2251
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Wang H, Yang R, Yang L, Tan W. Nucleic acid conjugated nanomaterials for enhanced molecular recognition. ACS NANO 2009; 3:2451-60. [PMID: 19658387 PMCID: PMC2765789 DOI: 10.1021/nn9006303] [Citation(s) in RCA: 243] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Nucleic acids, whether designed or selected in vitro, play important roles in biosensing, medical diagnostics, and therapy. Specifically, the conjugation of functional nucleic acid based probe molecules and nanomaterials has resulted in an unprecedented improvement in the field of molecular recognition. With their unique physical and chemical properties, nanomaterials facilitate the sensing process and amplify the signal of recognition events. Thus, the coupling of nucleic acids with various nanomaterials opens up a promising future for molecular recognition. The literature offers a broad spectrum of recent advances in biosensing by employing different nanoplatforms with designed nucleic acids, especially gold nanoparticles, carbon nanotubes, silica nanoparticles, and quantum dots. The advantages of these novel combinations are discussed from the perspective of molecular recognition in chemistry, biology, and medicine, along with the problems confronting future applications.
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Affiliation(s)
- Hao Wang
- Biomedical Engineering Center, State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ronghua Yang
- Biomedical Engineering Center, State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
- Corresponding authors: (352) 846-2410 (W.T.); +86-731-8821720 (R. H.)
| | - Liu Yang
- Center for Research at the Bio/Nano Interface, Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center and UF Genetics Institute, University of Florida, Gainesville, Florida, 32611-7200, USA
| | - Weihong Tan
- Biomedical Engineering Center, State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
- Center for Research at the Bio/Nano Interface, Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center and UF Genetics Institute, University of Florida, Gainesville, Florida, 32611-7200, USA
- Corresponding authors: (352) 846-2410 (W.T.); +86-731-8821720 (R. H.)
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2252
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Asharani PV, Hande MP, Valiyaveettil S. Anti-proliferative activity of silver nanoparticles. BMC Cell Biol 2009; 10:65. [PMID: 19761582 PMCID: PMC2759918 DOI: 10.1186/1471-2121-10-65] [Citation(s) in RCA: 377] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2009] [Accepted: 09/17/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Nanoparticles possess exceptional physical and chemical properties which led to rapid commercialisation. Silver nanoparticles (Ag-np) are among the most commercialized nanoparticles due to their antimicrobial potential. Ag-np based cosmetics, therapeutic agents and household products are in wide use, which raised a public concern regarding their safety associated with human and environmental use. No safety regulations are in practice for the use of these nanomaterials. The interactions of nanomaterials with cells, uptake mechanisms, distribution, excretion, toxicological endpoints and mechanism of action remain unanswered. RESULTS Normal human lung fibroblasts (IMR-90) and human glioblastoma cells (U251) were exposed to different doses of Ag-nps in vitro. Uptake of Ag-nps occurred mainly through endocytosis (clathrin mediated process and macropinocytosis), accompanied by a time dependent increase in exocytosis rate. The electron micrographs revealed a uniform intracellular distribution of Ag-np both in cytoplasm and nucleus. Ag-np treated cells exhibited chromosome instability and mitotic arrest in human cells. There was efficient recovery from arrest in normal human fibroblasts whereas the cancer cells ceased to proliferate. Toxicity of Ag-np is mediated through intracellular calcium (Ca2+) transients along with significant alterations in cell morphology and spreading and surface ruffling. Down regulation of major actin binding protein, filamin was observed after Ag-np exposure. Ag-np induced stress resulted in the up regulation of metallothionein and heme oxygenase -1 genes. CONCLUSION Here, we demonstrate that uptake of Ag-np occurs mainly through clathrin mediated endocytosis and macropinocytosis. Our results suggest that cancer cells are susceptible to damage with lack of recovery from Ag-np-induced stress. Ag-np is found to be acting through intracellular calcium transients and chromosomal aberrations, either directly or through activation of catabolic enzymes. The signalling cascades are believed to play key roles in cytoskeleton deformations and ultimately to inhibit cell proliferation.
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Affiliation(s)
- P V Asharani
- Department of Chemistry, Faculty of Science, 3 Science Drive 3, National University of Singapore, 117543 Singapore
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2253
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Ispas C, Andreescu D, Patel A, Goia DV, Andreescu S, Wallace KN. Toxicity and developmental defects of different sizes and shape nickel nanoparticles in zebrafish. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2009; 43:6349-56. [PMID: 19746736 PMCID: PMC2744893 DOI: 10.1021/es9010543] [Citation(s) in RCA: 165] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Metallic nanoparticles such as nickel are used in catalytic sensing, and electronic applications, but health and environmental affects have not been fully investigated. While some metal nanoparticles result in toxicity, it is also important to determine whether nanoparticles of the same metal but of different size and shape changes toxicity. Three different size nickel nanoparticle (Ni NPs) of 30, 60, and 100 nm and larger particle clusters of aggregated 60 nm entities with a dendritic structure were synthesized and exposed to zebrafish embryos assessing mortality and developmental defects. Ni NPs exposure was compared to soluble nickel salts. All three 30, 60, and 100 nm Ni NPs are equal to or less toxic than soluble nickel while dendritic clusters were more toxic. With each Ni NP exposure, thinning of the intestinal epithelium first occurs around the LD10 continuing into the LD50. LD50 exposure also results in skeletal muscle fiber separation. Exposure to soluble nickel does not cause intestinal defects while skeletal muscle separation occurs at concentrations well over LD50. These results suggest that configuration of nanoparticles may affect toxicity more than size and defects from Ni NPs exposure occur by different biological mechanisms than soluble nickel.
