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Sebokolodi TI, Sipuka DS, Muzenda C, Nkwachukwu OV, Nkosi D, Arotiba OA. Electrochemical detection of nicotine at a carbon Nanofiber-Poly(amidoamine) dendrimer modified glassy carbon electrode. CHEMOSPHERE 2022; 303:134961. [PMID: 35577133 DOI: 10.1016/j.chemosphere.2022.134961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/25/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
Development of electrochemical sensors for important drugs such nicotine (an addictive drug) is important for the society. This study reports the electrochemical detection of nicotine at a carbon nanofiber/poly (amidoamine) dendrimer modified glassy carbon electrode. The carbon nanofiber (CNF) modified GCE was prepared by drop-coating followed by the electrodeposition of generation 4 poly (amidoamine) succinamic acid dendrimer (PAMAM) to form the sensor - CNF-PAMAM GCE. Characterization of prepared materials and modified electrodes was carried out using Fourier transmission infrared spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). The CNF-PAMAM composite was confirmed by microscopy. A marked reduction in charge transfer resistance and increase in current of the CNF-PAMAM GCE in comparison to the bare electrode showed a synergic improvement electrochemical response because of the CNF-PAMAM nanocomposite. The CNF-PAMAM demonstrated an enhanced performance in the oxidation of nicotine in comparison to the bare GCE by shifting the anodic potential Epa of nicotine from 0.9 V to 0.8 V. The electrochemical sensor achieved a detection limit (LOD) of 0.02637 μM in the concentration range of 0.4815-15.41 μM of nicotine in 0.1 M PBS at pH 7.5. The sensor ability to determine nicotine in real samples was assessed in cigarettes obtaining recovery percentages of 88.00 and 97.42%. The sensor demonstrated selectivity toward nicotine in the presence of interferences. Finally, the method was validated by ultraviolet-visible spectroscopy analysis.
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Affiliation(s)
- Tsholofelo I Sebokolodi
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Dimpo S Sipuka
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Charles Muzenda
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Oluchi V Nkwachukwu
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Duduzile Nkosi
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Omotayo A Arotiba
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa; Centre for Nanomaterials Science Research, University of Johannesburg, South Africa.
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2
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Safety Challenges and Application Strategies for the Use of Dendrimers in Medicine. Pharmaceutics 2022; 14:pharmaceutics14061292. [PMID: 35745863 PMCID: PMC9230513 DOI: 10.3390/pharmaceutics14061292] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/11/2022] [Accepted: 06/15/2022] [Indexed: 01/07/2023] Open
Abstract
Dendrimers are used for a variety of applications in medicine but, due to their host–guest and entrapment characteristics, are particularly used for the delivery of genes and drugs. However, dendrimers are intrinsically toxic, thus creating a major limitation for their use in biological systems. To reduce such toxicity, biocompatible dendrimers have been designed and synthesized, and surface engineering has been used to create advantageous changes at the periphery of dendrimers. Although dendrimers have been reviewed previously in the literature, there has yet to be a systematic and comprehensive review of the harmful effects of dendrimers. In this review, we describe the routes of dendrimer exposure and their distribution in vivo. Then, we discuss the toxicity of dendrimers at the organ, cellular, and sub-cellular levels. In this review, we also describe how technology can be used to reduce dendrimer toxicity, by changing their size and surface functionalization, how dendrimers can be combined with other materials to generate a composite formulation, and how dendrimers can be used for the diagnosis of disease. Finally, we discuss future challenges, developments, and research directions in developing biocompatible and safe dendrimers for medical purposes.
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3
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Investigation on the interaction behavior between safranal and pepsin by spectral and MD simulation studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117903] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zadeh Mehrizi T, Mousavi Hosseini K. An overview on the investigation of nanomaterials' effect on plasma components: immunoglobulins and coagulation factor VIII, 2010-2020 review. NANOSCALE ADVANCES 2021; 3:3730-3745. [PMID: 36133015 PMCID: PMC9419877 DOI: 10.1039/d1na00119a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 05/16/2021] [Indexed: 05/04/2023]
Abstract
FVIII and immunoglobulins (Igs) are the most prominent plasma proteins, which play a vital role in plasma hemostasis. These proteins have been implemented frequently in protein therapy. Therefore, their maintenance, durability, and stability are highly essential. Herein, various approaches to improve protein functions have been investigated, such as using recombinant protein replacement. In comparison, advances in nanotechnology have provided adequate context to boost biomaterial utilization. In this regard, the applications of various nanoparticles such as polymeric nanomaterials (PEG and PLGA), metal nanoparticles, dendrimers, and lipid based nanomaterials (liposomes and lipid nanoparticles) in stability and the functional improvement of antibodies and coagulation factor VIII (FVIII) have been reviewed from 2010 to 2020. Reviewing related articles has shown that not only can nanomaterials adequately protect the structure of proteins, but have also improved proteins' functions in some cases. For example, the high rate of FVIII instability has been successfully enhanced by bio-PEGylation. Also, utilizing PEGylated liposomes, using the PEG-lip technique for coating nanostructures, leads to FIIIV half-life prolongation. Hence, PEGylation had most impact on the stability of FVIII. Likewise, PEG-coated liposome nano-carriers also presented such a good effect on stability improvements for FVIII due to their ability to tune the immune system by reducing FVIII immunogenicity. Similarly, Ig PEGylation and conjugation to magnetic nanoparticles resulted in increased half-life and better purification of Igs, respectively, without any loss in structural or functional features. Consequently, metal-organic frameworks and recent hybrid systems have been introduced as promising nanomaterials in biomedical applications. As far as we know, this is the first study in this field, which considers the applications of nanoparticles for improving the storage and stability of antibodies and coagulation FVIII.
