51
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Chloramphenicol-based poly(ester-ether)urethane bioconjugates with antibacterial properties for biomedical applications. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2064-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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52
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Wuttke S, Lismont M, Escudero A, Rungtaweevoranit B, Parak WJ. Positioning metal-organic framework nanoparticles within the context of drug delivery – A comparison with mesoporous silica nanoparticles and dendrimers. Biomaterials 2017; 123:172-183. [DOI: 10.1016/j.biomaterials.2017.01.025] [Citation(s) in RCA: 190] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 12/12/2016] [Accepted: 01/22/2017] [Indexed: 11/25/2022]
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53
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Roushani M, Shahdost-Fard F. Ultra-sensitive detection of ibuprofen (IBP) by electrochemical aptasensor using the dendrimer-quantum dot (Den-QD) bioconjugate as an immobilization platform with special features. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:1091-1096. [PMID: 28415394 DOI: 10.1016/j.msec.2017.03.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 12/03/2016] [Accepted: 03/02/2017] [Indexed: 01/26/2023]
Abstract
This study describes a high-performance electrochemical aptasensor which is employed to detect Ibuprofen (IBP) as a painkiller drug by using a novel platform as an integrated sensing interface. In order to make the aptasensor, the Den-QD bioconjugate was immobilized on the surface of a GC electrode and followed the Apt was incubated on this surface. The incubation of the IBP on the aptasensor surface and the formation of the Apt/IBP complex, led to a hindered electron transfer reaction on the sensing surface, which decreased the peak current of the redox probe. Under the optimum condition, the assay had two dynamic ranges with a detection limit down to 333fM. The developed aptasensor reliably detects IBP in a real sample. Our results demonstrated that the proposed strategy has many advantages and the Den-QD bioconjugate may become a promising nanocomposite for the electrochemical sensing applications.
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54
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Kéri M, Nagy Z, Novák L, Szarvas E, Balogh LP, Bányai I. Beware of phosphate: evidence of specific dendrimer–phosphate interactions. Phys Chem Chem Phys 2017; 19:11540-11548. [DOI: 10.1039/c7cp00875a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
G5 PAMAM dendrimers interact with phosphate ions by forming H-bonds with tertiary amino groups in neutral medium.
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Affiliation(s)
- Mónika Kéri
- Department of Physical Chemistry
- University of Debrecen
- Hungary
| | - Zoltán Nagy
- Department of Physical Chemistry
- University of Debrecen
- Hungary
| | - Levente Novák
- Department of Physical Chemistry
- University of Debrecen
- Hungary
| | - Edit Szarvas
- Department of Physical Chemistry
- University of Debrecen
- Hungary
| | | | - István Bányai
- Department of Physical Chemistry
- University of Debrecen
- Hungary
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55
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Bayir E, Bilgi E, Urkmez AS. Implementation of Nanoparticles in Cancer Therapy. PHARMACEUTICAL SCIENCES 2017. [DOI: 10.4018/978-1-5225-1762-7.ch047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Cancer is a wide group of diseases and generally characterized by uncontrolled proliferation of cells whose metabolic activities are disrupted. Conventionally, chemotherapy, radiotherapy, and surgery are used in the treatment of cancer. However, in theory, even a single cancer cell may trigger recurrence. Therefore, these treatments cannot provide high survival rate for deadly types. Identification of alternative methods in treatment of cancers is inevitable because of adverse effects of conventional methods. In the last few decades, nanotechnology developed by scientists working in different disciplines—physics, chemistry, and biology—offers great opportunities. It is providing elimination of both circulating tumor cells and solid cancer cells by targeting cancer cells. In this chapter, inadequate parts of conventional treatment methods, nanoparticle types used in new treatment methods of cancer, and targeting methods of nanoparticles are summarized; furthermore, recommendations of future are provided.
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56
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Perisé-Barrios AJ, Fuentes-Paniagua E, Sánchez-Nieves J, Serramía MJ, Alonso E, Reguera RM, Gómez R, de la Mata FJ, Muñoz-Fernández MÁ. Improved Efficiency of Ibuprofen by Cationic Carbosilane Dendritic Conjugates. Mol Pharm 2016; 13:3427-3438. [DOI: 10.1021/acs.molpharmaceut.6b00420] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ana Judith Perisé-Barrios
- Laboratorio
Inmuno-Biología Molecular, Hospital General Universitario Gregorio Marañón, Spanish HIV HGM BioBank and Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Elena Fuentes-Paniagua
- Departamento
de Química Orgánica y Química Inorgánica,
Campus Universitario, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - Javier Sánchez-Nieves
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
- Departamento
de Química Orgánica y Química Inorgánica,
Campus Universitario, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - M. Jesús Serramía
- Laboratorio
Inmuno-Biología Molecular, Hospital General Universitario Gregorio Marañón, Spanish HIV HGM BioBank and Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain
| | - Esther Alonso
- Laboratorio
Inmuno-Biología Molecular, Hospital General Universitario Gregorio Marañón, Spanish HIV HGM BioBank and Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain
| | - Rosa M. Reguera
- Departamento
de Ciencias Biomédicas, Universidad de León, Campus
de Vegazana s/n, 24071 León, Spain
| | - Rafael Gómez
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
- Departamento
de Química Orgánica y Química Inorgánica,
Campus Universitario, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - F. Javier de la Mata
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
- Departamento
de Química Orgánica y Química Inorgánica,
Campus Universitario, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - M. Ángeles Muñoz-Fernández
- Laboratorio
Inmuno-Biología Molecular, Hospital General Universitario Gregorio Marañón, Spanish HIV HGM BioBank and Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
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57
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Hönzke S, Gerecke C, Elpelt A, Zhang N, Unbehauen M, Kral V, Fleige E, Paulus F, Haag R, Schäfer-Korting M, Kleuser B, Hedtrich S. Tailored dendritic core-multishell nanocarriers for efficient dermal drug delivery: A systematic top-down approach from synthesis to preclinical testing. J Control Release 2016; 242:50-63. [PMID: 27349353 DOI: 10.1016/j.jconrel.2016.06.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 06/16/2016] [Accepted: 06/22/2016] [Indexed: 12/12/2022]
Abstract
Drug loaded dendritic core-multishell (CMS) nanocarriers are of especial interest for the treatment of skin diseases, owing to their striking dermal delivery efficiencies following topical applications. CMS nanocarriers are composed of a polyglycerol core, connected by amide-bonds to an inner alkyl shell and an outer methoxy poly(ethylene glycol) shell. Since topically applied nanocarriers are subjected to biodegradation, the application of conventional amide-based CMS nanocarriers (10-A-18-350) has been limited by the potential production of toxic polyglycerol amines. To circumvent this issue, three tailored ester-based CMS nanocarriers (10-E-12-350, 10-E-15-350, 10-E-18-350) of varying inner alkyl chain length were synthesized and comprehensively characterized in terms of particle size, drug loading, biodegradation and dermal drug delivery efficiency. Dexamethasone (DXM), a potent drug widely used for the treatment of inflammatory skin diseases, was chosen as a therapeutically relevant test compound for the present study. Ester- and amide-based CMS nanocarriers delivered DXM more efficiently into human skin than a commercially available DXM cream. Subsequent in vitro and in vivo toxicity studies identified CMS (10-E-15-350) as the most biocompatible carrier system. The anti-inflammatory potency of DXM-loaded CMS (10-E-15-350) nanocarriers was assessed in TNFα supplemented skin models, where a significant reduction of the pro-inflammatory cytokine IL-8 was seen, with markedly greater efficacy than commercial DXM cream. In summary, we report the rational design and characterization of tailored, biodegradable, ester-based CMS nanocarriers, and their subsequent stepwise screening for biocompatibility, dermal delivery efficiency and therapeutic efficacy in a top-down approach yielding the best carrier system for topical applications.