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Affiliation(s)
- Cristina Ispas
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY 13699-5810, USA
- Center for Advanced Materials Processing (CAMP), Clarkson University, Potsdam, NY 13699-5810, USA
| | - Daniel Andreescu
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY 13699-5810, USA
- Center for Advanced Materials Processing (CAMP), Clarkson University, Potsdam, NY 13699-5810, USA
| | - Avni Patel
- Department of Biology, Clarkson University, Potsdam, NY 13699-5810, USA
| | - Dan V. Goia
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY 13699-5810, USA
- Center for Advanced Materials Processing (CAMP), Clarkson University, Potsdam, NY 13699-5810, USA
| | - Silvana Andreescu
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY 13699-5810, USA
- Center for Advanced Materials Processing (CAMP), Clarkson University, Potsdam, NY 13699-5810, USA
- Corresponding authors: ,
| | - Kenneth N. Wallace
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY 13699-5810, USA
- Department of Biology, Clarkson University, Potsdam, NY 13699-5810, USA
- Corresponding authors: ,
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2254
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Meng H, Xia T, George S, Nel AE. A predictive toxicological paradigm for the safety assessment of nanomaterials. ACS NANO 2009; 3:1620-7. [PMID: 21452863 DOI: 10.1021/nn9005973] [Citation(s) in RCA: 212] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The rate of expansion of nanomaterials calls for the consideration of appropriate toxicological paradigms in the safety assessment of nanomaterials. We advocate a predictive toxicological paradigm for the assessment of nanomaterial hazards. The predictive toxicological approach is defined as establishing and using mechanisms and pathways of injury at a cellular and molecular level to prioritize screening for adverse biological effects and health outcomes in vivo. Specifically as it relates to nanomaterials, a predictive approach has to consider the physicochemical properties of the material that leads to molecular or cellular injury and also has to be valid in terms of disease pathogenesis in whole organisms.
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Affiliation(s)
- Huan Meng
- Division of NanoMedicine, Department of Medicine, University of California, Los Angeles
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2255
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Yang Q, Liang J, Han H. Probing the Interaction of Magnetic Iron Oxide Nanoparticles with Bovine Serum Albumin by Spectroscopic Techniques. J Phys Chem B 2009; 113:10454-8. [DOI: 10.1021/jp904004w] [Citation(s) in RCA: 183] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qinqin Yang
- College of Science, State Key Laboratory of Agricultural Microbiology, Institute of Chemical Biology, Huazhong Agricultural University, Wuhan, 430070, People’s Republic of China
| | - Jiangong Liang
- College of Science, State Key Laboratory of Agricultural Microbiology, Institute of Chemical Biology, Huazhong Agricultural University, Wuhan, 430070, People’s Republic of China
| | - Heyou Han
- College of Science, State Key Laboratory of Agricultural Microbiology, Institute of Chemical Biology, Huazhong Agricultural University, Wuhan, 430070, People’s Republic of China
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2256
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Eby DM, Schaeublin NM, Farrington KE, Hussain SM, Johnson GR. Lysozyme catalyzes the formation of antimicrobial silver nanoparticles. ACS NANO 2009; 3:984-94. [PMID: 19344124 DOI: 10.1021/nn900079e] [Citation(s) in RCA: 142] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Hen egg white lysozyme acted as the sole reducing agent and catalyzed the formation of silver nanoparticles in the presence of light. Stable silver colloids formed after mixing lysozyme and silver acetate in methanol and the resulting nanoparticles were concentrated and transferred to aqueous solution without any significant changes in physical properties. Activity and antimicrobial assays demonstrated lysozyme-silver nanoparticles retained the hydrolase function of the enzyme and were effective in inhibiting growth of Escherichia coli, Staphylococcus aureus, Bacillus anthracis, and Candida albicans. Remarkably, lysozyme-silver nanoparticles demonstrated a strong antimicrobial effect against silver-resistant Proteus mirabilis strains and a recombinant E. coli strain containing the multiple antibiotic- and silver-resistant plasmid, pMG101. Results of toxicological studies using human epidermal keratinocytes revealed that lysozyme-silver nanoparticles are nontoxic at concentrations sufficient to inhibit microbial growth. Overall, the ability of lysozyme to assemble silver nanoparticles in a one-step reaction offers a simple and environmentally friendly approach to form stable colloids of nontoxic silver nanoparticles that combine the antimicrobial properties of lysozyme and silver. The results expand the functionality of nanomaterials for biological systems and represent a novel antimicrobial composite for potential aseptics and therapeutic use in the future.
