suited for biosensing applications that require conservation of biomolecular functionality or precise control of the biomolecule's orientation. These design rules are intended to provide the reader with a rational approach to engineering biomolecule-SWCNT platforms, broadening the breadth and accessibility of both wild-type and engineered biomolecules for SWCNT-based applications.
Collapse
Affiliation(s)
- Alessandra Antonucci
- Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL) , 1015-Lausanne, Switzerland
| | - Justyna Kupis-Rozmysłowicz
- Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL) , 1015-Lausanne, Switzerland
| | - Ardemis A Boghossian
- Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL) , 1015-Lausanne, Switzerland
| |
Collapse
|
161
|
Ho K, Teow Y, Ang W, Mohammad A. Novel GO/OMWCNTs mixed-matrix membrane with enhanced antifouling property for palm oil mill effluent treatment. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.01.014] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
|
162
|
Gong Y, Adhikari P, Liu Q, Wang T, Gong M, Chan WL, Ching WY, Wu J. Designing the Interface of Carbon Nanotube/Biomaterials for High-Performance Ultra-Broadband Photodetection. ACS APPLIED MATERIALS & INTERFACES 2017; 9:11016-11024. [PMID: 28263551 DOI: 10.1021/acsami.7b00352] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Inorganic/biomolecule nanohybrids can combine superior electronic and optical properties of inorganic nanostructures and biomolecules for optoelectronics with performance far surpassing that achievable in conventional materials. The key toward a high-performance inorganic/biomolecule nanohybrid is to design their interface based on the electronic structures of the constituents. A major challenge is the lack of knowledge of most biomolecules due to their complex structures and composition. Here, we first calculated the electronic structure and optical properties of one of the cytochrome c (Cyt c) macromolecules (PDB ID: 1HRC ) using ab initio OLCAO method, which was followed by experimental confirmation using ultraviolet photoemission spectroscopy. For the first time, the highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels of Cyt c, a well-known electron transport chain in biological systems, were obtained. On the basis of the result, pairing the Cyt c with semiconductor single-wall carbon nanotubes (s-SWCNT) was predicted to have a favorable band alignment and built-in electrical field for exciton dissociation and charge transfer across the s-SWCNT/Cyt c heterojunction interface. Excitingly, photodetectors based on the s-SWCNT/Cyt c heterojunction nanohybrids demonstrated extraordinary ultra-broadband (visible light to infrared) responsivity (46-188 A W-1) and figure-of-merit detectivity D* (1-6 × 1010 cm Hz1/2 W-1). Moreover, these devices can be fabricated on transparent flexible substrates by a low-lost nonvacuum method and are stable in air. These results suggest that the s-SWCNT/biomolecule nanohybrids may be promising for the development of CNT-based ultra-broadband photodetectors.
Collapse
Affiliation(s)
- Youpin Gong
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
- College of Physics, Optoelectronics and Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province, and Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University , Suzhou 215006, China
| | - Puja Adhikari
- Department of Physics and Astronomy, University of Missouri-Kansas City , Kansas City, Missouri 64110, United States
| | - Qingfeng Liu
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
| | - Ti Wang
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
| | - Maogang Gong
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
| | - Wai-Lun Chan
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
| | - Wai-Yim Ching
- Department of Physics and Astronomy, University of Missouri-Kansas City , Kansas City, Missouri 64110, United States
| | - Judy Wu
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
| |
Collapse
|
163
|
Zhu Z. An Overview of Carbon Nanotubes and Graphene for Biosensing Applications. NANO-MICRO LETTERS 2017; 9:25. [PMID: 30393720 PMCID: PMC6199032 DOI: 10.1007/s40820-017-0128-6] [Citation(s) in RCA: 122] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 01/04/2017] [Indexed: 05/15/2023]
Abstract
With the development of carbon nanomaterials in recent years, there has been an explosion of interests in using carbon nanotubes (CNTs) and graphene for developing new biosensors. It is believed that employing CNTs and graphene as sensor components can make sensors more reliable, accurate, and fast due to their remarkable properties. Depending on the types of target molecular, different strategies can be applied to design sensor device. This review article summarized the important progress in developing CNT- and graphene-based electrochemical biosensors, field-effect transistor biosensors, and optical biosensors. Although CNTs and graphene have led to some groundbreaking discoveries, challenges are still remained and the state-of-the-art sensors are far from a practical application. As a conclusion, future effort has to be made through an interdisciplinary platform, including materials science, biology, and electric engineering.
