51
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Affiliation(s)
- Jingjing Hu
- CAS Key Laboratory of Soft Matter
Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, People’s
Republic of China
| | - Tongwen Xu
- CAS Key Laboratory of Soft Matter
Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, People’s
Republic of China
| | - Yiyun Cheng
- Shanghai Key Laboratory of Regulatory
Biology, School of Life Sciences, East China Normal University, Shanghai, 200241, People’s Republic of China
- Shanghai
Key Laboratory of Magnetic
Resonance, Department of Physics, East China Normal University, Shanghai, 200062, P.R.China
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52
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Geibel B, Merschky M, Rether C, Schmuck C. Artificial Enzyme Mimics. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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53
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Liu J, Zhou J, Luo Y. SiRNA Delivery Systems Based on Neutral Cross-Linked Dendrimers. Bioconjug Chem 2012; 23:174-83. [DOI: 10.1021/bc200433s] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jie Liu
- Department of Biomedical Engineering, College of Engineering, Peking University, Room 206, Fangzheng Building, 298 Chengfu Road, Haidian District,
Beijing, China 100871
| | - Jihan Zhou
- Beijing
National Laboratory
for Molecular Sciences and the Key Laboratory of Polymer Chemistry
and Physics of Ministry of Education, College of Chemistry
and Molecular Engineering, Peking University, Beijing, China, 100871
| | - Ying Luo
- Department of Biomedical Engineering, College of Engineering, Peking University, Room 206, Fangzheng Building, 298 Chengfu Road, Haidian District,
Beijing, China 100871
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54
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Bogdan N, Roy R, Morin M. Glycodendrimer coated gold nanoparticles for proteins detection based on surface energy transfer process. RSC Adv 2012. [DOI: 10.1039/c1ra00904d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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55
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Tomalia DA. Dendritic effects: dependency of dendritic nano-periodic property patterns on critical nanoscale design parameters (CNDPs). NEW J CHEM 2012. [DOI: 10.1039/c1nj20501c] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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56
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Monteagudo S, Pérez-Martínez FC, Pérez-Carrión MD, Guerra J, Merino S, Sánchez-Verdú MP, Ceña V. Inhibition of p42 MAPK using a nonviral vector-delivered siRNA potentiates the anti-tumor effect of metformin in prostate cancer cells. Nanomedicine (Lond) 2011; 7:493-506. [PMID: 21995500 DOI: 10.2217/nnm.11.61] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
AIMS The aim of this work was to study if a G1-polyamidoamine dendrimer/siRNA dendriplex can remove the p42 MAPK protein in prostate cancer cells and to potentiate the anti-tumoral effect of the antidiabetic drug metformin and taxane docetaxel. MATERIAL & METHODS The dendriplex uptake was studied using flow cytometry analysis. Transfection efficiency was determined by measuring p42 MAPK mRNA and protein levels. Anti-tumoral effects were determined by measuring cellular proliferation and damage. RESULTS The dendriplex siRNA/G1-polyamidoamine dendrimer decreased both p42 MAPK mRNA and protein levels by more than 80%, which potentiates the anti-tumoral effects of metformin. CONCLUSION Blockade of the MAPK pathway using a dendrimer-vehiculized siRNA to block the MAPK signaling pathway in prostate cancer cells can potentiate the anti-tumoral activity of anticancer drugs, indicating that the combination of siRNA-mediated blockade of survival signals plus anti-tumoral therapy might be a useful approach for cancer therapy.
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57
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Synthesis of glycopeptide dendrimers, dimerization and affinity for Concanavalin A. Bioorg Med Chem 2011; 19:2879-87. [DOI: 10.1016/j.bmc.2011.03.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 03/08/2011] [Accepted: 03/18/2011] [Indexed: 12/17/2022]
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58
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Filipowicz A, Wołowiec S. Solubility and in vitro transdermal diffusion of riboflavin assisted by PAMAM dendrimers. Int J Pharm 2011; 408:152-6. [DOI: 10.1016/j.ijpharm.2011.01.033] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 01/14/2011] [Accepted: 01/18/2011] [Indexed: 10/18/2022]
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59
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Perreault F, Bogdan N, Morin M, Claverie J, Popovic R. Interaction of gold nanoglycodendrimers with algal cells (Chlamydomonas reinhardtii) and their effect on physiological processes. Nanotoxicology 2011; 6:109-20. [DOI: 10.3109/17435390.2011.562325] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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60
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Feng X, Cheng Y, Wu Q, Zhang J, Xu T. Stimuli Response of Cystamine-Core Dendrimer Revealed by Diffusion and NOE NMR Studies. J Phys Chem B 2011; 115:3777-83. [DOI: 10.1021/jp2003613] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
| | - Yiyun Cheng
- School of Life Sciences, East China Normal University, Shanghai, 200062, People’s Republic of China
| | - Qinglin Wu
- School of Life Sciences, East China Normal University, Shanghai, 200062, People’s Republic of China
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61
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Gao B, Li H, Xia D, Sun S, Ba X. Amphiphilic dendritic peptides: Synthesis and behavior as an organogelator and liquid crystal. Beilstein J Org Chem 2011; 7:198-203. [PMID: 21448258 PMCID: PMC3063067 DOI: 10.3762/bjoc.7.26] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 01/09/2011] [Indexed: 11/23/2022] Open
Abstract
New amphiphilic dendritic peptides on dendritic polyaspartic acid were designed and synthesized. The organogel and liquid crystal properties of these amphiphilic dendritic peptides were fully studied by field-emission SEM, temperature dependent FT-IR, differential scanning calorimetry, polarization optical microscopy and X-ray diffraction experiments. Amphiphilic dendritic peptides G3 show good organogel properties with a minimum gelation concentration as low as 1 wt %. Furthermore, amphiphilic dendritic peptides G3 can form a hexagonal columnar liquid crystal assembly over a wide temperature range.