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Affiliation(s)
- Tahereh Zadeh Mehrizi
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine Tehran Iran +989338606292
| | - Kamran Mousavi Hosseini
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine Tehran Iran +989338606292
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Kupczak M, Mielańczyk A, Neugebauer D. The Influence of Polymer Composition on the Hydrolytic and Enzymatic Degradation of Polyesters and Their Block Copolymers with PDMAEMA. MATERIALS 2021; 14:ma14133636. [PMID: 34209872 PMCID: PMC8269683 DOI: 10.3390/ma14133636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/21/2021] [Accepted: 06/24/2021] [Indexed: 11/16/2022]
Abstract
Well-defined, semi-degradable polyester/polymethacrylate block copolymers, based on ε-caprolactone (CL), d,l-lactide (DLLA), glycolide (GA) and N,N'-dimethylaminoethyl methacrylate (DMAEMA), were synthesized by ring-opening polymerization (ROP) and atom transfer radical polymerization. Comprehensive degradation studies of poly(ε-caprolactone)-block-poly(N,N'-dimethylaminoethyl methacrylate) (PCL-b-PDMAEMA) on hydrolytic degradation and enzymatic degradation were performed, and those results were compared with the corresponding aliphatic polyester (PCL). The solution pH did not affect the hydrolytic degradation rate of PCL (a 3% Mn loss after six weeks). The presence of a PDMAEMA component in the copolymer chain increased the hydrolysis rates and depended on the solution pH, as PCL-b-PDMAEMA degraded faster in an acidic environment (36% Mn loss determined) than in a slightly alkaline environment (27% Mn loss). Enzymatic degradation of PCL-b-PDMAEMA, poly(d,l-lactide)-block-poly(N,N'-dimethylaminoethyl methacrylate) (PLA-b-PDMAEMA) and poly(lactide-co-glycolide-co-ε-caprolactone)-block-poly(N,N'-dimethylaminoethyl methacrylate) (PLGC-b-PDMAEMA) and the corresponding aliphatic polyesters (PCL, PLA and PLGC) was performed by Novozyme 435. In enzymatic degradation, PLGC degraded almost completely after eleven days. For polyester-b-PDMAEMA copolymers, enzymatic degradation primarily involved the ester bonds in PDMAEMA side chains, and the rate of polyester degradation decreased with the increase in the chain length of PDMAEMA. Amphiphilic copolymers might be used for biomaterials with long-term or midterm applications such as nanoscale drug delivery systems with tunable degradation kinetics.
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Niu C, Wan X. Engineering a Trypsin-Resistant Thermophilic α-Galactosidase to Enhance Pepsin Resistance, Acidic Tolerance, Catalytic Performance, and Potential in the Food and Feed Industry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:10560-10573. [PMID: 32829638 DOI: 10.1021/acs.jafc.0c02175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
α-Galactosidase has potential applications, and attempts to improve proteolytic resistance of enzymes have important values. We use a novel strategy for genetic manipulation of a pepsin-sensitive region specific for a pepsin-sensitive but trypsin-resistant high-temperature-active Gal27B from Neosartorya fischeri to screen mutants with enhanced pepsin resistance. All enzymes were produced in Pichia pastoris to identify the roles of loop 4 (Gal27B-A23) and its key residue at position 156 (Gly156Arg/Pro/His) in pepsin resistance. Gal27B-A23 and Gly156Arg/Pro/His elevated pepsin resistance, thermostability, stability at low pH, activity toward raffinose (5.3-6.9-fold) and stachyose (about 1.3-fold), and catalytic efficiencies (up to 4.9-fold). Replacing the pepsin cleavage site Glu155 with Gly improved pepsin resistance but had no effect on pepsin resistance when Arg/Pro/His was at position 156. Thus, pepsin resistance could appear to occur through steric hindrance between the residue at the altered site and neighboring pepsin active site. In the presence of pepsin or trypsin, all mutations increased the ability of Gal27B to hydrolyze galactosaccharides in soybean flour (up to 9.6- and 4.3-fold, respectively) and promoted apparent metabolizable energy and nutrient digestibility in soybean meal for broilers (1.3-1.8-fold). The high activity and tolerance to heat, low pH, and protease benefit food and feed industry in a cost-effective way.