Collapse
Affiliation(s)
- Zanzan Zhu
- National Cancer Centre Singapore, 11 Hospital Drive, Singapore, 169610 Singapore
| |
Collapse
|
164
|
Lian X, Fang Y, Joseph E, Wang Q, Li J, Banerjee S, Lollar C, Wang X, Zhou HC. Enzyme–MOF (metal–organic framework) composites. Chem Soc Rev 2017; 46:3386-3401. [DOI: 10.1039/c7cs00058h] [Citation(s) in RCA: 791] [Impact Index Per Article: 113.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review summarizes the syntheses and applications of metal–organic framework (MOF)–enzyme composites with specific emphasis on the merits MOFs bring to the immobilized enzymes.
Collapse
Affiliation(s)
- Xizhen Lian
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | - Yu Fang
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | | | - Qi Wang
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | - Jialuo Li
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | - Sayan Banerjee
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | | | - Xuan Wang
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | - Hong-Cai Zhou
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| |
Collapse
|
165
|
Lee BM, Hur J. Adsorption Behavior of Extracellular Polymeric Substances on Graphene Materials Explored by Fluorescence Spectroscopy and Two-Dimensional Fourier Transform Infrared Correlation Spectroscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:7364-7372. [PMID: 27348186 DOI: 10.1021/acs.est.6b01286] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Adsorption isotherms of extracellular polymeric substances (EPS) on graphene oxide (GO) and reduced GO (rGO) were studied using fluorescence excitation-emission matrix-parallel factor analysis (EEM-PARAFAC) and two-dimensional correlation spectroscopy (2D-COS) combined with Fourier transform infrared spectroscopy (FTIR). Chemical reduction of GO resulted in a greater extent of carbon adsorption with a higher degree of isotherm nonlinearity, suggesting that heterogeneous adsorption sites were additionally created by GO reduction. Two protein-like and two humic-like components were identified from EPS by EEM-PARAFAC. Adsorption of protein-like components was greater than that of humic-like components, and the preferential adsorption was more pronounced for GO versus rGO. Adsorption of protein-like components was more governed by site-limiting mechanisms than humic-like components as shown by the higher isotherm nonlinearity. 2D-COS provided further information on the adsorption of secondary protein structures. Adsorption of the EPS structures related to amide I and aromatic C-C bands was greater for rGO versus GO. Protein structures of EPS were more favorable for adsorption in the order of α-helix → amide II → β-sheet structures with increasing site limitation. Our results revealed successful applicability of EEM-PARAFAC and 2D-COS in examining the adsorption behavior of heterogeneous biological materials on graphene materials.