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Affiliation(s)
- Baoxiang Gao
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry and Environment Science, Hebei University, Baoding 071002, P.R. China
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62
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Palladium(0) deposited on PAMAM dendrimers as a catalyst for C-C cross coupling reactions. Molecules 2011; 16:427-41. [PMID: 21221061 PMCID: PMC6259269 DOI: 10.3390/molecules16010427] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 01/04/2011] [Accepted: 01/07/2011] [Indexed: 11/16/2022] Open
Abstract
PAMAM dendrimers of generations G2-G3 as well as a partially substituted derivative of generation G4 and a low-molecular-weight tricyclic ligand 4 were used to bind Pd(0) nanoparticles. The obtained adducts were tested as catalysts for C-C cross-coupling reactions, such as the Suzuki-Miyaura, Hiyama, Heck and Sonogashira reaction. The highest yields of the coupling product, diphenylacetylene, were obtained with all the catalysts studied in the Sonogashira coupling performed in ethanol with K₂CO₃ as base. Very good results, 85-100%, were also found in the Suzuki-Miyaura cross-coupling, while the efficiency of the Hiyama coupling appeared lower, with 38-52% of 2-methylbiphenyl formed. In all reactions, the G2-Pd(0) catalyst, containing an unmodified dendrimer, afforded the highest yields of the cross-coupling products.
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63
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64
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Felber AE, Castagner B, Elsabahy M, Deleavey GF, Damha MJ, Leroux JC. siRNA nanocarriers based on methacrylic acid copolymers. J Control Release 2010; 152:159-67. [PMID: 21195736 DOI: 10.1016/j.jconrel.2010.12.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Revised: 12/21/2010] [Accepted: 12/22/2010] [Indexed: 12/01/2022]
Abstract
Poly(ethylene glycol)-b-poly(propyl methacrylate-co-methacrylic acid) (PEG-b-P(PrMA-co-MAA) can be complexed with poly(amido amine) (PAMAM) dendrimers and nucleic acids to form pH-responsive nanosized core-shell type polyion complex micelles (PICMs). These PICMs have the ability to lose their shell and release the PAMAM/nucleic acid core under mildly acidic conditions such as those encountered in the endosomal compartment. In this work, pH-sensitive PICMs composed of PEG-b-P(PrMA-co-MAA), different PAMAMs, and siRNAs were prepared and characterized. These micelles had mean diameters ranging from 50 to 100 nm depending on the structure of the polycationic component. In order to trigger PICM uptake by receptor-mediated endocytosis, the micelles were decorated with an antibody fragment directed against the transferrin receptor (anti-CD71). The targeting ligand was stably conjugated to a semi-telechelic amino-PEG-b-P(PrMA-co-MAA) via a maleimide/activated ester bifunctional linker, yielding up to 60%-80% functionalization of the maleimide groups. The cellular uptake of the micelles was assessed on human prostate cancer cells (PC-3) via flow cytometry. Native PICMs and micelles bearing a non-specific antibody fragment were taken up to the same extent with a low efficiency, whereas anti-CD71 Fab'-decorated PICMs exhibited significantly higher uptake. The capacity of the targeted, siRNA-loaded, PICMs to downregulate the expression of the Bcl-2 anti-apoptotic oncoprotein was investigated using the appropriate unmodified or 2'-modified (2'F-RNA and 2'F-ANA) siRNA sequence. Bcl-2 mRNA and protein levels were greatly reduced when the cells were transfected with anti-CD71 decorated PICMs. Optimal silencing was achieved with the chemically modified siRNA. These data suggest that combining optimized siRNA chemistry with an effective delivery system can potentiate the activity of siRNA, thereby potentially reducing the total dose of carrier required to achieve a pharmacological effect.
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Affiliation(s)
- Arnaud E Felber
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich, Wolfgang-Pauli Str. 10, 8093 Zurich, Switzerland
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65
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Albertazzi L, Storti B, Marchetti L, Beltram F. Delivery and subcellular targeting of dendrimer-based fluorescent pH sensors in living cells. J Am Chem Soc 2010; 132:18158-67. [PMID: 21141854 DOI: 10.1021/ja105689u] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Synthesis and targeted delivery of dendrimer-based fluorescent biosensors in living HeLa cells are reported. Following electroporation dendrimers are shown to display specific subcellular localization depending on their size and surface charge and this property is preserved when they are functionalized with sensing moieties. We analyze the case of double dendrimer conjugation with pH-sensitive and pH-insensitive molecules leading to the realization of ratiometric pH sensors that are calibrated in vitro and in living cells. By tuning the physicochemical properties of the dendrimer scaffold sensors can be targeted to specific cellular compartments allowing selective pH measurements in different organelles in living cells. In order to demonstrate the modularity of this approach we present three different pH sensors with tuned H(+) affinity by appropriately choosing the pH-sensitive dye. We argue that the present methodology represents a general approach toward the realization of targetable ratiometric sensors suitable to monitor biologically relevant ions or molecules in living cells.