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Affiliation(s)
- Stefan Hönzke
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität Berlin, Germany
| | - Christian Gerecke
- Institute of Nutritional Science, Department of Toxicology, University of Potsdam, Germany
| | - Anja Elpelt
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität Berlin, Germany
| | - Nan Zhang
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität Berlin, Germany
| | - Michael Unbehauen
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Germany
| | - Vivian Kral
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität Berlin, Germany
| | | | - Florian Paulus
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Germany
| | - Rainer Haag
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Germany
| | | | - Burkhard Kleuser
- Institute of Nutritional Science, Department of Toxicology, University of Potsdam, Germany
| | - Sarah Hedtrich
- Institute for Pharmacy, Pharmacology and Toxicology, Freie Universität Berlin, Germany.
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58
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Yavuz B, Bozdağ Pehlivan S, Sümer Bolu B, Nomak Sanyal R, Vural İ, Ünlü N. Dexamethasone – PAMAM dendrimer conjugates for retinal delivery: preparation, characterization and in vivo evaluation. J Pharm Pharmacol 2016; 68:1010-20. [DOI: 10.1111/jphp.12587] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 05/14/2016] [Indexed: 01/04/2023]
Abstract
Abstract
Objective
Ocular diseases affecting retina, such as diabetic retinopathy (DR), age-related macular degeneration (AMD) and glaucoma are the major causes of blindness, and their treatment is still a challenge due to the special structure of the eye. The purpose of this study was to prepare a sustained release DEX conjugate formulation with enhanced ocular permeation using poly(amidoamine) (PAMAM) dendrimers and to evaluate the effects of conjugation on DEX release and ocular residence time.
Methods
PAMAM G3.5 and PAMAM G4.5 dendrimers were used to prepare DEX conjugates, and conjugation was confirmed using 1H-NMR. Formulations were evaluated in terms of drug release in the presence of ocular enzymes and cytotoxicity on ARPE19 cell lines. Fluorotron analysis was performed and ocular pharmacokinetic properties of DEX–PAMAM conjugates were studied in Sprague Dawley rats following intravitreal and subconjunctival applications.
Key Findings
The results indicated that DEX–PAMAM conjugates were able to enhance ocular permeability and ocular tissue levels of DEX following subconjunctival injection, and results were encouraging when compared to the literature that has reported DEX getting cleared from vitreous in 3 h.
Conclusion
Current studies are focused on formulation improvement to enhance hydrolysis and clearance time.
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Affiliation(s)
- Burçin Yavuz
- Pharmaceutical Technology Department, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Sibel Bozdağ Pehlivan
- Pharmaceutical Technology Department, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | | | | | - İmran Vural
- Pharmaceutical Technology Department, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Nurşen Ünlü
- Pharmaceutical Technology Department, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
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59
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Chang M, Zhang F, Wei T, Zuo T, Guan Y, Lin G, Shao W. Smart linkers in polymer–drug conjugates for tumor-targeted delivery. J Drug Target 2015; 24:475-91. [DOI: 10.3109/1061186x.2015.1108324] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Minglu Chang
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Fang Zhang
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Ting Wei
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Tiantian Zuo
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Yuanyuan Guan
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Guimei Lin
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Wei Shao
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
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60
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Wrońska N, Felczak A, Zawadzka K, Poszepczyńska M, Różalska S, Bryszewska M, Appelhans D, Lisowska K. Poly(Propylene Imine) Dendrimers and Amoxicillin as Dual-Action Antibacterial Agents. Molecules 2015; 20:19330-42. [PMID: 26512634 PMCID: PMC6331957 DOI: 10.3390/molecules201019330] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 10/14/2015] [Accepted: 10/16/2015] [Indexed: 12/29/2022] Open
Abstract
Besides acting as antimicrobial compounds, dendrimers can be considered as agents that improve the therapeutic effectiveness of existing antibiotics. In this work we present a new approach to using amoxicillin (AMX) against reference strains of common Gram-negative pathogens, alone and in combination with poly(propylene imine) (PPI) dendrimers, or derivatives thereof, in which 100% of the available hydrogen atoms are substituted with maltose (PPI 100%malG3). The concentrations of dendrimers used remained in the range non-toxic to eukaryotic cells. The results indicate that PPI dendrimers significantly enhance the antibacterial effect of amoxicillin alone, allowing antibiotic doses to be reduced. It is important to reduce doses of amoxicillin because its widespread use in medicine could lead to the development of bacterial resistance and environmental pollution. This is the first report on the combined antibacterial activity of PPI surface-modified maltose dendrimers and amoxicillin.
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Affiliation(s)
- Natalia Wrońska
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha Street, 90-237 Lodz, Poland.
| | - Aleksandra Felczak
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha Street, 90-237 Lodz, Poland.
| | - Katarzyna Zawadzka
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha Street, 90-237 Lodz, Poland.
| | - Martyna Poszepczyńska
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha Street, 90-237 Lodz, Poland.
| | - Sylwia Różalska
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha Street, 90-237 Lodz, Poland.
| | - Maria Bryszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 141/143, Pomorska Street, 90-236 Lodz, Poland.
| | - Dietmar Appelhans
- Leibniz Institute of Polymer Research Dresden, Hohe Street 6, 01069 Dresden, Germany.
| | - Katarzyna Lisowska
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha Street, 90-237 Lodz, Poland.