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Affiliation(s)
- Canfang Niu
- Zhongzhi International Institute of Agricultural Biosciences, Biology and Agriculture Research Center, University of Science and Technology Beijing, Beijing 100024, China
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xiangyuan Wan
- Zhongzhi International Institute of Agricultural Biosciences, Biology and Agriculture Research Center, University of Science and Technology Beijing, Beijing 100024, China
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Glucose-modified carbosilane dendrimers: Interaction with model membranes and human serum albumin. Int J Pharm 2020; 579:119138. [PMID: 32061725 DOI: 10.1016/j.ijpharm.2020.119138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 02/07/2020] [Accepted: 02/11/2020] [Indexed: 12/29/2022]
Abstract
Glycodendrimers are a novel group of dendrimers (DDMs) characterized by surface modifications with various types of glycosides. It has been shown previously that such modifications significantly decrease the cytotoxicity of DDMs. Here, we present an investigation of glucose-modified carbosilane DDMs (first-third-generation, DDM1-3Glu) interactions with two models of biological structures: lipid membranes (liposomes) and serum protein (human serum albumin, HSA). The changes in lipid membrane fluidity with increasing concentration of DDMs was monitored by spectrofluorimetry and calorimetry methods. The influence of glycodendrimers on serum protein was investigated by monitoring changes in protein fluorescence intensity (fluorescence quenching) and as protein secondary structure alterations by circular dichroism spectrometry. Generally, all generations of DDMGlu induced a decrease of membrane fluidity and interacted weakly with HSA. Interestingly, in contrast to other dendritic type polymers, the extent of the DDM interaction with both biological models was not related to DDM generation. The most significant interaction with protein was shown in the case of DDM2Glu, whereas DDM1Glu induced the highest number of changes in membrane fluidity. In conclusion, our results suggest that the flexibility of a DDM molecule, as well as its typical structure (hydrophobic interior and hydrophilic surface) along with the formation of larger aggregates of DDM2-3Glu, significantly affect the type and extent of interaction with biological structures.
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Wang B, Zhang K, Wang J, Zhao R, Zhang Q, Kong X. Poly(amidoamine)-modified mesoporous silica nanoparticles as a mucoadhesive drug delivery system for potential bladder cancer therapy. Colloids Surf B Biointerfaces 2020; 189:110832. [PMID: 32070865 DOI: 10.1016/j.colsurfb.2020.110832] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/22/2020] [Accepted: 01/27/2020] [Indexed: 12/19/2022]
Abstract
Bladder cancer, with the highest recurrence rate in all malignancy, is a common urologic cancer that arises on the bladder mucosa. Currently, tumor resection followed by intravesical chemotherapy is the primary treatment of bladder cancer, which has limited effectiveness ascribe to short dwell-time of intravesical drugs in bladder. Therefore, there is a need to develop mucoadhesive and sustained drug delivery systems to increase drug residence time for intravesical chemotherapy. In this study, poly(amidoamine) (PAMAM) dendrimers were modified onto the surface of mesoporous silica nanoparticles (MSNPs) through a layer-by-layer grafting method. A series of PAMAM-modified MSNPs were prepared and compared for their mucoadhesive capabilities on pig bladder wall and controlled drug release properties. Results demonstrated an increase in the mucoadhesive capacity of PAMAM-modified MSNPs upon an increase in the number of PAMAM amino groups, and the maximum nanoparticle mucoadhesivity was observed after two-generation PAMAM were grafted on the surface of MSNPs. An antineoplastic, doxorubicin, was encapsulated in the mesopores of PAMAM-modified MSNPs, and the drug-loaded nanoparticles can provide a sustained drug release triggered by acidic pH. The present study demonstrates that the mucoadhesive and drug release properties of MSNPs can be controlled by the layer number of PAMAM dendrimers on the nanoparticle surface, holding significant potential for the development of mucoadhesive drug delivery systems for bladder cancer therapy.