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Affiliation(s)
- Lorenzo Albertazzi
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, 56127 Pisa, Italy.
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66
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Borowska K, Laskowska B, Magoń A, Mysliwiec B, Pyda M, Wołowiec S. PAMAM dendrimers as solubilizers and hosts for 8-methoxypsoralene enabling transdermal diffusion of the guest. Int J Pharm 2010; 398:185-9. [PMID: 20655371 DOI: 10.1016/j.ijpharm.2010.07.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 07/08/2010] [Accepted: 07/13/2010] [Indexed: 11/19/2022]
Abstract
PAMAM dendrimers form host-guest complexes with 8-methoxypsoralene (8-MOP) - the photosensitizer for PUVA therapy. The stoichiometry of complexes was studied by (1)H NMR spectroscopy in solution and by differential scanning calorimetry in neat mixtures containing 8-MOP and dendrimers of generations G2.5, G3, G3.5, and G4. The dendrimers showed solubilization effect for 8-MOP resulting in increase of 8-MOP concentration in methanol up to 15 molecules of 8-MOP per G2.5 and G3 and 30 molecules of 8-MOP per G3.5, and G4. Isolation of oily host-guest complexes containing 3 or 7 molecules of 8-MOP per G3 and G4, respectively corroborate well with DSC results; glass transition temperature of neat host-guest complexes increases with number of host molecules in comparison with G3 or G4, until the capacity of host is exceeded. The oily host-guest complexes of stoichiometry 3:1 and 7:1 of 8-MOP to G3 and G4, respectively are well soluble in water. The 3:1 host-guest complexes diffused slowly through polyvinyldifluoride and pig ear skin membranes, when released from o/w emulsion. The host-guest complex 8-MOP-G3 was proposed as convenient formulation for psoralene skin administration in PUVA therapy.
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Affiliation(s)
- Katarzyna Borowska
- Department of Cosmetology, University of Information Technology and Management in Rzeszów, 35-225 Rzeszów, Poland
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67
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Zhao Y, Liu S, Jiang W, Chang Y, Li Y, Fang X, Wang J. Synthesis and photoluminescence study of di-dendron dendrimers derived from mono-Boc-protected ethylenediamine cores. LUMINESCENCE 2010; 26:264-70. [PMID: 20641045 DOI: 10.1002/bio.1223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2010] [Revised: 04/06/2010] [Accepted: 05/19/2010] [Indexed: 11/11/2022]
Abstract
This work is focused on the synthesis and optical properties of cone-shaped structural feature di-dendron polyamidoamine dendrimers up to the third generation with mono-Boc-protected ethylenediamine (EDA) as a core. Strong UV absorbance spectra and fluorescence spectra from di-dendron dendrimers with different terminal groups (-NH(2), -COOCH(3)) were studied under different conditions by varying experimental parameters such as concentration and pH. The optical density and fluorescence intensities increased when di-dendron dendrimers generation number increased from 0.5 to 3.0. It was confirmed that the concentration of di-dendron dendrimers plays an important role in fluorescence intensity. The increase in fluorescence intensity was linear in low concentration regions, but the intensity increased slowly in high concentration regions. The results also showed a rapid increase in fluorescence intensity at low pH. The formation of a fluorescence-emitting moiety had a close relationship to protonated tertiary amine groups in di-dendron dendrimers derived from mono-Boc-protected EDA cores. Furthermore, the formation of fluorescent chemical species was irreversible.
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Affiliation(s)
- Yili Zhao
- Alan G. MacDiarmid Institute of Jilin University, Changchun, China
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68
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Suehiro T, Kojima C, Tsumura S, Harada A, Kono K. Higher order structure of short collagen model peptides attached to dendrimers and linear polymers. Biopolymers 2010; 93:640-8. [PMID: 20162722 DOI: 10.1002/bip.21413] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Collagen, which is used as a biomaterial, is the most abundant protein in mammals. We have previously reported that a dendrimer modified with collagen model peptides, (Gly-Pro-Pro)(5), formed a collagen-like triple-helical structure, showing thermal reversibility. In this study, various collagen-mimic dendrimers of different generations and at different binding ratios were synthesized, to investigate the relationship between the peptide clustering effect and the higher order structure formation. The formation of the higher order structure was influenced by the binding ratios of the peptide to the dendrimer, but was not influenced by the dendrimer generation. A spacer, placed between the dendrimer terminal group and the peptide, negatively contributed to the formation of the higher order structure. The collagen model peptides were also attached to poly(allylamine) (PAA) and poly-L-lysine (poly(Lys)) to compare them with the collagen-mimic dendrimers. The PAA-based collagen-mimic compound, bearing more collagen model peptides than the dendrimer, exhibited a thermally stable higher order structure. In contrast, this was not observed for the collagen-mimic polymers based on poly(Lys). Therefore, dendrimers and vinyl polymers act as a scaffold for collagen model peptides and subsequently induce higher order structures.