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61
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Lee SH, Lee JB, Bae MS, Balikov DA, Hwang A, Boire TC, Kwon IK, Sung HJ, Yang JW. Current progress in nanotechnology applications for diagnosis and treatment of kidney diseases. Adv Healthc Mater 2015; 4:2037-45. [PMID: 26121684 PMCID: PMC4874338 DOI: 10.1002/adhm.201500177] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 04/27/2015] [Indexed: 12/26/2022]
Abstract
Significant progress has been made in nanomedicine, primarily in the form of nanoparticles, for theranostic applications to various diseases. A variety of materials, both organic and inorganic, have been used to develop nanoparticles with promise to achieve improved efficacy in medical applications as well as reduced systemic side effects compared to current standard of care medical practices. In particular, this article highlights the recent development and application of nanoparticles for diagnosing and treating nephropathologies.
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Affiliation(s)
- Sue Hyun Lee
- Department of Biomedical Engineering, School of Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Jung Bok Lee
- Department of Biomedical Engineering, School of Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Min Soo Bae
- Department of Bioengineering, College of Engineering, University of Washington, Seattle, WA 98195, USA
| | - Daniel A. Balikov
- Department of Biomedical Engineering, School of Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Amy Hwang
- Department of Biomedical Engineering, School of Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Timothy C. Boire
- Department of Biomedical Engineering, School of Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Il Keun Kwon
- Department of Maxillofacial Biomedical Engineering and Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul 130–701, Republic of Korea
| | - Hak-Joon Sung
- Department of Biomedical Engineering, School of Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Jae Won Yang
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37235, USA
- Department of Internal Medicine, Yonsei University of Wonju College of Medicine, Wonju, Gangwon 220–701, Republic of Korea
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62
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Oledzka E, Sawicka A, Sobczak M, Nalecz-Jawecki G, Skrzypczak A, Kolodziejski W. Prazosin-Conjugated Matrices Based on Biodegradable Polymers and α-Amino Acids--Synthesis, Characterization, and in Vitro Release Study. Molecules 2015; 20:14533-51. [PMID: 26274943 PMCID: PMC6332215 DOI: 10.3390/molecules200814533] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 07/24/2015] [Accepted: 08/05/2015] [Indexed: 11/16/2022] Open
Abstract
Novel and promising macromolecular conjugates of the α1-adrenergic blocker prazosin were directly synthesized by covalent incorporation of the drug to matrices composed of biodegradable polymers and α-amino acids for the development of a polymeric implantable drug delivery carrier. The cyto- and genotoxicity of the synthesized matrices were evaluated using a bacterial luminescence test, protozoan assay, and Salmonella typhimurium TA1535. A new urethane bond was formed between the hydroxyl end-groups of the synthesized polymer matrices and an amine group of prazosin, using 1,1'-carbonyldiimidazole (CDI) as a coupling agent. The structure of the polymeric conjugates was characterized by various spectroscopy techniques. A study of hydrogen nuclear magnetic resonance ((1)H-NMR) and differential scanning calorimetry (DSC) thermodiagrams indicated that the presence of prazosin pendant groups in the macromolecule structures increased the polymer's rigidity alongside increasing glass transition temperature. It has been found that the kinetic release of prazosin from the obtained macromolecular conjugates, tested in vitro under different conditions, is strongly dependent on the physicochemical properties of polymeric matrices. Furthermore, the presence of a urethane bond in the macromolecular conjugates allowed for obtaining a relatively controlled release profile of the drug. The obtained results confirm that the pharmacokinetics of prazosin might be improved through the synthesis of polymeric conjugates containing biomedical polymers and α-amino acids in the macromolecule.
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Affiliation(s)
- Ewa Oledzka
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy with the Laboratory Medicine Division, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland.
| | - Anna Sawicka
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy with the Laboratory Medicine Division, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland.
| | - Marcin Sobczak
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy with the Laboratory Medicine Division, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland.
| | - Grzegorz Nalecz-Jawecki
- Department of Environmental Health Science, Faculty of Pharmacy with the Laboratory Medicine Division, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland.
| | - Agata Skrzypczak
- Department of Environmental Health Science, Faculty of Pharmacy with the Laboratory Medicine Division, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland.
| | - Waclaw Kolodziejski
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy with the Laboratory Medicine Division, Medical University of Warsaw, Banacha 1, Warsaw 02-097, Poland.
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63
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Bielski ER, Zhong Q, Brown M, da Rocha SRP. Effect of the Conjugation Density of Triphenylphosphonium Cation on the Mitochondrial Targeting of Poly(amidoamine) Dendrimers. Mol Pharm 2015; 12:3043-53. [PMID: 26158804 DOI: 10.1021/acs.molpharmaceut.5b00320] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Many clinically relevant diseases with known poor therapeutic outcomes, including cancer and neurodegenerative disorders, have been directly linked to mitochondrial dysfunction. The ability to efficiently target therapeutics to intracellular organelles such as mitochondria may represent new opportunities for the effective treatment of such ailments. The present study reports the synthesis, cellular uptake, cytotoxicity, and mitochondrial colocalization of conjugates of triphenylphosphonium cation (TPP) to amine-terminated, generation 4, poly(amidoamine) (PAMAM) dendrimer (G4NH2) nanocarriers. The mitochondrial-targeting moiety TPP was either directly conjugated to G4NH2 (G4NH2-TPP) or to the dendrimer through a flexible polyethylene glycol (PEG) linker (G4NH2-PEGTPP). Conjugation was done at various TPP densities to assess their biological activity and potential for mitochondrial-targeted drug delivery. Tests in an in vitro model of the human alveolar carcinoma (A549 cells) showed that even at a low TPP density (∼5 TPP) both the cellular internalization and mitochondrial targeting increase significantly, as determined by fluorescence activated cell sorting (FACS) and confocal microscopy (CM), respectively. At a density of ∼10 TPP per G4NH2, further increase in cellular internalization and mitochondrial targeting was achieved. However, at this higher density, the nanocarriers also showed pronounced cytotoxicity. It was observed that the toxicity of the conjugates is decreased upon the addition of a PEG linker between the dendrimer and TPP (G4NH2-PEGTPP), while the mitochondrial targeting ability of the nanocarriers is not affected as the PEG density increases. The proposed strategies indicate that TPP-conjugated G4NH2 dendrimers represent a potentially viable strategy for the targeting of therapeutic molecules to mitochondria, which may help improve therapeutic outcomes of diseases related to mitochondrial dysfunction.