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Affiliation(s)
- Beilei Wang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Kebiao Zhang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiadong Wang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Ruibo Zhao
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; Zhejiang-Mauritius Joint Research Center for Biomaterials and Tissue Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Quan Zhang
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; Zhejiang-Mauritius Joint Research Center for Biomaterials and Tissue Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Xiangdong Kong
- School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; Zhejiang-Mauritius Joint Research Center for Biomaterials and Tissue Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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9
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Wu Q, Shan T, Zhao M, Mai S, Gu L. The inhibitory effect of carboxyl-terminated polyamidoamine dendrimers on dentine host-derived matrix metalloproteinases in vitro in an etch-and-rinse adhesive system. ROYAL SOCIETY OPEN SCIENCE 2019; 6:182104. [PMID: 31824679 PMCID: PMC6837191 DOI: 10.1098/rsos.182104] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 09/08/2019] [Indexed: 06/10/2023]
Abstract
The biomimetic remineralization of collagen fibrils has increased interest in restoring the demineralized dentine generated by dental caries. Carboxyl-terminated polyamidoamine dendrimers (PAMAM-COOH), hyperbranched polymeric macromolecules, can act as non-collagenous proteins to induce biomimetic remineralization on a dentine organic matrix. However, in vivo remineralization is an extremely time-consuming process; before complete remineralization, demineralized dentine collagen fibrils are susceptible to degradation by host-derived matrix metalloproteinases (MMPs). Therefore, we examined the effect of fourth-generation PAMAM-COOH (G4-PAMAM-COOH) on the collagenolytic activities of endogenous MMPs, the interaction between G4-PAMAM-COOH and demineralized dentine collagen and the influence of G4-PAMAM-COOH pre-treatment on resin-dentine bonding. G4-PAMAN-COOH not only inhibited exogenous soluble rhMMP9 but also hampered the proteolytic activities of dentine collagen-bound MMPs. Cooperated with the results of G4-PAMAM-COOH absorption and desorption, FTIR spectroscopy provided evidence for the exclusive electrostatic interaction rather than hydrogen or covalent bonding between G4-PAMAM-COOH and dentine collagen. Furthermore, G4-PAMAM-COOH pre-treatment showed no damage to resin-dentine bonding because it did not significantly decrease the elastic modulus of the demineralized dentine, degree of conversion, penetration of the adhesive into the dentinal tubules or ultimate tensile strength. Thus, G4-PAMAM-COOH can effectively inactivate MMPs, retard the enzymolysis of collagen by MMPs and scarcely influence the application of resin-dentine bonding.
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Affiliation(s)
| | | | | | | | - Lisha Gu
- Author for correspondence: Lisha Gu e-mail:
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10
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Murugan B, Krishnan UM. Chemoresponsive smart mesoporous silica systems – An emerging paradigm for cancer therapy. Int J Pharm 2018; 553:310-326. [DOI: 10.1016/j.ijpharm.2018.10.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 10/07/2018] [Accepted: 10/09/2018] [Indexed: 02/06/2023]
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PAMAM dendrimer - cell membrane interactions. Adv Colloid Interface Sci 2018; 257:1-18. [PMID: 30008347 DOI: 10.1016/j.cis.2018.06.005] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/20/2018] [Accepted: 06/21/2018] [Indexed: 12/16/2022]
Abstract
PAMAM dendrimers have been conjectured for a wide range of biomedical applications due to their tuneable physicochemical properties. However, their application has been hindered by uncertainties in their cytotoxicity, which is influenced by dendrimer generation (i.e. size and surface group density), surface chemistry, and dosage, as well as cell specificity. In this review, biomedical applications of polyamidoamine (PAMAM) dendrimers and some related cytotoxicity studies are first outlined. Alongside these in vitro experiments, lipid membranes such as supported lipid bilayers (SLBs), liposomes, and Langmuir monolayers have been used as cell membrane models to study PAMAM dendrimer-membrane interactions. Related experimental and theoretical studies are summarized, and the physical insights from these studies are discussed to shed light on the fundamental understanding of PAMAM dendrimer-cell membrane interactions. We conclude with a summary of some questions that call for further investigations.
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Naha PC, Mukherjee SP, Byrne HJ. Toxicology of Engineered Nanoparticles: Focus on Poly(amidoamine) Dendrimers. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15020338. [PMID: 29443901 PMCID: PMC5858407 DOI: 10.3390/ijerph15020338] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/05/2018] [Accepted: 02/12/2018] [Indexed: 12/14/2022]
Abstract
Engineered nanomaterials are increasingly being developed for paints, sunscreens, cosmetics, industrial lubricants, tyres, semiconductor devices, and also for biomedical applications such as in diagnostics, therapeutics, and contrast agents. As a result, nanomaterials are being manufactured, transported, and used in larger and larger quantities, and potential impacts on environmental and human health have been raised. Poly(amidoamine) (PAMAM) dendrimers are specifically suitable for biomedical applications. They are well-defined nanoscale molecules which contain a 2-carbon ethylenediamine core and primary amine groups at the surface. The systematically variable structural architecture and the large internal free volume make these dendrimers an attractive option for drug delivery and other biomedical applications. Due to the wide range of applications, the Organisation for Economic Co-Operation and Development (OECD) have included them in their list of nanoparticles which require toxicological assessment. Thus, the toxicological impact of these PAMAM dendrimers on human health and the environment is a matter of concern. In this review, the potential toxicological impact of PAMAM dendrimers on human health and environment is assessed, highlighting work to date exploring the toxicological effects of PAMAM dendrimers.
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Affiliation(s)
- Pratap C Naha
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA-19104, USA.
| | - Sourav P Mukherjee
- Molecular Toxicology Unit, Institute of Environmental Medicine (IMM), Karolinska Institutet, 17177 Stockholm, Sweden.
| | - Hugh J Byrne
- FOCAS Research Institute, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland.