Collapse
Affiliation(s)
- Bo-Mi Lee
- Department of Environment and Energy, Sejong University , Seoul, 143-747, South Korea
| | - Jin Hur
- Department of Environment and Energy, Sejong University , Seoul, 143-747, South Korea
| |
Collapse
|
166
|
Boncel S, Herman AP, Budniok S, Jędrysiak RG, Jakóbik-Kolon A, Skepper JN, Müller KH. In Vitro Targeting and Selective Killing of T47D Breast Cancer Cells by Purpurin and 5-Fluorouracil Anchored to Magnetic CNTs: Nitrene-Based Functionalization versus Uptake, Cytotoxicity, and Intracellular Fate. ACS Biomater Sci Eng 2016; 2:1273-1285. [DOI: 10.1021/acsbiomaterials.6b00197] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sławomir Boncel
- Department
of Organic Chemistry, Biochemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, Gliwice 44-100, Poland
| | - Artur P. Herman
- Department
of Organic Chemistry, Biochemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, Gliwice 44-100, Poland
| | - Sebastian Budniok
- Department
of Organic Chemistry, Biochemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, Gliwice 44-100, Poland
| | - Rafał G. Jędrysiak
- Department
of Organic Chemistry, Biochemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, Gliwice 44-100, Poland
| | - Agata Jakóbik-Kolon
- Department
of Inorganic Chemistry, Analytical Chemistry and Electrochemistry,
Faculty of Chemistry, Silesian University of Technology, Krzywoustego
6, Gliwice 44-100, Poland
| | - Jeremy N. Skepper
- Cambridge
Advanced Imaging Centre, Department of Physiology, Development and
Neuroscience, Anatomy Building, University of Cambridge, Downing
Street, Cambridge CB2 3DY, United Kingdom
| | - Karin H. Müller
- Cambridge
Advanced Imaging Centre, Department of Physiology, Development and
Neuroscience, Anatomy Building, University of Cambridge, Downing
Street, Cambridge CB2 3DY, United Kingdom
| |
Collapse
|
167
|
Oliveira SF, da Luz JMR, Kasuya MCM, Ladeira LO, Correa Junior A. Enzymatic extract containing lignin peroxidase immobilized on carbon nanotubes: Potential biocatalyst in dye decolourization. Saudi J Biol Sci 2016; 25:651-659. [PMID: 29740229 PMCID: PMC5936880 DOI: 10.1016/j.sjbs.2016.02.018] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 01/22/2016] [Accepted: 02/11/2016] [Indexed: 12/13/2022] Open
Abstract
The majority of the textile dyes are harmful to the environment and potentially carcinogenic. Among strategies for their exclusion, the treatment of dye contaminated wastewater with fungal extract, containing lignin peroxidase (LiP), may be useful. Two fungi isolates, Pleurotus ostreatus (PLO9) and Ganoderma lucidum (GRM117), produced the enzymatic extract by fermentation in the lignocellulosic residue, Jatropha curcas seed cake. The extracts from PLO9 and GRM117 were immobilized on carbon nanotubes and showed an increase of 18 and 27-fold of LiP specific activity compared to the free enzyme. Also, LiP from both fungi extracts showed higher Vmax and lower Km values. Only the immobilized extracts could be efficiently reused in the dye decolourization, contrary, the carbon nanotubes became saturated and they should be discarded over time. This device may offer a final biocatalyst with higher catalytic efficiency and capability to be reused in the dye decolourization process.
Collapse
Affiliation(s)
- Sabrina Feliciano Oliveira
- Department of Microbiology, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627 - Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - José Maria Rodrigues da Luz
- Department of Microbiology, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n° - Campus Universitário, Viçosa, Minas Gerais, Brazil
| | - Maria Catarina Megumi Kasuya
- Department of Microbiology, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n° - Campus Universitário, Viçosa, Minas Gerais, Brazil
| | - Luiz Orlando Ladeira
- Department of Microbiology, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627 - Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Ary Correa Junior
- Department of Microbiology, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627 - Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| |
Collapse
|
168
|
Prlainović NŽ, Bezbradica DI, Rogan JR, Uskoković PS, Mijin DŽ, Marinković AD. Surface functionalization of oxidized multi-walled carbon nanotubes: Candida rugosa lipase immobilization. CR CHIM 2016. [DOI: 10.1016/j.crci.2015.10.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
169
|
Surface Modification Chemistries of Materials Used in Diagnostic Platforms with Biomolecules. J CHEM-NY 2016. [DOI: 10.1155/2016/9241378] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Biomolecules including DNA, protein, and enzymes are of prime importance in biomedical field. There are several reports on the technologies for the detection of these biomolecules on various diagnostic platforms. It is important to note that the performance of the biosensor is highly dependent on the substrate material used and its meticulous modification for particular applications. Therefore, it is critical to understand the principles of a biosensor to identify the correct substrate material and its surface modification chemistry. The imperative surface modification for the attachment of biomolecules without losing their bioactivity is a key to sensitive detection. Therefore, finding of a modification method which gives minimum damage to the surface as well as biomolecule is highly inevitable. Different surface modification technologies are invented according to the type of a substrate used. Surface modification techniques of the materials used as platforms in the fabrication of biosensors are reviewed in this paper.