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Affiliation(s)
- Elizabeth R Bielski
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, United States
| | - Qian Zhong
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, United States
| | - Matthew Brown
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, United States
| | - Sandro R P da Rocha
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, United States
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64
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Avaritt BR, Swaan PW. Internalization and Subcellular Trafficking of Poly-l-lysine Dendrimers Are Impacted by the Site of Fluorophore Conjugation. Mol Pharm 2015; 12:1961-9. [DOI: 10.1021/mp500765e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Brittany R. Avaritt
- Department
of Pharmaceutical
Sciences, Center for Nanobiotechnology, University of Maryland, Baltimore, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Peter W. Swaan
- Department
of Pharmaceutical
Sciences, Center for Nanobiotechnology, University of Maryland, Baltimore, 20 Penn Street, Baltimore, Maryland 21201, United States
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65
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Lock LL, Tang Z, Keith D, Reyes C, Cui H. Enzyme-Specific Doxorubicin Drug Beacon as Drug-Resistant Theranostic Molecular Probes. ACS Macro Lett 2015; 4:552-555. [PMID: 35596281 DOI: 10.1021/acsmacrolett.5b00170] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report here on the use of anticancer drug doxorubicin (Dox) to construct a Förster resonance energy transfer (FRET)-based theranostic molecular probe by covalently linking together through a lysine junction a fluorescent drug, a black hole quencher, and a cell-penetrating peptide. We show that upon cleavage by the target lysosomal protease cathepsin B (CatB) the designed drug beacon could release the fluorescent drug serving as an indicator for CatB. Our cell studies suggest that the drug-beacon design can help to circumvent the Dox drug resistance in NCI/ADR-Res ovarian cancer cells, showing significant improvement in cell cytotoxicity compared to the free drug. We believe our design opens up new opportunities to exploit the new functional and structural features of anticancer drugs in addition to their characteristic cytotoxicity.
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Affiliation(s)
- Lye Lin Lock
- Department
of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Zidu Tang
- Department
of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Daniel Keith
- Department
of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Claudia Reyes
- Department
of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Honggang Cui
- Department
of Chemical and Biomolecular Engineering, and Institute for NanoBioTechnology, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
- Department
of Oncology and Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
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66
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Cheng L, Hu Q, Cheng L, Hu W, Xu M, Zhu Y, Zhang L, Chen D. Construction and evaluation of PAMAM-DOX conjugates with superior tumor recognition and intracellular acid-triggered drug release properties. Colloids Surf B Biointerfaces 2015; 136:37-45. [PMID: 26360738 DOI: 10.1016/j.colsurfb.2015.04.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 03/17/2015] [Accepted: 04/01/2015] [Indexed: 11/29/2022]
Abstract
An ideal drug delivery system for cancer therapy should be equipped with extended circulation, improved tumor targeting and controlled drug release, as well as low toxicity from the carrier. In this study, a multifunctional drug delivery system based on the PEGylated poly(amidoamine) (PAMAM) dendrimer was designed, and folate-PEGylation was applied to modify the dendrimer in order to enhance tumor selectivity. A series of acid-labile PAMAM-DOX conjugates (FPP-hyd-DOX) with different FA ligand ratios were successfully constructed. (1)H NMR, FTIR, DLS and TEM were used to describe the physicochemical characterization of PAMAM-DOX conjugates. Both in vitro drug release assay and subcellular localization, the conjugates exhibited an obvious pH-triggered drug release. The FPP-hyd-DOX 16/1 displayed much lower IC50 value than that of non-targeted PP-hyd-DOX. Through fluorescence microscopy and flow cytometry investigations, the cellular uptake of FPP-hyd-DOX 16/1 was obviously enhanced, compared with that of PP-hyd-DOX. The cellular uptake mechanism and subcellular localization study revealed that the conjugates were internalized by KB cells via FA receptor and clathrin co-mediated endocytosis, delivered to acidic lysosomes and triggered the release of DOX into nuclei to exert its cytotoxicity. These obtained results showed that FPP-hyd-DOX conjugations would be a promising drug delivery carrier for targeted cancer therapy.
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Affiliation(s)
- Lifang Cheng
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Qing Hu
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Liang Cheng
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Wen Hu
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Ming Xu
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Yaqin Zhu
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Lu Zhang
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Dawei Chen
- Department of Pharmaceutics, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China; School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
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67
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Yang R, Xia S, Ye T, Yao J, Zhang R, Wang S, Wang S. Synthesis of a novel polyamidoamine dendrimer conjugating with alkali blue as a lymphatic tracer and study on the lymphatic targeting in vivo. Drug Deliv 2014; 23:2298-2308. [PMID: 25406493 DOI: 10.3109/10717544.2014.979515] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
In this study, a novel lymphatic tracer polyamidoamin-alkali blue (PAMAM-AB) was synthesized in order to evaluate the intra-lymphatic targeting ability and lymphatic tropism of PAMAM-AB after subcutaneous administration. UV-Vis, FT-IR, NMR and HPLC characterization were performed to prove the successful synthesis of PAMAM-AB. The calculated AB payload of PAMAM-AB conjugate was seven per dendrimer molecule (27.16% by weight). Hydrolysis stability of PAMAM-AB in vitro was evaluated, which was stable in PBS and human plasma. Lymphatic tracing were studied to determine the blue-stained intensity of PAMAM-AB in right popliteral lymph nodes (PLNs), iliac lymph nodes (ILNs) and para-aortic lymph nodes (PALNs) after subcutaneous administration. The pharmacokinetics and biodistribution of PAMAM-AB in mice were investigated. PLNs, ILNs and PALNs could be obviously blue-stained within 10 min after PAMAM-AB administration, and displayed a more rapid lymphatic absorption, a higher AUC value in lymph nodes and a longer lymph nodes residence time compared with methylene blue solution (MB-S), MB water-in-oil microemulsion (MB-ME), MB multiple microemulsion (MB-MME). Enhanced lymphatic drainage from the injection site and uptake into lymph of PAMAM-AB indicated that PAMAM-AB possesses the double function of lymphatic tracing and lymphatic targeting, and suggested the potential for the development of lymphatic targeting vectors or as a lymphatic tracer in its own right.