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Shcharbin D, Shcharbina N, Dzmitruk V, Pedziwiatr-Werbicka E, Ionov M, Mignani S, de la Mata FJ, Gómez R, Muñoz-Fernández MA, Majoral JP, Bryszewska M. Dendrimer-protein interactions versus dendrimer-based nanomedicine. Colloids Surf B Biointerfaces 2017; 152:414-422. [PMID: 28167455 DOI: 10.1016/j.colsurfb.2017.01.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/22/2017] [Accepted: 01/23/2017] [Indexed: 12/12/2022]
Abstract
Dendrimers are hyperbranched polymers belonging to the huge class of nanomedical devices. Their wide application in biology and medicine requires understanding of the fundamental mechanisms of their interactions with biological systems. Summarizing, electrostatic force plays the predominant role in dendrimer-protein interactions, especially with charged dendrimers. Other kinds of interactions have been proven, such as H-bonding, van der Waals forces, and even hydrophobic interactions. These interactions depend on the characteristics of both participants: flexibility and surface charge of a dendrimer, rigidity of protein structure and the localization of charged amino acids at its surface. pH and ionic strength of solutions can significantly modulate interactions. Ligands and cofactors attached to a protein can also change dendrimer-protein interactions. Binding of dendrimers to a protein can change its secondary structure, conformation, intramolecular mobility and functional activity. However, this strongly depends on rigidity versus flexibility of a protein's structure. In addition, the potential applications of dendrimers to nanomedicine are reviwed related to dendrimer-protein interactions.
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Affiliation(s)
- Dzmitry Shcharbin
- Institute of Biophysics and Cell Engineering of NASB, Minsk, Belarus.
| | | | - Volha Dzmitruk
- Institute of Biophysics and Cell Engineering of NASB, Minsk, Belarus
| | - Elzbieta Pedziwiatr-Werbicka
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Maksim Ionov
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Serge Mignani
- Université Paris Descartes, Laboratoire de Chimie et de Biochimie pharmacologiques et toxicologique, Paris, France
| | - F Javier de la Mata
- Departamento Química Orgánica y Química Inorgánica, Universidad de Alcalá, Alcalá de Henares, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain
| | - Rafael Gómez
- Departamento Química Orgánica y Química Inorgánica, Universidad de Alcalá, Alcalá de Henares, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain
| | - Maria Angeles Muñoz-Fernández
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain; Laboratorio InmunoBiología Molecular, Hospital General Universitario Gregorio Marañón, Madrid, Spain; Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain; Spanish HIV-HGM BioBank, Madrid, Spain
| | - Jean-Pierre Majoral
- Laboratoire de Chimie de Coordination, CNRS, Toulouse, France; Université de Toulouse, Toulouse, France
| | - Maria Bryszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
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Zeng Y, Kurokawa Y, Zeng Q, Win-Shwe TT, Nansai H, Zhang Z, Sone H. Effects of Polyamidoamine Dendrimers on a 3-D Neurosphere System Using Human Neural Progenitor Cells. Toxicol Sci 2016; 152:128-44. [DOI: 10.1093/toxsci/kfw068] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Ahmed S, Vepuri SB, Kalhapure RS, Govender T. Interactions of dendrimers with biological drug targets: reality or mystery - a gap in drug delivery and development research. Biomater Sci 2016; 4:1032-50. [PMID: 27100841 DOI: 10.1039/c6bm00090h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Dendrimers have emerged as novel and efficient materials that can be used as therapeutic agents/drugs or as drug delivery carriers to enhance therapeutic outcomes. Molecular dendrimer interactions are central to their applications and realising their potential. The molecular interactions of dendrimers with drugs or other materials in drug delivery systems or drug conjugates have been extensively reported in the literature. However, despite the growing application of dendrimers as biologically active materials, research focusing on the mechanistic analysis of dendrimer interactions with therapeutic biological targets is currently lacking in the literature. This comprehensive review on dendrimers over the last 15 years therefore attempts to identify the reasons behind the apparent lack of dendrimer-receptor research and proposes approaches to address this issue. The structure, hierarchy and applications of dendrimers are briefly highlighted, followed by a review of their various applications, specifically as biologically active materials, with a focus on their interactions at the target site. It concludes with a technical guide to assist researchers on how to employ various molecular modelling and computational approaches for research on dendrimer interactions with biological targets at a molecular level. This review highlights the impact of a mechanistic analysis of dendrimer interactions on a molecular level, serves to guide and optimise their discovery as medicinal agents, and hopes to stimulate multidisciplinary research between scientific, experimental and molecular modelling research teams.
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Affiliation(s)
- Shaimaa Ahmed
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa.
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Schulz JD, Patt M, Basler S, Kries H, Hilvert D, Gauthier MA, Leroux JC. Site-Specific Polymer Conjugation Stabilizes Therapeutic Enzymes in the Gastrointestinal Tract. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:1455-1460. [PMID: 26640034 DOI: 10.1002/adma.201504797] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 10/30/2015] [Indexed: 06/05/2023]
Abstract
The site-specific conjugation of polymers to multiple engineered cysteine residues of a prolyl endopeptidase leads to its stabilization in the gastrointestinal tract of rats, without compromising the activity relative to the native enzyme. The importance of polymer attachment sites is investigated, as well as the significance of polymer structure.