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Affiliation(s)
- Tomoyuki Suehiro
- Department of Applied Chemistry, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
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69
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Abstract
A divergent fluorous mixture synthesis (FMS) of asymmetric fluorinated dendrimers has been developed. Four generations of fluorinated dendrimers with the same fluorinated moiety were prepared with high efficiency, yield, and purity. Comparison of the physicochemical properties of these dendrimers provided valuable information for their application and future optimization. This strategy has not only provided a practical method for the synthesis and purification of dendrimers, but also established the possibility of utilizing the same fluorinated moiety for FMS.
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Affiliation(s)
- Zhong-Xing Jiang
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, USA
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70
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Microscopic basis for the mesoscopic extensibility of dendrimer-compacted DNA. Biophys J 2010; 98:834-42. [PMID: 20197037 DOI: 10.1016/j.bpj.2009.11.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 10/27/2009] [Accepted: 11/11/2009] [Indexed: 11/23/2022] Open
Abstract
The mechanism of DNA compaction by dendrimers is key to the design of nanotechnologies that can deliver genetic material into cells. We present atomistic simulations, mesoscopic modeling and single-molecule pulling experiments describing DNA dendrimer interactions. All-atom molecular dynamics were used to characterize pulling-force-dependent interactions between DNA and generation-3 PAMAM amine-terminated dendrimers, and a free energy profile and mean forces along the interaction coordinate are calculated. The energy, force, and geometry parameters computed at the atomic level are input for a Monte Carlo model yielding mesoscopic force-extension curves. Actual experimental single-molecule curves obtained with optical tweezers are also presented, and they show remarkable agreement with the virtual curves from our model. The calculations reveal the microscopic origin of the hysteresis observed in the phase transition underlying compaction. A broad range of ionic and pulling parameters is sampled, and suggestions for windows of conditions to probe new single-molecule behavior are made.
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71
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Villaraza AJL, Bumb A, Brechbiel MW. Macromolecules, dendrimers, and nanomaterials in magnetic resonance imaging: the interplay between size, function, and pharmacokinetics. Chem Rev 2010; 110:2921-59. [PMID: 20067234 PMCID: PMC2868950 DOI: 10.1021/cr900232t] [Citation(s) in RCA: 474] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Aaron Joseph L. Villaraza
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ambika Bumb
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Martin W. Brechbiel
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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72
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Albertazzi L, Serresi M, Albanese A, Beltram F. Dendrimer Internalization and Intracellular Trafficking in Living Cells. Mol Pharm 2010; 7:680-8. [DOI: 10.1021/mp9002464] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Lorenzo Albertazzi
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, I-56127 Pisa, Italy, and IIT@NEST, Center for Nanotechnology Innovation, I-56127 Pisa, Italy
| | - Michela Serresi
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, I-56127 Pisa, Italy, and IIT@NEST, Center for Nanotechnology Innovation, I-56127 Pisa, Italy
| | - Alberto Albanese
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, I-56127 Pisa, Italy, and IIT@NEST, Center for Nanotechnology Innovation, I-56127 Pisa, Italy
| | - Fabio Beltram
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, I-56127 Pisa, Italy, and IIT@NEST, Center for Nanotechnology Innovation, I-56127 Pisa, Italy
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73
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Harada A, Yuzawa A, Kato T, Kojima C, Kono K. Effect of pH and generation of dendron on single-step synthesis of gold nanoparticles using PEGylated polyamidoamine dendron in aqueous medium. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.23901] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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74
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Bogdan N, Vetrone F, Roy R, Capobianco JA. Carbohydrate-coated lanthanide-doped upconverting nanoparticles for lectin recognition. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01617a] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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75
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Kim MH, Kino-oka M, Taya M. Designing culture surfaces based on cell anchoring mechanisms to regulate cell morphologies and functions. Biotechnol Adv 2010; 28:7-16. [DOI: 10.1016/j.biotechadv.2009.08.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2009] [Revised: 07/28/2009] [Accepted: 08/01/2009] [Indexed: 12/11/2022]
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76
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Moussodia RO, Balan L, Merlin C, Mustin C, Schneider R. Biocompatible and stable ZnOquantum dots generated by functionalization with siloxane-core PAMAM dendrons. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b917629b] [Citation(s) in RCA: 131] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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77
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78
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Lee KR, Kang IJ. Effects of dopamine concentration on energy transfer between dendrimer–QD and dye-labeled antibody. Ultramicroscopy 2009; 109:894-8. [DOI: 10.1016/j.ultramic.2009.03.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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79
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Pöhlmann C, Humenik M, Sprinzl M. Detection of bacterial 16S rRNA using multivalent dendrimer-reporter enzyme conjugates. Biosens Bioelectron 2009; 24:3383-6. [DOI: 10.1016/j.bios.2009.04.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Revised: 04/08/2009] [Accepted: 04/09/2009] [Indexed: 11/24/2022]
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80
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Tomalia DA. Dendrimer‐Based Nanomedicine: Its Impact on Biology, Pharma Delivery, MRI Imaging and Polyvalent Targeted Therapies. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.296.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Donald Andrew Tomalia
- The National Dendrimer & Nanotechnology CenterCentral Michigan UniversityMt. PleasantMI
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81
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Humenik M, Pöhlmann C, Wang Y, Sprinzl M. Enhancement of electrochemical signal on gold electrodes by polyvalent esterase-dendrimer clusters. Bioconjug Chem 2009; 19:2456-61. [PMID: 19053301 DOI: 10.1021/bc800353z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
5'-Maleimide-oligodeoxynucleotide was conjugated with single sulfhydryl group of cystamine core poly(amidoamine) dendrimers of different generations. Amino groups on the dendrimer moiety were modified with maleimide and coupled to the cysteine 118 of esterase 2 from Alicyclobacillus acidocaldarius in a site-specific manner. Polyvalent esterase-dendrimer-oligodeoxynucleotide clusters were hybridized to capture oligodeoxynucleotides immobilized on a gold electrode. The amperometric signal of p-aminophenol was detected following the esterase-catalyzed hydrolysis of p-aminophenylbutyrate. The multiple anchoring of the esterase reporter via generation 3-and generation 5-derived clusters exhibited 10- and 100-fold signal enhancement, respectively, as compared to monovalent esterase-oligonucleotide conjugate. The polyvalent and monovalent reporters were comparable in their abilities regarding mismatch discrimination.