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Affiliation(s)
- D Matthew Eby
- Universal Technology Corporation, Materials and Manufacturing Directorate, Air Force Research Laboratory, 139 Barnes Drive, Suite 2, Tyndall Air Force Base, Florida 32403, USA.
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2257
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Mahmoudi M, Simchi A, Milani AS, Stroeve P. Cell toxicity of superparamagnetic iron oxide nanoparticles. J Colloid Interface Sci 2009; 336:510-8. [PMID: 19476952 DOI: 10.1016/j.jcis.2009.04.046] [Citation(s) in RCA: 218] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2009] [Revised: 04/04/2009] [Accepted: 04/08/2009] [Indexed: 11/15/2022]
Abstract
The performance of nanoparticles for biomedical applications is often assessed by their narrow size distribution, suitable magnetic saturation and low toxicity effects. In this work, superparamagnetic iron oxide nanoparticles (SPIONs) with different size, shape and saturation magnetization levels were synthesized via a co-precipitation technique using ferrous salts with a Fe(3+)/Fe(2+) mole ratio equal to 2. A parametric study is conducted, based on a uniform design-of-experiments methodology and a critical polymer/iron mass ratio (r-ratio) for obtaining SPION with narrow size distribution, suitable magnetic saturation, and optimum biocompatibility is identified. Polyvinyl alcohol (PVA) has been used as the nanoparticle coating material, owing to its low toxicity. A 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay is used to investigate the cell biocompatibility/toxicity effects of the samples. From the MTT assay results, it is observed that the biocompatibility of the nanoparticles, based on cell viabilities, can be enhanced by increasing the r-ratio, regardless of the stirring rate. This effect is mainly due to the growth of the particle hydrodynamic size, causing lower cell toxicity effects.
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Affiliation(s)
- M Mahmoudi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
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2258
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Pan M, Li M, You C, Zhao F, Guo M, Xu H, Li L, Wang L, Dou J. [Relaxing of unity and membership democracy in the Danish Nursing Council]. J Cell Physiol 1980; 235:1405-1416. [PMID: 31347176 PMCID: PMC6899543 DOI: 10.1002/jcp.29059] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 06/10/2019] [Indexed: 12/11/2022]
Abstract
Breast cancer patients with high expression of aldehyde dehydrogenases (ALDHs) cell population have higher tolerability to chemotherapy since the cells posses a characteristic of breast cancer stem cells (BCSCs) that are resistant to conventional chemotherapy. In this study, we found that the ALDH‐positive cells were higher in CD44+CD24− and CD44+CD24−ESA+BCSCs than that in both BT549 and MDA‐MB‐231 cell lines but microRNA‐7 (miR‐7) level was lower in CD44+CD24− and CD44+CD24−ESA+BCSCs than that in MDA‐MB‐231 cells. Moreover, miR‐7 overexpression in MDA‐MB‐231 cells decreased ALDH1A3 activity by miR‐7 directly binding to the 3′‐untranslated region of ALDH1A3; while the ALDH1A3 expression was downregulated in MDA‐MB‐231 cells, the expressions of CD44 and Epithelium Specific Antigen (ESA) were reduced along with decreasing the BCSC subpopulation. Significantly, enforced expression of miR‐7 in CD44+CD24−ESA+BCSC markedly inhibited the BCSC‐driven xenograft growth in mice by decreasing an expression of ALDH1A3. Collectively, the findings demonstrate the miR‐7 inhibits breast cancer growth via suppressing ALDH1A3 activity concomitant with decreasing BCSC subpopulation. This approach may be considered for an investigation on clinical treatment of breast cancers.
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Affiliation(s)
- Meng Pan
- Department of Pathogenic Biology and Immunology, School of MedicineSoutheast UniversityNanjingChina
- Department of Judicial Identification, Jiangsu Province HospitalThe First Affiliated Hospital of Nanjing Medical UniversityNanjingChina
| | - Miao Li
- Department of Pathogenic Biology and Immunology, School of MedicineSoutheast UniversityNanjingChina
| | - Chengzhong You
- Department of General Surgery, Zhongda Hospital, School of MedicineSoutheast UniversityNanjingChina
| | - Fengshu Zhao
- Department of Pathogenic Biology and Immunology, School of MedicineSoutheast UniversityNanjingChina
| | - Mei Guo
- Department of Pathogenic Biology and Immunology, School of MedicineSoutheast UniversityNanjingChina
| | - Hui Xu
- Department of Pathogenic Biology and Immunology, School of MedicineSoutheast UniversityNanjingChina
- Department of Gynecology & Obstetrics, Zhongda Hospital, School of MedicineSoutheast UniversityNanjingChina
| | - Luoyang Li
- Department of Pathogenic Biology and Immunology, School of MedicineSoutheast UniversityNanjingChina
| | - Ling Wang
- Department of Pathogenic Biology and Immunology, School of MedicineSoutheast UniversityNanjingChina
| | - Jun Dou
- Department of Pathogenic Biology and Immunology, School of MedicineSoutheast UniversityNanjingChina
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