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Affiliation(s)
- Jessica D Schulz
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology Zurich (ETH Zurich), 8093, Zurich, Switzerland
| | - Melanie Patt
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology Zurich (ETH Zurich), 8093, Zurich, Switzerland
| | - Sophie Basler
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology Zurich (ETH Zurich), 8093, Zurich, Switzerland
| | - Hajo Kries
- Department of Chemistry and Applied Biosciences, Laboratory of Organic Chemistry, Swiss Federal Institute of Technology Zurich (ETH Zurich), 8093, Zurich, Switzerland
| | - Donald Hilvert
- Department of Chemistry and Applied Biosciences, Laboratory of Organic Chemistry, Swiss Federal Institute of Technology Zurich (ETH Zurich), 8093, Zurich, Switzerland
| | - Marc A Gauthier
- EMT Research Center, Institut National de la Recherche Scientifique (INRS), J3X 1S2 Varennes, Quebec, Canada
| | - Jean-Christophe Leroux
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology Zurich (ETH Zurich), 8093, Zurich, Switzerland
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17
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Szwed A, Milowska K, Ionov M, Shcharbin D, Moreno S, Gomez-Ramirez R, de la Mata FJ, Majoral JP, Bryszewska M, Gabryelak T. Interaction between dendrimers and regulatory proteins. Comparison of effects of carbosilane and carbosilane–viologen–phosphorus dendrimers. RSC Adv 2016. [DOI: 10.1039/c6ra16558c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
For nanoparticles to be used successfully in biomedical application, their interactions with biological fluids need to be investigated, in which they will react with proteins and other macromolecules.
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18
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Mekuria SL, Debele TA, Tsai HC. PAMAM dendrimer based targeted nano-carrier for bio-imaging and therapeutic agents. RSC Adv 2016. [DOI: 10.1039/c6ra12895e] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
In the last several decades, researchers have focused on developing suitable drug carriers to deliver pharmaceutical agents to treat cancer diseases.
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Affiliation(s)
- Shewaye Lakew Mekuria
- Graduate Institute of Applied Science and Technology
- National Taiwan University of Science and Technology
- Taipei 106
- Republic of China
| | - Tilahun Ayane Debele
- Graduate Institute of Applied Science and Technology
- National Taiwan University of Science and Technology
- Taipei 106
- Republic of China
| | - Hsieh-Chih Tsai
- Graduate Institute of Applied Science and Technology
- National Taiwan University of Science and Technology
- Taipei 106
- Republic of China
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19
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Piyasaengthong A, Boonyalai N, Suramitr S, Songsasen A. Synthesis, characterization, and pepsin inhibition study of Au(III)–3-(2′-thiazolylazo)-2,6-diaminopyridine complex. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2015.06.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Kawara F, Inoue J, Takenaka M, Hoshi N, Masuda A, Nishiumi S, Kutsumi H, Azuma T, Ohdaira T. The influences of pepsin concentrations and pH levels on the disinfective activity of ozone nanobubble water against helicobacter pylori. Digestion 2015; 90:10-7. [PMID: 25096714 DOI: 10.1159/000358286] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 01/01/2014] [Indexed: 02/04/2023]
Abstract
AIMS To investigate the utility of ozone nanobubble water (NBW3) for the treatment of Helicobacter pylori in the stomach, we tested the influence of pepsin concentrations and pH levels on the disinfective activity of NBW3, and the cytotoxicity of NBW3 against mammalian cells and mucosa. METHODS Different concentrations of pepsin were dissolved in NBW3, and the bactericidal activity was tested on H. pylori. NBW3 was adjusted to different pH levels (2.0-7.4) and the bactericidal activity on H. pylori was also tested. To examine the cytotoxicity of NBW3, AGS cells, human gastric epithelial cells, were treated with NBW3 and the viability of the cells was evaluated in vitro. Furthermore, NBW3 was administered to mice and gastric mucosal damage was evaluated by histology. RESULTS Pepsin reduced the disinfective activity of NBW3 on H. pylori in a pepsin concentration-dependent manner. NBW3 showed stable disinfective activity at all pH levels examined. Cytotoxicity of NBW3 against human gastric epithelial cells and gastric mucosa was not observed in our experimental setting. CONCLUSIONS NBW3 can sustain its disinfective activity in wide range of pH levels and show no cytotoxicity on mammalian cells and tissue. Pepsin can inhibit NBW3 activity in a dose-dependent manner.