Collapse
|
170
|
Ullah MW, Khattak WA, Ul-Islam M, Khan S, Park JK. Metabolic engineering of synthetic cell-free systems: Strategies and applications. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2015.10.023] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
171
|
Khoshsefat M, Ahmadjo S, Mortazavi SMM, Zohuri GH. Reinforcement effects of nanocarbons on catalyst behaviour and polyethylene properties through in situ polymerization. RSC Adv 2016. [DOI: 10.1039/c6ra16243f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
MWCNT (multi-walled carbon nanotube), MWCNT-COOH and xGnP (exfoliated graphene nanoplatelet) were used by in-situ polymerization of ethylene in presence of a binuclear complex (BNC4).
Collapse
Affiliation(s)
- M. Khoshsefat
- Department of Catalyst
- Iran Polymer and Petrochemical Institute (IPPI)
- Tehran
- Iran
| | - S. Ahmadjo
- Department of Catalyst
- Iran Polymer and Petrochemical Institute (IPPI)
- Tehran
- Iran
| | - S. M. M. Mortazavi
- Department of Catalyst
- Iran Polymer and Petrochemical Institute (IPPI)
- Tehran
- Iran
| | - G. H. Zohuri
- Department of Chemistry
- Faculty of Science
- Ferdowsi University of Mashhad
- Mashhad
- Iran
| |
Collapse
|
172
|
A review on protein functionalized carbon nanotubes. J Appl Biomater Funct Mater 2015; 13:e301-12. [PMID: 26660626 DOI: 10.5301/jabfm.5000231] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/07/2015] [Indexed: 11/20/2022] Open
Abstract
Carbon nanotubes (CNTs) have been widely recognized and used for controlled drug delivery and in various other fields due to their unique properties and distinct advantages. Both single-walled carbon nanotubes (SWCNTs) and multiwalled (MWCNTs) carbon nanotubes are used and/or studied for potential applications in medical, energy, textile, composite, and other areas. Since CNTs are chemically inert and are insoluble in water or other organic solvents, they are functionalized or modified to carry payloads or interact with biological molecules. CNTs have been preferably functionalized with proteins because CNTs are predominantly used for medical applications such as delivery of drugs, DNA and genes, and also for biosensing. Extensive studies have been conducted to understand the interactions, cytotoxicity, and potential applications of protein functionalized CNTs but contradicting results have been published on the cytotoxicity of the functionalized CNTs. This paper provides a brief review of CNTs functionalized with proteins, methods used to functionalize the CNTs, and their potential applications.
Collapse
|
173
|
Immobilization of inorganic pyrophosphatase on nanodiamond particles retaining its high enzymatic activity. Biointerphases 2015; 10:041005. [DOI: 10.1116/1.4934483] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
174
|
Tavares APM, Silva CG, Dražić G, Silva AMT, Loureiro JM, Faria JL. Laccase immobilization over multi-walled carbon nanotubes: Kinetic, thermodynamic and stability studies. J Colloid Interface Sci 2015; 454:52-60. [PMID: 26002339 DOI: 10.1016/j.jcis.2015.04.054] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 04/12/2015] [Accepted: 04/25/2015] [Indexed: 01/20/2023]
Abstract
The biocatalytic performance of immobilized enzyme systems depends mostly on the intrinsic properties of both biomolecule and support, immobilization technique and immobilization conditions. Multi-walled carbon nanotubes (MWCNTs) possess unique features for enzyme immobilization by adsorption. Enhanced catalytic activity and stability can be achieved by optimization of the immobilization conditions and by investigating the effect of operational parameters. Laccase was immobilized over MWCNTs by adsorption. The hybrid material was characterized by Fourier transformed infrared (FTIR) spectroscopy, scanning and transmission electron microscopy (SEM and TEM, respectively). The effect of different operational conditions (contact time, enzyme concentration and pH) on laccase immobilization was investigated. Optimized conditions were used for thermal stability, kinetic, and storage and operational stability studies. The optimal immobilization conditions for a laccase concentration of 3.75μL/mL were a pH of 9.0 and a contact time of 30min (522 Ulac/gcarrier). A decrease in the thermal stability of laccase was observed after immobilization. Changes in ΔS and ΔH of deactivation were found for the immobilized enzyme. The Michaelis-Menten kinetic constant was higher for laccase/MWCNT system than for free laccase. Immobilized laccase maintained (or even increased) its catalytic performance up to nine cycles of utilization and revealed long-term storage stability.