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Affiliation(s)
- Rui Yang
- a Department of Pharmaceutics , Shenyang Pharmaceutical University , Shenyang , PR China.,b Laboratory of Clinical Pharmacology , Academy of Traditional Chinese Medicine of Liaoning Province , Shenyang , PR China , and
| | - Suxia Xia
- b Laboratory of Clinical Pharmacology , Academy of Traditional Chinese Medicine of Liaoning Province , Shenyang , PR China , and
| | - Tiantian Ye
- a Department of Pharmaceutics , Shenyang Pharmaceutical University , Shenyang , PR China
| | - Jianhua Yao
- a Department of Pharmaceutics , Shenyang Pharmaceutical University , Shenyang , PR China
| | - Ruizhi Zhang
- c Department of Marketing , Henan University of Animal Husbandry and Economy , Zhengzhou , PR China
| | - Shujun Wang
- a Department of Pharmaceutics , Shenyang Pharmaceutical University , Shenyang , PR China
| | - Siling Wang
- a Department of Pharmaceutics , Shenyang Pharmaceutical University , Shenyang , PR China
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68
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Engelberth SA, Hempel N, Bergkvist M. Development of nanoscale approaches for ovarian cancer therapeutics and diagnostics. Crit Rev Oncog 2014; 19:281-315. [PMID: 25271436 DOI: 10.1615/critrevoncog.2014011455] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Ovarian cancer is the deadliest of all gynecological cancers and the fifth leading cause of death due to cancer in women. This is largely due to late-stage diagnosis, poor prognosis related to advanced-stage disease, and the high recurrence rate associated with development of chemoresistance. Survival statistics have not improved significantly over the last three decades, highlighting the fact that improved therapeutic strategies and early detection require substantial improvements. Here, we review and highlight nanotechnology-based approaches that seek to address this need. The success of Doxil, a PEGylated liposomal nanoencapsulation of doxorubicin, which was approved by the FDA for use on recurrent ovarian cancer, has paved the way for the current wave of nanoparticle formulations in drug discovery and clinical trials. We discuss and summarize new nanoformulations that are currently moving into clinical trials and highlight novel nanotherapeutic strategies that have shown promising results in preclinical in vivo studies. Further, the potential for nanomaterials in diagnostic imaging techniques and the ability to leverage nanotechnology for early detection of ovarian cancer are also discussed.
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Affiliation(s)
| | - Nadine Hempel
- SUNY College of Nanoscale Science and Engineering, Albany NY 12203
| | - Magnus Bergkvist
- SUNY College of Nanoscale Science and Engineering, Albany NY 12203
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69
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Geitner NK, Wang B, Andorfer RE, Ladner DA, Ke PC, Ding F. Structure-function relationship of PAMAM dendrimers as robust oil dispersants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:12868-12875. [PMID: 25279688 DOI: 10.1021/es5038194] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PAMAM dendrimers have recently been investigated as efficient and biocompatible oil dispersants utilizing their encapsulation capacity; however, their high cationic charge density has been shown to be cytotoxic. It is therefore imperative to mitigate cationic charge-induced toxicity and understand the effects of such changes. Presented here is a synergistic experimental and computational approach to examine the effects of varying terminal surface charge on the capacity of dendrimers to disperse model liner, polycyclic aromatic, and hybrid hydrocarbons. Uncharged dendrimers collapse by forming intramolecular hydrogen bonds, which reduce the hosting capability. On the other hand, changing the surface charges from positive to negative greatly shifts the pKa of tertiary amines of the PAMAM dendrimer interior. As a result, the negatively charged dendrimers have a significant percentage of tertiary amines protonated, ∼30%. This unexpected change in the interior protonation state causes electrostatic interactions with the anionic terminal groups, leading to contraction and a marked decrease in hydrocarbon hosting capacity. The present work highlights the robust nature of dendrimer oil dispersion and also illuminates potentially unintended or unanticipated effects of varying dendrimer surface chemistry on their encapsulation or hosting efficacy, which is important for their environmental, industrial, and biomedical applications.
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Affiliation(s)
- Nicholas K Geitner
- Department of Physics and Astronomy and ‡Department of Environmental Engineering and Earth Sciences, Clemson University , Clemson, South Carolina 29634, United States
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70
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Chen Z, Zhang P, Cheetham AG, Moon JH, Moxley JW, Lin YA, Cui H. Controlled release of free doxorubicin from peptide–drug conjugates by drug loading. J Control Release 2014; 191:123-30. [DOI: 10.1016/j.jconrel.2014.05.051] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/15/2014] [Accepted: 05/24/2014] [Indexed: 11/29/2022]
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71
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Sundara Rajan S, Turovskiy Y, Singh Y, Chikindas ML, Sinko PJ. Poly(ethylene glycol) (PEG)-lactic acid nanocarrier-based degradable hydrogels for restoring the vaginal microenvironment. J Control Release 2014; 194:301-9. [PMID: 25223229 DOI: 10.1016/j.jconrel.2014.08.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/13/2014] [Accepted: 08/30/2014] [Indexed: 01/10/2023]
Abstract
Women with bacterial vaginosis (BV) display reduced vaginal acidity, which make them susceptible to associated infections such as HIV. In the current study, poly(ethylene glycol) (PEG) nanocarrier-based degradable hydrogels were developed for the controlled release of lactic acid in the vagina of BV-infected women. PEG-lactic acid (PEG-LA) nanocarriers were prepared by covalently attaching lactic acid to 8-arm PEG-SH via cleavable thioester bonds. PEG-LA nanocarriers with 4 copies of lactic acid per molecule provided controlled release of lactic acid with a maximum release of 23% and 47% bound lactic acid in phosphate buffered saline (PBS, pH7.4) and acetate buffer (AB, pH4.3), respectively. The PEG nanocarrier-based hydrogels were formed by cross-linking the PEG-LA nanocarriers with 4-arm PEG-NHS via degradable thioester bonds. The nanocarrier-based hydrogels formed within 20 min under ambient conditions and exhibited an elastic modulus that was 100-fold higher than the viscous modulus. The nanocarrier-based degradable hydrogels provided controlled release of lactic acid for several hours; however, a maximum release of only 10%-14% bound lactic acid was observed possibly due to steric hindrance of the polymer chains in the cross-linked hydrogel. In contrast, hydrogels with passively entrapped lactic acid showed burst release with complete release within 30 min. Lactic acid showed antimicrobial activity against the primary BV pathogen Gardnerella vaginalis with a minimum inhibitory concentration (MIC) of 3.6 mg/ml. In addition, the hydrogels with passively entrapped lactic acid showed retained antimicrobial activity with complete inhibition G. vaginalis growth within 48 h. The results of the current study collectively demonstrate the potential of PEG nanocarrier-based hydrogels for vaginal administration of lactic acid for preventing and treating BV.
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Affiliation(s)
- Sujata Sundara Rajan
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Yevgeniy Turovskiy
- School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Yashveer Singh
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Michael L Chikindas
- School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Patrick J Sinko
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA.