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Affiliation(s)
- Fumiaki Kawara
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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21
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Wang YQ, Zhang HM. Exploration of binding of C.I. Food Red 9 with pepsin by optical spectroscopic and molecular docking methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 149:822-829. [PMID: 26001101 DOI: 10.1016/j.saa.2015.05.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 05/05/2015] [Accepted: 05/06/2015] [Indexed: 06/04/2023]
Abstract
A comprehensive study of the effects of C.I. Food Red 9 on the conformation and activity of pepsin was performed using multi-spectral methods and molecular docking technique. Fluorescence and circular dichroism spectral analyzes showed that C.I. Food Red 9 binding induced the changes of secondary and tertiary structure of pepsin. The activity experimental results indicated that the activity of pepsin decreased remarkably with the increasing concentration of C.I. Food Red 9. Multi non-covalent interactions including hydrogen bonds, hydrophobic, and electrostatic forces played important roles in the complex formation between C.I. Food Red 9 and pepsin. The binding constants of pepsin with C.I. Food Red 9 were (1.21±0.036)×10(4) L mol(-1) (298 K) and (1.05±0.043)×10(4) L mol(-1) (310 K). Moreover, the putative binding site of C.I. Food Red 9 on pepsin was near to activity pocket. This study demonstrates that C.I. Food Red 9 could cause some negative effects on pepsin.
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Affiliation(s)
- Yan-Qing Wang
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City, Jiangsu Province 224002, People's Republic of China.
| | - Hong-Mei Zhang
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City, Jiangsu Province 224002, People's Republic of China
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22
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Shen L, Xu H, Huang F, Li Y, Xiao H, Yang Z, Hu Z, He Z, Zeng Z, Li Y. Investigation on interaction between Ligupurpuroside A and pepsin by spectroscopic and docking methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:256-263. [PMID: 25078459 DOI: 10.1016/j.saa.2014.06.087] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 06/02/2014] [Accepted: 06/06/2014] [Indexed: 06/03/2023]
Abstract
Ligupurpuroside A is one of the major glycoside in Ku-Din-Cha, a type of Chinese functional tea. In order to better understand its digestion and metabolism in humans, the interaction between Ligupurpuroside A and pepsin has been investigated by fluorescence spectra, UV-vis absorption spectra and synchronous fluorescence spectra along with molecular docking method. The fluorescence experiments indicate that Ligupurpuroside A can effectively quench the intrinsic fluorescence of pepsin through a combined quenching way at the low concentration of Ligupurpuroside A, and a static quenching procedure at the high concentration. The binding constant, binding sites of Ligupurpuroside A with pepsin have been calculated. The thermodynamic analysis suggests that non-covalent reactions, including electrostatic force, hydrophobic interaction and hydrogen bond are the main forces stabilizing the complex. According to the Förster's non-radiation energy transfer theory, the binding distance between pepsin and Ligupurpuroside A was calculated to be 3.15 nm, which implies that energy transfer occurs between pepsin and Ligupurpuroside A. Conformation change of pepsin was observed from UV-vis absorption spectra and synchronous fluorescence spectra under experimental conditions. In addition, all these experimental results have been validated by the protein-ligand docking studies which show that Ligupurpuroside A is located in the cleft between the domains of pepsin.
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Affiliation(s)
- Liangliang Shen
- College of Life Sciences, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen 518060, China
| | - Hong Xu
- College of Life Sciences, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen 518060, China.
| | - Fengwen Huang
- College of Life Sciences, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen 518060, China
| | - Yi Li
- College of Life Sciences, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen 518060, China
| | - Huafeng Xiao
- College of Life Sciences, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen 518060, China
| | - Zhen Yang
- College of Life Sciences, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen 518060, China
| | - Zhangli Hu
- College of Life Sciences, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen 518060, China
| | - Zhendan He
- School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Zheling Zeng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Yinong Li
- Center of Inspection and Quarantine of Shenzhen Entry & Exit Animal, Plant & Food, Shenzhen 518000, China
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23
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Enciso AE, Garzoni M, Pavan GM, Simanek EE. Influence of linker groups on the solubility of triazine dendrimers. NEW J CHEM 2015. [DOI: 10.1039/c4nj00917g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The choice of linking diamine has profound influence on the solubility of triazine dendrimers.