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Affiliation(s)
- Martin Humenik
- Laboratorium für Biochemie, Universität Bayreuth, Universitätstrasse 30, 95440 Bayreuth, Germany
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82
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Harada A, Nakanishi K, Ichimura S, Kojima C, Kono K. Spontaneous formation of narrowly‐distributed self‐assembly from polyamidoamine dendron‐poly(
L
‐lysine) block copolymers through helix‐coil transition of poly(
L
‐lysine) block. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23231] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Atsushi Harada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1‐1 Gakuen‐cho, Naka‐ku, Sakai, Osaka 599‐8531, Japan
| | - Kenichi Nakanishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1‐1 Gakuen‐cho, Naka‐ku, Sakai, Osaka 599‐8531, Japan
| | - Shinichi Ichimura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1‐1 Gakuen‐cho, Naka‐ku, Sakai, Osaka 599‐8531, Japan
| | - Chie Kojima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1‐1 Gakuen‐cho, Naka‐ku, Sakai, Osaka 599‐8531, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1‐1 Gakuen‐cho, Naka‐ku, Sakai, Osaka 599‐8531, Japan
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83
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Zhang W, Lalwani S, Chouai A, Simanek EE. Synthesis and Characterization of Anionic Triazine Dendrimers with a Labile Disulfide Core. Isr J Chem 2009; 49:23-30. [PMID: 19936277 PMCID: PMC2780346 DOI: 10.1560/ijc.49.1.23] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Anionic dendrimers based on melamine with disulfide bonds at the core were prepared to investigate the solubility of these architectures, the ability of these molecules to solubilize pyrene as a model drug, and the ability of these architectures to undergo thiol-disulfide exchange. The ability to solubilize pyrene is directly correlated with molecular weight of the dendrimer-aggregation of dendrons does not occur. Thiol-disulfide exchange occurs rapidly using dithiothreitol as the reductant to yield dendrimers with thiol cores that can undergo oxidation in air to yield the original dendrimer.
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Affiliation(s)
- Wen Zhang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Sanjiv Lalwani
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Abdellatif Chouai
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Eric E. Simanek
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
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84
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Enrichment of undifferentiated mouse embryonic stem cells on a culture surface with a glucose-displaying dendrimer. Biomaterials 2008; 29:4236-43. [DOI: 10.1016/j.biomaterials.2008.07.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Accepted: 07/18/2008] [Indexed: 12/20/2022]
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85
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Functionalization of PAMAM dendrimers with [RuIII(edta)(H2O)]−. Nitric Oxide 2008; 19:245-51. [DOI: 10.1016/j.niox.2008.04.027] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Revised: 03/27/2008] [Accepted: 04/29/2008] [Indexed: 11/21/2022]
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86
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Feng X, Taton D, Ibarboure E, Chaikof EL, Gnanou Y. Janus-type dendrimer-like poly(ethylene oxide)s. J Am Chem Soc 2008; 130:11662-76. [PMID: 18681431 PMCID: PMC2723772 DOI: 10.1021/ja7103119] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A straightforward and original methodology allowing the synthesis of Janus-type dendrimer-like poly(ethylene oxide)s (PEOs) carrying orthogonal functional groups on their surface is described. The use of 3-allyloxy-1,2-propanediol (1) as a latent AB2-type heterofunctional initiator of anionic ring-opening polymerization (AROP) of ethylene oxide (EO) and of selective branching agents of PEO chain ends served to construct the two dendrons of these dendrimer-like PEOs, following a divergent pathway. Thus, the first PEO generation of the first dendron was grown by AROP from 1 followed by the reaction of the corresponding alpha-allyl,omega,omega'-bishydroxy- heterofunctional PEO derivative with 2-(3'-chloromethybenzyloxymethyl)-2-methyl-5,5-dimethyl-1,3-dioxane (2) used as a branching agent. This afforded the dendron A with four latent peripheral hydroxyls protected in the form of two ketal rings. The remaining alpha-allylic double bond of the PEO thus prepared was transformed into two hydroxyl groups using OsO4 in order to create the first PEO generation of the dendron B by AROP of EO. Allyl chloride (3) was then used as another (latent) branching agent to react with the terminal hydroxyl of the corresponding PEO chains. Deprotection under acidic conditions of the ketal groups of dendron A, followed by AROP of EO, afforded the second PEO generation on this face. This alternate and divergent procedure, combining AROP of EO and selective branching of PEO branches, could be readily iterated, one dendron after the other up to the generation six, leading to a Janus-type dendrimer-like PEO exhibiting a total mass of around 300 kg/mol and possessing 64 peripheral groups on each face. The possibility of orthogonal functionalization of the surfaces of such Janus-type dendritic PEOs was exploited. Indeed, a dendron of generation 4 was functionalized with hydroxyl functions at its periphery, whereas the other was end-capped with either tertiary amino or disulfide groups. In a variant of this strategy, azido groups and acetylene could also be orthogonally introduced at the periphery of the fourth generation Janus-type dendrimer-like PEO and subjected to polycondensation by a 1,3-dipolar cycloaddition reaction. This afforded a necklace-like covalent assembly of dendrimer-like PEOs through the formation of stable [1,2,3]-triazole linkages.