Collapse
Affiliation(s)
- Ana P M Tavares
- LCM - Laboratory of Catalysis and Materials, LSRE - Laboratory of Separation and Reaction Engineering, Associate Laboratory LSRE-LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal.
| | - Cláudia G Silva
- LCM - Laboratory of Catalysis and Materials, LSRE - Laboratory of Separation and Reaction Engineering, Associate Laboratory LSRE-LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
| | - Goran Dražić
- Department of Nanostructured Materials, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; Laboratory for Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
| | - Adrián M T Silva
- LCM - Laboratory of Catalysis and Materials, LSRE - Laboratory of Separation and Reaction Engineering, Associate Laboratory LSRE-LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
| | - José M Loureiro
- LCM - Laboratory of Catalysis and Materials, LSRE - Laboratory of Separation and Reaction Engineering, Associate Laboratory LSRE-LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
| | - Joaquim L Faria
- LCM - Laboratory of Catalysis and Materials, LSRE - Laboratory of Separation and Reaction Engineering, Associate Laboratory LSRE-LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
| |
Collapse
|
175
|
Karimi A, Othman A, Uzunoglu A, Stanciu L, Andreescu S. Graphene based enzymatic bioelectrodes and biofuel cells. NANOSCALE 2015; 7:6909-23. [PMID: 25832672 DOI: 10.1039/c4nr07586b] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The excellent electrical conductivity and ease of functionalization make graphene a promising material for use in enzymatic bioelectrodes and biofuel cells. Enzyme based biofuel cells have attracted substantial interest due to their potential to harvest energy from organic materials. This review provides an overview of the functional properties and applications of graphene in the construction of biofuel cells as alternative power sources. The review covers the current state-of-the-art research in graphene based nanomaterials (physicochemical properties and surface functionalities), the role of these parameters in enhancing electron transfer, the stability and activity of immobilized enzymes, and how enhanced power density can be achieved. Specific examples of enzyme immobilization methods, enzyme loading, stability and function on graphene, functionalized graphene and graphene based nanocomposite materials are discussed along with their advantages and limitations. Finally, a critical evaluation of the performance of graphene based enzymatic biofuel cells, the current status, challenges and future research needs are provided.
Collapse
Affiliation(s)
- Anahita Karimi
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, USA.
| | | | | | | | | |
Collapse
|
176
|
Sonochemical production and characterization of d-fructose functionalized MWCNTs/alanine-based poly(amide-imide) nanocomposites. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3530-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
177
|
Monošík R, Angnes L. Utilisation of micro- and nanoscaled materials in microfluidic analytical devices. Microchem J 2015. [DOI: 10.1016/j.microc.2014.12.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
178
|
Guan D, Kurra Y, Liu W, Chen Z. A click chemistry approach to site-specific immobilization of a small laccase enables efficient direct electron transfer in a biocathode. Chem Commun (Camb) 2015; 51:2522-5. [DOI: 10.1039/c4cc09179e] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Controlled orientation of a small laccase on a multi-walled carbon nanotube electrode was achieved via copper-free click chemistry mediated immobilization.
Collapse
Affiliation(s)
- Dongli Guan
- Chemical Engineering Department
- Texas A&M University
- College Station
- USA
| | - Yadagiri Kurra
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | - Wenshe Liu
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | - Zhilei Chen
- Chemical Engineering Department
- Texas A&M University
- College Station
- USA
- Department of Microbial Pathogenesis & Immunology
| |
Collapse
|
179
|
Mallakpour S, Madani M. Valine amino acid-functionalized multiwalled carbon nanotube/chitosan green nanocomposite membranes. HIGH PERFORM POLYM 2014. [DOI: 10.1177/0954008314561245] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The aim of this research was to align functionalized multiwalled carbon nanotubes (MWCNT)–valine amino acid into a chitosan matrix. At first, the MWCNTs were functionalized with valine amino acid and chitosan/grafted MWCNT-valine composites were prepared via covalently bonding of chitosan on the surface of MWCNT-valine. The functionalized MWCNTs and resulting films were characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis, field-emission scanning electron microscopy, and transmission electron microscopy. A significant synergistic effect of MWCNT provided enhanced mechanical properties and thermal stability on the obtained nanocomposites.