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Affiliation(s)
- Alan E. Enciso
- Department of Chemistry
- Texas Christian University
- Fort Worth
- USA
| | - Matteo Garzoni
- Department of Innovative Technologies
- University of Applied Science of Southern Switzerland
- 6962 Manno
- Switzerland
| | - Giovanni M. Pavan
- Department of Innovative Technologies
- University of Applied Science of Southern Switzerland
- 6962 Manno
- Switzerland
| | - Eric E. Simanek
- Department of Chemistry
- Texas Christian University
- Fort Worth
- USA
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24
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Mechanisms Underlying Cytotoxicity Induced by Engineered Nanomaterials: A Review of In Vitro Studies. NANOMATERIALS 2014; 4:454-484. [PMID: 28344232 PMCID: PMC5304664 DOI: 10.3390/nano4020454] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 05/28/2014] [Accepted: 06/03/2014] [Indexed: 12/28/2022]
Abstract
Engineered nanomaterials are emerging functional materials with technologically interesting properties and a wide range of promising applications, such as drug delivery devices, medical imaging and diagnostics, and various other industrial products. However, concerns have been expressed about the risks of such materials and whether they can cause adverse effects. Studies of the potential hazards of nanomaterials have been widely performed using cell models and a range of in vitro approaches. In the present review, we provide a comprehensive and critical literature overview on current in vitro toxicity test methods that have been applied to determine the mechanisms underlying the cytotoxic effects induced by the nanostructures. The small size, surface charge, hydrophobicity and high adsorption capacity of nanomaterial allow for specific interactions within cell membrane and subcellular organelles, which in turn could lead to cytotoxicity through a range of different mechanisms. Finally, aggregating the given information on the relationships of nanomaterial cytotoxic responses with an understanding of its structure and physicochemical properties may promote the design of biologically safe nanostructures.
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25
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Zhang HM, Lou K, Cao J, Wang YQ. Interaction of a hydrophobic-functionalized PAMAM dendrimer with bovine serum albumin: thermodynamic and structural changes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5536-5544. [PMID: 24797501 DOI: 10.1021/la501129y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The interaction between a hydrophobic-functionalized PAMAM dendrimer (PAMAM-NH2-C12, 25%, G4) and bovine serum albumin (BSA) has been investigated by circular dichroism (CD), UV-vis, and fluorescence spectroscopic methods and molecular modeling. The analysis of the effects of dendrimer complexation on the stability and conformation of BSA indicated that the binding process of the hydrophobic-functionalized dendrimer with BSA induced the relatively large changes in secondary structure of protein. Thermal denaturation of BSA, when carried out in the presence of dendrimer, also indicated that this hydrophobic-functionalized dendrimer acted as a structure destabilizer for BSA. The hydrophobic, electrostatic, and hydrogen bonding forces played important roles in the complex formation. The putative binding site of PAMAM-NH2-C12 (25%) dendrimer on BSA was near to domain I and domain II. The effect of hydrophobic modification on the stability and structure of BSA would find useful information on the cytotoxicity of PAMAM dendrimer.
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Affiliation(s)
- Hong-Mei Zhang
- Institute of Applied Chemistry and Environmental Engineering, Yancheng Teachers University , Yancheng City, Jiangsu Province 224002, People's Republic of China
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26
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Yang L, da Rocha SRP. PEGylated, NH2-Terminated PAMAM Dendrimers: A Microscopic View from Atomistic Computer Simulations. Mol Pharm 2014; 11:1459-70. [DOI: 10.1021/mp400630z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Lin Yang
- Department of Chemical Engineering
and Materials Science, College of Engineering, Wayne State University, 5050 Anthony Wayne Drive, 1133ENG, Detroit, Michigan 48202, United States
| | - Sandro R. P. da Rocha
- Department of Chemical Engineering
and Materials Science, College of Engineering, Wayne State University, 5050 Anthony Wayne Drive, 1133ENG, Detroit, Michigan 48202, United States
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27
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Lazniewska J, Janaszewska A, Miłowska K, Caminade AM, Mignani S, Katir N, El Kadib A, Bryszewska M, Majoral JP, Gabryelak T, Klajnert-Maculewicz B. Promising low-toxicity of viologen-phosphorus dendrimers against embryonic mouse hippocampal cells. Molecules 2013; 18:12222-40. [PMID: 24084024 PMCID: PMC6270227 DOI: 10.3390/molecules181012222] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/24/2013] [Accepted: 09/24/2013] [Indexed: 02/01/2023] Open
Abstract
A new class of viologen-phosphorus dendrimers (VPDs) has been recently shown to possess the ability to inhibit neurodegenerative processes in vitro. Nevertheless, in the Central Nervous Systems domain, there is little information on their impact on cell functions, especially on neuronal cells. In this work, we examined the influence of two VPD (VPD1 and VPD3) of zero generation (G0) on murine hippocampal cell line (named mHippoE-18). Extended analyses of cell responses to these nanomolecules comprised cytotoxicity test, reactive oxygen species (ROS) generation studies, mitochondrial membrane potential (ΔΨm) assay, cell death detection, cell morphology assessment, cell cycle studies, as well as measurements of catalase (CAT) activity and glutathione (GSH) level. The results indicate that VPD1 is more toxic than VPD3. However, these two tested dendrimers did not cause a strong cellular response, and induced a low level of apoptosis. Interestingly, VPD1 and VPD3 treatment led to a small decline in ROS level compared to untreated cells, which correlated with slightly increased catalase activity. This result indicates that the VPDs can indirectly lower the level of ROS in cells. Summarising, low-cytotoxicity on mHippoE-18 cells together with their ability to quench ROS, make the VPDs very promising nanodevices for future applications in the biomedical field as nanocarriers and/or drugs per se.
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Affiliation(s)
- Joanna Lazniewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, Lodz 90236, Poland.
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