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Affiliation(s)
- Xiaoshuang Feng
- Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, ENSCPB 16, Avenue Pey Berland, 33607 Pessac cedex, France
| | - Daniel Taton
- Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, ENSCPB 16, Avenue Pey Berland, 33607 Pessac cedex, France
| | - Emmanuel Ibarboure
- Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, ENSCPB 16, Avenue Pey Berland, 33607 Pessac cedex, France
| | - Elliot L. Chaikof
- Laboratory for Biomolecular Materials Research, Department of Surgery, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Yves Gnanou
- Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, ENSCPB 16, Avenue Pey Berland, 33607 Pessac cedex, France
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87
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Kose MM, Yesilbag G, Sanyal* A. Segment Block Dendrimers via Diels−Alder Cycloaddition. Org Lett 2008; 10:2353-6. [DOI: 10.1021/ol800553t] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Merve Kose
- Bogazici University, Chemistry Department, 34342 Bebek, Istanbul, Turkey
| | - Gulen Yesilbag
- Bogazici University, Chemistry Department, 34342 Bebek, Istanbul, Turkey
| | - Amitav Sanyal*
- Bogazici University, Chemistry Department, 34342 Bebek, Istanbul, Turkey
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88
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Li X, Kroeger A, Azzam T, Eisenberg A. Dendrimer influenced supramolecular structure formation of block copolymers: II. Dendrimer concentration dependence. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:2705-2711. [PMID: 18237205 DOI: 10.1021/la702614x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The dendrimer concentration dependence of the supramolecular structure formation of polystyrene-block-poly(acrylic acid) in dioxane/THF was investigated as a function of water content. The distribution as well as the localization of the dendrimer units inside the formed aggregates were determined by comparative studies of turbidity measurements and transmission electron microscopy. The strong and specific interactions present between the amine groups of the dendrimer (PAMAM) and the carboxylic acid residues of PAA in the copolymer have a strong influence on the structure formation. The PAMAM concentration as well as the character of the terminal groups of the dendrimer influence the strength of these interactions and consequently affect the structure formation process. As shown by fluorescence quenching experiments, on all supramolecular hierarchical structure levels, and specifically in vesicles, the dendrimer is coated by the PAA chains of the block copolymer due to the strong interactions; since the PAA blocks are connected to the PS blocks, which form the corona, the dendrimer is surrounded by PS chains and is thus encapsulated into the hydrophobic regions of the block copolymer aggregates. A high-resolution transmission electron microscopy image of a micelle is shown, in which the individual dendrimer cores are seen to be localized in the center of these aggregates, and thus, the structure proposed in the previous publication (Kroeger, A.; Li, X.; Eisenberg, A. Langmuir 2007, 23, 10732) is confirmed. Furthermore, the sizes of the resulting aggregates depend on the relative concentration of dendrimer, expressed as RAm/Ac (the ratio of amine to acid groups). With increasing RAm/Ac values, not only the sizes of the micelles but also the vesicle dimensions, especially vesicle wall thicknesses, increase, and this effect suggests the encapsulation of the dendrimer into the vesicle walls. Thus, the constitution of the vesicle structure is determined precisely. This feature allows the potential incorporation of a wide range of species into the vesicle walls or the center of the micelle cores.
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Affiliation(s)
- Xingfu Li
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 2K6, Canada
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89
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Ohori R, Uchida K, Saito A, Yajima H. Poly(ethylene glycol)-mediated Steric Stabilization of Complexes Formed between Negatively Charged Liposomes and Folate-conjugated Poly(amidoamine) Dendrimers in Water. CHEM LETT 2008. [DOI: 10.1246/cl.2008.324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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90
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Wood KC, Azarin SM, Arap W, Pasqualini R, Langer R, Hammond PT. Tumor-targeted gene delivery using molecularly engineered hybrid polymers functionalized with a tumor-homing peptide. Bioconjug Chem 2008; 19:403-5. [PMID: 18189340 DOI: 10.1021/bc700408r] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Before gene therapy can be used in clinical settings, safe and efficient DNA delivery systems must be developed to overcome a range of extra- and intracellular transport barriers. As a step toward the development of a modular, multifunctional gene delivery system to overcome these diverse barriers, we have developed a family of linear-dendritic "hybrid" polymers which contain functionalities for tissue targeting, minimization of nonspecific interactions, endosomal buffering, and DNA binding. Here, we demonstrate the rapid three-step, room-temperature, aqueous synthesis of hybrid polymers, as well as the functionalization of these polymers with a peptide targeting ligand that specifically binds to glucose-regulated protein-78 kDa (GRP-78), a clinically relevant tumor antigen identified in human cancer patients. These polymer systems can condense plasmid DNA into small nanoparticle structures (<210 nm) and transfect cells expressing GRP-78 with efficiencies that exceed that of branched polyethylenimine (bPEI), one of the best commercially available polymers for in vitro transfections. The synthetic approach described here may be useful for the rapid synthesis and optimization of polymer gene delivery systems bearing a range of diverse functional domains, and the specific GRP-78-targeted systems developed in this study may potentially have clinical applications in cancer gene therapy.