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72
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Zhou Z, Ma X, Murphy CJ, Jin E, Sun Q, Shen Y, Van Kirk EA, Murdoch WJ. Molecularly Precise Dendrimer-Drug Conjugates with Tunable Drug Release for Cancer Therapy. Angew Chem Int Ed Engl 2014; 53:10949-55. [DOI: 10.1002/anie.201406442] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 07/29/2014] [Indexed: 11/10/2022]
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73
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Zhou Z, Ma X, Murphy CJ, Jin E, Sun Q, Shen Y, Van Kirk EA, Murdoch WJ. Molecularly Precise Dendrimer-Drug Conjugates with Tunable Drug Release for Cancer Therapy. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406442] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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74
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Oledzka E, Sobczak M, Nalecz-Jawecki G, Skrzypczak A, Kolodziejski W. Ampicillin-ester bonded branched polymers: characterization, cyto-, genotoxicity and controlled drug-release behaviour. Molecules 2014; 19:7543-56. [PMID: 24914899 PMCID: PMC6271874 DOI: 10.3390/molecules19067543] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/26/2014] [Accepted: 05/28/2014] [Indexed: 11/16/2022] Open
Abstract
The development and characterization of novel macromolecular conjugates of ampicillin using branched biodegradable polymers has been described in this study. The conjugates have been prepared coupling the β-lactam antibiotic with branched polymer matrices based on the natural oligopeptide core. The cyto- and genotoxicity of the synthesized polymers were evaluated with a bacterial luminescence test, two protozoan assays and Salmonella typhimurium TA1535. The presence of a newly formed covalent bond between the drug and the polymer matrices was confirmed by 1H-NMR and FTIR studies. A drug content (15.6 and 10.2 mole %) in the macromolecular conjugates has been determined. The obtained macromolecular products have been subjected to further in vitro release studies. The total percentage of ampicillin released after 21 days of incubation was nearly 60% and 14% and this resulted from the different physicochemical properties of the polymeric matrices. This is the first report on the application of branched biodegradable polymeric matrices for the covalent conjugation of ampicillin. The obtained results showed that the synthesized macromolecular drug-conjugates might slowly release the active drug molecule and improve the pharmacokinetics of ampicillin.
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Affiliation(s)
- Ewa Oledzka
- Department of Inorganic and Analytical Chemistry, Medical University of Warsaw, Faculty of Pharmacy, Banacha 1, Warsaw 02-097, Poland.
| | - Marcin Sobczak
- Department of Inorganic and Analytical Chemistry, Medical University of Warsaw, Faculty of Pharmacy, Banacha 1, Warsaw 02-097, Poland.
| | - Grzegorz Nalecz-Jawecki
- Department of Environmental Health Science, Medical University of Warsaw, Faculty of Pharmacy, Banacha 1,Warsaw 02-097, Poland.
| | - Agata Skrzypczak
- Department of Environmental Health Science, Medical University of Warsaw, Faculty of Pharmacy, Banacha 1,Warsaw 02-097, Poland.
| | - Waclaw Kolodziejski
- Department of Inorganic and Analytical Chemistry, Medical University of Warsaw, Faculty of Pharmacy, Banacha 1, Warsaw 02-097, Poland.
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75
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Satsangi A, Roy SS, Satsangi RK, Vadlamudi RK, Ong JL. Design of a paclitaxel prodrug conjugate for active targeting of an enzyme upregulated in breast cancer cells. Mol Pharm 2014; 11:1906-18. [PMID: 24847940 DOI: 10.1021/mp500128k] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Breast cancer is the second most common cause of cancer-related deaths in women. Chemotherapy is an important treatment modality, and paclitaxel (PTX) is often the first-line therapy for its metastatic form. The two most notable limitations related to PTX-based treatment are the poor hydrophilicity of the drug and the systemic toxicity due to the drug's nonspecific and indiscriminate distribution among the tissues. The present work describes an approach to counter both challenges by designing a conjugate of PTX with a hydrophilic macromolecule that is coupled through a biocleavable linker, thereby allowing for active targeting to an enzyme significantly upregulated in cancer cells. The resultant strategy would allow for the release of the active ingredient preferentially at the site of action in related cancer cells and spare normal tissue. Thus, PTX was conjugated to the hydrophilic poly(amdioamine) [PAMAM] dendrimer through the cathepsin B-cleavable tetrapeptide Gly-Phe-Leu-Gly. The PTX prodrug conjugate (PGD) was compared to unbound PTX through in vitro evaluations against breast cancer cells and normal kidney cells as well as through in vivo evaluations using xenograft mice models. As compared to PTX, PGD demonstrated a higher cytotoxicity specific to cell lines with moderate-to-high cathepsin B activity; cells with comparatively lower cathepsin B activity demonstrated an inverse of this relationship. Regression analysis between the magnitude of PGD-induced cytotoxic increase over PTX and cathepsin B expression showed a strong, statistically significant correlation (r(2) = 0.652, p < 0.05). The PGD conjugate also demonstrated a markedly higher tumor reduction as compared to PTX treatment alone in MDA-MB-231 tumor xenograft models, with PGD-treated tumor volumes being 48% and 34% smaller than PTX-treated volumes at weeks 2 and 3 after treatment initiation.
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Affiliation(s)
- Arpan Satsangi
- Joint Graduate Program in Biomedical Engineering, University of Texas at San Antonio and the University of Texas Health Science Center at San Antonio , San Antonio, Texas 78249, United States
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76
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Cheetham AG, Ou YC, Zhang P, Cui H. Linker-determined drug release mechanism of free camptothecin from self-assembling drug amphiphiles. Chem Commun (Camb) 2014; 50:6039-42. [PMID: 24769796 DOI: 10.1039/c3cc49453e] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here that the release mechanism of free camptothecin from self-assembling drug amphiphiles can be regulated by use of different linker groups. Our results highlight the significance of the linker group of drug amphiphiles on the drug release efficiency and their consequent in vitro efficacy.
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Affiliation(s)
- Andrew G Cheetham
- Department of Chemical and Biomolecular Engineering and Institute for NanoBioTechnology (INBT), The Johns Hopkins University, Baltimore, MD 21218, USA.