Collapse
Affiliation(s)
- Shadpour Mallakpour
- Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan, Islamic Republic of Iran
- Nanotechnology and Advanced Materials Institute, Isfahan University of Technology, Isfahan, Islamic Republic of Iran
- Center of Excellence in Sensors and Green Chemistry, Department of Chemistry, Isfahan University of Technology, Isfahan, Islamic Republic of Iran
| | - Maryam Madani
- Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan, Islamic Republic of Iran
| |
Collapse
|
180
|
Voltammetry of nanoparticle-coupled imine linkage-based receptors for sensing of Al(III) and Co(II) ions. J APPL ELECTROCHEM 2014. [DOI: 10.1007/s10800-014-0746-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
181
|
Verma ML, Puri M, Barrow CJ. Recent trends in nanomaterials immobilised enzymes for biofuel production. Crit Rev Biotechnol 2014; 36:108-19. [DOI: 10.3109/07388551.2014.928811] [Citation(s) in RCA: 131] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
182
|
|
183
|
Silva CG, Tavares APM, Dražić G, Silva AMT, Loureiro JM, Faria JL. Controlling the Surface Chemistry of Multiwalled Carbon Nanotubes for the Production of Highly Efficient and Stable Laccase-Based Biocatalysts. Chempluschem 2014. [DOI: 10.1002/cplu.201402054] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
184
|
Berdjeb L, Pelletier E, Pellerin J, Gagné JP, Lemarchand K. Contrasting responses of marine bacterial strains exposed to carboxylated single-walled carbon nanotubes. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 144-145:230-241. [PMID: 24184842 DOI: 10.1016/j.aquatox.2013.10.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 10/05/2013] [Accepted: 10/08/2013] [Indexed: 06/02/2023]
Abstract
The potential toxic effects of carboxylated (COOH) single-walled carbon nanotubes (SWNTs) were investigated on the cell growth and viability of two reference (Silicibacter pomeroyi, Oceanospirillum beijerinckii) and two environmental (Vibrio splendidus, Vibrio gigantis) Gram-negative marine bacterial strains. Bacterial cells were exposed to six concentrations of SWNT-COOH, during different incubation times. Our results revealed different sensitivity levels of marine bacterial strains toward SWNT-COOH exposure. A bactericidal effect of SWNT-COOH has been observed only for Vibrio species, with cell loss viability estimated to 86% for V. gigantis and 98% for V. splendidus exposed to 100 μg mL(-1) of SWNT-COOH during 2h. For both Vibrio strains, dead cells were well individualized and no aggregate formation was observed after SWNT-COOH treatment. The toxic effect of SWNT-COOH on O. beijerinckii cells displayed time dependence, with a longer exposure time reducing their specific growth rate by a factor of 1.2. No significant effect of SWNT-COOH concentration or incubation time had been demonstrated on both growth ability and viability of S. pomeroyi, suggesting a stronger resistance capacity of this strain to carbon nanotubes. The analysis of the relative expression of some functional genes involved in stress responses, using the real-time reverse transcriptase PCR, suggests that the cell membrane damage is not the main toxicity mechanism by which SWNT-COOH interacts with marine bacterial strains. Overall, our results show that SWNT-COOH present a strain dependent toxic effect to marine bacteria and that membrane damage is not the main toxicity mechanism of SWNT in these bacteria.
Collapse
Affiliation(s)
- Lyria Berdjeb
- Institut des sciences de la mer de Rimouski, Université du Québec à Rimouski, 310 allée des Ursulines, Rimouski, Québec G5L 3A1, Canada
| | | | | | | | | |
Collapse
|
185
|
Thamwattana N, Baowan D, Cox BJ. Modelling bovine serum albumin inside carbon nanotubes. RSC Adv 2013. [DOI: 10.1039/c3ra43991g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|