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Affiliation(s)
- Kris C Wood
- Department of Chemical Engineering, Biological Engineering Division, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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91
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Newkome GR, Shreiner CD. Poly(amidoamine), polypropylenimine, and related dendrimers and dendrons possessing different 1→2 branching motifs: An overview of the divergent procedures. POLYMER 2008. [DOI: 10.1016/j.polymer.2007.10.021] [Citation(s) in RCA: 313] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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92
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Trinchi A, Muster TH. A Review of Surface Functionalized Amine Terminated Dendrimers for Application in Biological and Molecular Sensing. Supramol Chem 2007. [DOI: 10.1080/10610270601120363] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Adrian Trinchi
- a CSIRO Manufacturing and Materials Technology , Graham Road, Highett, Melbourne, Vic., 3190, Australia
| | - Tim H. Muster
- a CSIRO Manufacturing and Materials Technology , Graham Road, Highett, Melbourne, Vic., 3190, Australia
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93
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Kroeger A, Li X, Eisenberg A. Dendrimer-influenced supramolecular structure formation of block copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:10732-40. [PMID: 17824625 DOI: 10.1021/la701334r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The water content-dependent supramolecular structure formation of polystyrene-block-poly(acrylic acid) (PS-b-PAA) copolymer in the presence of a fourth-generation amine-terminated poly(amido amine) dendrimer (PAMAM) is investigated by dynamic light scattering, turbidity measurements, and transmission electron microscopy. The solvent system for this study is a mixture of dioxane/THF and water. A very complex turbidity profile is observed with increasing water content in the system and is explained by the presence of various aggregated structures based on strong interactions between the amine-containing dendrimers and the poly(acrylic acid) blocks of the polymer. The onset of the self-assembly of single chains of PS-b-PAA (primary structure) into single and multiple dendrimer core inverse micelles (secondary structure) is detected as very low water contents of cw < 2% wt (cwc). These micelles consist of dendrimers coated with PAA blocks, which are connected to the corresponding PS chains that form the corona. Further addition of water leads to an association of these micelles into compound multiple dendrimer core inverse micelles (tertiary structure) in the range of cw = approximately 6 to approximately 10% wt. At still higher water content, some of the acrylic acid chains of the block copolymer move from the vicinity of the dendrimer to the outside of the aggregates, resulting in a decrease in the size of the formed structures and the acquisition of progressively increasing hydrophilic character of the aggregates. Multiple dendrimer core inverse onion micelles are formed, which agglomerate into compound multiple dendrimer core inverse onion micelles at cw = approximately 12 to approximately 18% wt. Above this water content, vesicular structures are formed. The complexity is unusual for block copolymer systems and illustrates the importance of strong interactions in structure formation.
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Affiliation(s)
- Anja Kroeger
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6, Canada
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94
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Paulo PMR, Lopes JNC, Costa SMB. Molecular dynamics simulations of charged dendrimers: low-to-intermediate half-generation PAMAMs. J Phys Chem B 2007; 111:10651-64. [PMID: 17705526 DOI: 10.1021/jp072211x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have performed atomistic molecular dynamics simulations of PAMAM dendrimers of generations 0.5, 1.5, 2.5, 3.5, and 4.5. The simulated systems comprise the charged dendrimer and its counterions embedded in a dielectric continuum (i.e., without explicit solvent). Structural properties of these dendrimers, like the radius of gyration, the principal moments of inertia, and the segment density profiles, were evaluated from the simulations. The average radius of gyration obtained for the intermediate half-generations 2.5, 3.5, and 4.5 follows the same scaling law that was previously inferred from simulations of full-generation PAMAMs, Rg approximately M1/3, and is characteristic of space-filling objects. The low half-generations 0.5 and 1.5 deviate, however, to greater Rg values. The shape of the smaller dendrimers is approximately that of a prolate ellipsoid, which becomes more spherical for higher generations. The segment density profiles show features identical to those obtained in other simulations of flexible-chain dendrimers, like dendron-backfolding. Two slightly different configurations, in terms of size and shape, were identified for generation 2.5. The radial distributions of counterions extracted from the simulations compare well with the solutions of Poisson-Boltzmann cell model, and the dendrimer's effective charge was estimated using the Bjerrum criterion. The influence of electrostatic interactions in the dendrimer's conformation due to repulsion between the charged end-groups and its relation to counterion effects is discussed for the several generations simulated. The form factors calculated from the simulations are compared with the model of a homogeneous ellipsoid of revolution. The overall results are in agreement with the previously established morphological transition of PAMAM dendrimers toward a more spherical and compact conformation above generations 3 or 4.