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77
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Advanced progress of microencapsulation technologies: In vivo and in vitro models for studying oral and transdermal drug deliveries. J Control Release 2014; 178:25-45. [DOI: 10.1016/j.jconrel.2013.12.028] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 12/10/2013] [Accepted: 12/17/2013] [Indexed: 11/20/2022]
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78
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Zou J, Zhang F, Zhang S, Pollack SF, Elsabahy M, Fan J, Wooley KL. Poly(ethylene oxide)-block-polyphosphoester-graft-paclitaxel conjugates with acid-labile linkages as a pH-sensitive and functional nanoscopic platform for paclitaxel delivery. Adv Healthc Mater 2014; 3:441-8. [PMID: 23997013 PMCID: PMC3938983 DOI: 10.1002/adhm.201300235] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 07/31/2013] [Indexed: 11/10/2022]
Abstract
There has been an increasing interest to develop new types of stimuli-responsive drug delivery vehicles with high drug loading and controlled release properties for chemotherapeutics. An acid-labile poly(ethylene oxide)-block-polyphosphoester-graft-PTX drug conjugate (PEO-b-PPE-g-PTX G2) degradable, polymeric paclitaxel (PTX) conjugate containing ultra-high levels of PTX loading is improved significantly, in this second-generation development, which involves connection of each PTX molecule to the polymer backbone via a pH-sensitive β-thiopropionate linkage. The PEO-b-PPE-g-PTX G2 forms well-defined nanoparticles in an aqueous solution, by direct dissolution into water, with a number-averaged hydrodynamic diameter of 114 ± 31 nm, and exhibits a PTX loading capacity as high as 53 wt%, with a maximum PTX concentration of 0.68 mg mL(-1) in water (vs 1.7 μg mL(-1) for free PTX). The PEO-b-PPE-g-PTX G2 shows accelerated drug release under acidic conditions (≈50 wt% PTX released in 8 d) compared with neutral conditions (≈20 wt% PTX released in 8 d). Compared to previously reported polyphosphoester-based PTX drug conjugates, PEO-b-PPE-g-PTX G1 without the β-thiopropionate linker, the PEO-b-PPE-g-PTX G2 shows pH-triggered drug release property and 5- to 8-fold enhanced in vitro cytotoxicity against two cancer cell lines.
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Affiliation(s)
- Jiong Zou
- Departments of Chemistry and Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, TX 77842, USA
| | - Fuwu Zhang
- Departments of Chemistry and Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, TX 77842, USA
| | - Shiyi Zhang
- Departments of Chemistry and Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, TX 77842, USA
| | - Stephanie F. Pollack
- Departments of Chemistry and Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, TX 77842, USA
| | - Mahmoud Elsabahy
- Departments of Chemistry and Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, TX 77842, USA
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Jingwei Fan
- Departments of Chemistry and Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, TX 77842, USA
| | - Karen L. Wooley
- Departments of Chemistry and Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, TX 77842, USA
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79
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Yu Y, Chen CK, Law WC, Weinheimer E, Sengupta S, Prasad PN, Cheng C. Polylactide-graft-doxorubicin nanoparticles with precisely controlled drug loading for pH-triggered drug delivery. Biomacromolecules 2014; 15:524-32. [PMID: 24446700 DOI: 10.1021/bm401471p] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Nanoparticles (NPs) with high drug loading and pH-responsivity were prepared by nanoprecipitation of a hydrophobic polymer-drug conjugate (PDC). The PDC, polylactide-graft-doxorubicin (PLA-g-DOX), was synthesized by azide-alkyne click reaction to transform acetylene-functionalized PLA into PLA-graft-aldehyde (PLA-g-ALD), followed by DOX conjugation to form acid-sensitive Schiff base linkage between drug moieties and polymer scaffold. The DOX loading amount in PLA-g-DOX PDC was determined to be 32 wt % by (1)H NMR and UV-vis spectroscopies. PLA-g-DOX PDC was further used to prepare NPs with precisely controlled drug loading by nanoprecipitation in the presence of a PEGylated surfactant. The effects of organic solvent, PLA-g-DOX PDC concentration and PLA-g-DOX/surfactant mass ratio on size and size distribution of NPs were systematically examined based on analysis by dynamic light scattering (DLS) and transmission electron microscopy (TEM). NPs prepared under the optimal conditions exhibited well-defined spherical morphology with volume-average hydrodynamic diameter (Dh) around 100 nm. Due to the Schiff base conjugation linkage in PLA-g-DOX PDC, acid-sensitive drug release behavior of the NPs was observed. In vitro studies against MCF-7 breast cancer cells showed that the NPs can be readily taken up and result in enhanced therapeutic efficiency as compared to DOX·HCl, indicating their promising potential applications as anticancer nanomedicines.
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Affiliation(s)
- Yun Yu
- Department of Chemical and Biological Engineering, §Institute for Lasers, Photonics and Biophotonics, and ∥Department of Chemistry, University at Buffalo, The State University of New York , Buffalo, New York 14260, United States
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80
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Triclosan-loaded poly(amido amine) dendrimer for simultaneous treatment and remineralization of human dentine. Colloids Surf B Biointerfaces 2013; 115:237-43. [PMID: 24362062 DOI: 10.1016/j.colsurfb.2013.11.045] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 11/04/2013] [Accepted: 11/25/2013] [Indexed: 02/05/2023]
Abstract
In order to treat dental caries of damaged dentine, triclosan-loaded carboxyl-terminated poly(amido amine) dendrimer (PAMAM-COOH) is prepared and characterized. While being incubated in artificial saliva, triclosan-loaded PAMAM-COOH formulation can induce in situ remineralization of hydroxyapatite (HA) on etched dentine, and the regenerated HA has a similar crystal structure with natural dentine. It can also release the encapsulated triclosan for a long period. The interesting drug release profiles are controlled by both dendrimer encapsulation capability and the mineralization degree, which are ideal to obtain multifunctional properties of long-term release of anti-bacterial drug for local treatment during the remineralization process. The triclosan-loaded G4-COOH provides a general strategy to cure dental caries and repair damaged dentine at the same time, which forms a potential restorative material for dental repair.