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Affiliation(s)
- Pedro M R Paulo
- Centro de Química Estrutural-Complexo 1, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
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95
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Castillo R, Izquierdo ML, Alvarez-Builla J. Pyridinium N-heteroarylaminides: synthesis of N-heteroaryltetramines based on 1,6-bis(phenoxy)hexane and 1,3-bis(phenoxymethyl)benzene. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.06.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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96
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Tomalia DA, Reyna LA, Svenson S. Dendrimers as multi-purpose nanodevices for oncology drug delivery and diagnostic imaging. Biochem Soc Trans 2007; 35:61-7. [PMID: 17233602 DOI: 10.1042/bst0350061] [Citation(s) in RCA: 393] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Dendrimers are routinely synthesized as tuneable nanostructures that may be designed and regulated as a function of their size, shape, surface chemistry and interior void space. They are obtained with structural control approaching that of traditional biomacromolecules such as DNA/RNA or proteins and are distinguished by their precise nanoscale scaffolding and nanocontainer properties. As such, these important properties are expected to play an important role in the emerging field of nanomedicine. This review will describe progress on the use of these features for both targeted diagnostic imaging and drug-delivery applications. Recent efforts have focused on the synthesis and pre-clinical evaluation of a multipurpose STARBURST PAMAM (polyamidoamine) dendrimer prototype that exhibits properties suitable for use as: (i) targeted, diagnostic MRI (magnetic resonance imaging)/NIR (near-IR) contrast agents, (ii) and/or for controlled delivery of cancer therapies. Special emphasis will be placed on the lead candidate, namely [core: 1,4-diaminobutane; G (generation)=4.5], [dendri-PAMAM(CO(2)Na)(64)]. This dendritic nanostructure (i.e. approximately 5.0 nm diameter) was selected on the basis of a very favourable biocompatibility profile [The Nanotechnology Characterization Laboratory (NCL), an affiliate of the National Cancer Institute (NCI), has completed extensive in vitro studies on the lead compound and have found it to be very benign, non-immunogenic and highly biocompatible], the expectation that it will exhibit desirable mammalian kidney excretion properties and demonstrated targeting features.
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Affiliation(s)
- D A Tomalia
- Dendritic Nanotechnologies Inc., 2625 Denison Drive, Mt. Pleasant, MI 48858, USA.
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97
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Kim MH, Kino-Oka M, Kawase M, Yagi K, Taya M. Response of human epithelial cells to culture surfaces with varied roughnesses prepared by immobilizing dendrimers with/without D-glucose display. J Biosci Bioeng 2007; 103:192-9. [PMID: 17368404 DOI: 10.1263/jbb.103.192] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2006] [Accepted: 12/01/2006] [Indexed: 11/17/2022]
Abstract
To investigate the response of human epithelial cells to substrates with nanoscale modifications, dendrimer-immobilized surfaces were prepared with or without D-glucose displayed as a terminal ligand, giving topographic structures with mean roughnesses (R(a)) of 1.8-11.0 nm. With an increase in the R(a) value up to 4.0 nm, the epithelial cells cultured on naked dendrimer surface without D-glucose display were somewhat stretched in their morphology compared with those on a nonmodified plain surface. However, for the R(a) values higher than 4.0 nm, such cell stretching was inhibited, resulting in the predominant existence of round-shaped cells. The change in cell morphology was appreciable on the surfaces with D-glucose-displayed dendrimers. When the R(a) value increased up to 4.5 nm on these surfaces, in particular, the enhancement of cell stretching was recognized, and fluorescence microscopic observation supported the hypothesis that the glucose-transporter-mediated adhesion of cells to the surface encouraged the development of filopodia and stress fibers, thereby improving focal contact with the surface. Our results suggest that the combination of displaying D-glucose and modulating roughness can promote cytoskeletal formation accompanied by marked cell elongation on culture surfaces.
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Affiliation(s)
- Mee-Hae Kim
- Department of Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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98
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Lo SC, Burn PL. Development of Dendrimers: Macromolecules for Use in Organic Light-Emitting Diodes and Solar Cells. Chem Rev 2007; 107:1097-116. [PMID: 17385927 DOI: 10.1021/cr050136l] [Citation(s) in RCA: 516] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shih-Chun Lo
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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99
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Fernandez L, Gonzalez M, Cerecetto H, Santo M, Silber JJ. Solubilization and Release Properties of Dendrimers. Evaluation as Prospective Drug Delivery Systems. Supramol Chem 2007. [DOI: 10.1080/10610270601012776] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Luciana Fernandez
- a Departamento de Química , Universidad Nacional de Río Cuarto , Agencia Postal Nro 3, 5800, Río Cuarto, Argentina
| | - Mercedes Gonzalez
- c Departamento de Química Orgánica , Facultad de Química—Facultad de Ciencias, Universidad de la República , Iguá 4225, 11400, Montevideo, Uruguay
| | - Hugo Cerecetto
- c Departamento de Química Orgánica , Facultad de Química—Facultad de Ciencias, Universidad de la República , Iguá 4225, 11400, Montevideo, Uruguay
| | - Marisa Santo
- b Departamento de Física , Universidad Nacional de Río Cuarto , Agencia Postal Nro 3, 5800, Río Cuarto, Argentina
| | - Juana J. Silber
- c Departamento de Química Orgánica , Facultad de Química—Facultad de Ciencias, Universidad de la República , Iguá 4225, 11400, Montevideo, Uruguay
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100
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