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81
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Park H, Na K. Conjugation of the photosensitizer Chlorin e6 to pluronic F127 for enhanced cellular internalization for photodynamic therapy. Biomaterials 2013; 34:6992-7000. [DOI: 10.1016/j.biomaterials.2013.05.070] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 05/25/2013] [Indexed: 02/08/2023]
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82
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Sk UH, Kambhampati SP, Mishra MK, Lesniak WG, Zhang F, Kannan RM. Enhancing the Efficacy of Ara-C through Conjugation with PAMAM Dendrimer and Linear PEG: A Comparative Study. Biomacromolecules 2013; 14:801-10. [DOI: 10.1021/bm3018615] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ugir Hossain Sk
- Departments of Chemical
Engineering and Materials Science and Biomedical
Engineering, Wayne State University, Detroit, Michigan 48202, United States
| | - Siva P. Kambhampati
- Departments of Chemical
Engineering and Materials Science and Biomedical
Engineering, Wayne State University, Detroit, Michigan 48202, United States
- Center for Nanomedicine/Wilmer
Eye Institute, Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore,
Maryland 21287, United States
| | - Manoj K. Mishra
- Departments of Chemical
Engineering and Materials Science and Biomedical
Engineering, Wayne State University, Detroit, Michigan 48202, United States
- Center for Nanomedicine/Wilmer
Eye Institute, Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore,
Maryland 21287, United States
| | - Wojciech G. Lesniak
- Departments of Chemical
Engineering and Materials Science and Biomedical
Engineering, Wayne State University, Detroit, Michigan 48202, United States
- Center for Nanomedicine/Wilmer
Eye Institute, Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore,
Maryland 21287, United States
| | - Fan Zhang
- Departments of Chemical
Engineering and Materials Science and Biomedical
Engineering, Wayne State University, Detroit, Michigan 48202, United States
- Center for Nanomedicine/Wilmer
Eye Institute, Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore,
Maryland 21287, United States
| | - Rangaramanujam M. Kannan
- Departments of Chemical
Engineering and Materials Science and Biomedical
Engineering, Wayne State University, Detroit, Michigan 48202, United States
- Center for Nanomedicine/Wilmer
Eye Institute, Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore,
Maryland 21287, United States
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83
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Lo ST, Kumar A, Hsieh JT, Sun X. Dendrimer nanoscaffolds for potential theranostics of prostate cancer with a focus on radiochemistry. Mol Pharm 2013; 10:793-812. [PMID: 23294202 DOI: 10.1021/mp3005325] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Dendrimers are a class of structurally defined macromolecules featured with a central core, a low-density interior formed by repetitive branching units, and a high-density exterior terminated with surface functional groups. In contrast to their polymeric counterparts, dendrimers are nanosized and symmetrically shaped, which can be reproducibly synthesized on a large scale with monodispersity. These unique features have made dendrimers of increasing interest for drug delivery and other biomedical applications as nanoscaffold systems. Intended to address the potential use of dendrimers for the development of theranostic agents, which combines therapeutics and diagnostics in a single entity for personalized medicine, this review focuses on the reported methodologies of using dendrimer nanoscaffolds for targeted imaging and therapy of prostate cancer. Of particular interest, relevant chemistry strategies are discussed due to their important roles in the design and synthesis of diagnostic and therapeutic dendrimer-based nanoconjugates and potential theranostic agents, targeted or nontargeted. Given the developing status of nanoscaffolded theranostics, major challenges and potential hurdles are discussed along with the examples representing current advances.
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Affiliation(s)
- Su-Tang Lo
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
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84
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Zhu J, Shi X. Dendrimer-based nanodevices for targeted drug delivery applications. J Mater Chem B 2013; 1:4199-4211. [DOI: 10.1039/c3tb20724b] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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85
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Carberry TP, Tarallo R, Falanga A, Finamore E, Galdiero M, Weck M, Galdiero S. Dendrimer functionalization with a membrane-interacting domain of herpes simplex virus type 1: towards intracellular delivery. Chemistry 2012; 18:13678-85. [PMID: 22968943 DOI: 10.1002/chem.201202358] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Indexed: 01/12/2023]
Abstract
A poly(amide)-based dendrimer was synthesized and functionalized with the membrane-interacting peptide gH(625-644) (gH625) derived from the herpes simplex virus type 1 (HSV-1) envelope glycoprotein H, which has previously been shown to assist in delivering large cargoes across the cellular membrane. We demonstrate that the attachment of the gH625 peptide sequence to the termini of a dendrimer allows the conjugate to penetrate into the cellular matrix, whereas the unfunctionalized dendrimer is excluded from translocation. The peptide-functionalized dendrimer is rapidly taken into the cells mainly through a non-active translocation mechanism. Our results suggest that the presented peptidodendrimeric scaffold may be a promising material for efficient drug delivery.
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Affiliation(s)
- Tom P Carberry
- Molecular Design Institute, Department of Chemistry, New York University, NY 10003, USA
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86
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Filipowicz A, Wołowiec S. Bioconjugates of PAMAM dendrimers with trans-retinal, pyridoxal, and pyridoxal phosphate. Int J Nanomedicine 2012; 7:4819-28. [PMID: 22973101 PMCID: PMC3439857 DOI: 10.2147/ijn.s34175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Background Bioconjugates of a polyamidoamine (PAMAM) G3 dendrimer and an aldehyde were synthesized as carriers for vitamins A and B6, and the bioavailability of these vitamins for skin nutrition was investigated. Methods Nuclear magnetic resonance (NMR) and ultraviolet-visible methods were used to characterize the structure of the bioconjugates and for monitoring release of pyridoxal (Pyr) and pyridoxal phosphate (PLP) from these bioconjugates in vitro. A skin model permeation of bioconjugates was also studied in a Franz chamber. Results A transdermal G3 PAMAM dendrimer was used to synthesize bioconjugates with trans-retinal (Ret), pyridoxal (Pyr), or PLP. These nanomolecules, containing up to four covalently linked Ret, Pyr, or PLP (G34Ret, G34Pyr, and G34PLP), were able to permeate the skin, as demonstrated in vitro using a model skin membrane. PLP and Pyr bound to a macromolecular vehicle were active cofactors for glutamic pyruvic transaminase, as shown by 1H NMR spectral monitoring of the progress of the L-alanine + α-ketoglutarate → glutamic acid + pyruvic acid reaction. Conclusion PAMAM-PLP, PAMAM-Pyr, and PAMAM-Ret bioconjugates are able to permeate the skin. PLP and Pyr are available as cofactors for glutamic pyruvic transaminase.
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Affiliation(s)
- A Filipowicz
- Department of Cosmetology, University of Information Technology and Management in Rzeszów, Rzeszów, Poland
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87
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Vandana M, Sahoo SK. Reduced Folate Carrier Independent Internalization of PEGylated Pemetrexed: A Potential Nanomedicinal Approach for Breast Cancer Therapy. Mol Pharm 2012; 9:2828-43. [DOI: 10.1021/mp300131t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mallaredy Vandana
- Laboratory of Nanomedicine, Institute of Life Sciences, Chandrasekarpur, Bhubaneswar 751023,
India
| | - Sanjeeb K. Sahoo
- Laboratory of Nanomedicine, Institute of Life Sciences, Chandrasekarpur, Bhubaneswar 751023,
India
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88
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Pednekar PP, Jadhav KR, Kadam VJ. Aptamer-dendrimer bioconjugate: a nanotool for therapeutics, diagnosis, and imaging. Expert Opin Drug Deliv 2012; 9:1273-88. [PMID: 22897588 DOI: 10.1517/17425247.2012.716421] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
INTRODUCTION Aptamers hold great promise as molecular tool in biomedical applications due to the therapeutic utility exhibited by their target specificity and sensitivity. Although current development of aptamer is hindered by its probable in vivo degradation, inefficient immobilization on probe surface, and generation of low detection signal, bioconjugation with nanomaterials can feasibly solve these problems. Nanostructures such as dendrimers, with multivalency and nonimmunogenicity, bioconjugated with aptamers have opened newer vistas for better pharmaceutical applications of aptamers. AREAS COVERED This review covers brief overview of aptamers and dendrimers, with specific focus on recent progresses of aptamer-dendrimer (Apt-D) bioconjugate in areas of targeted drug delivery, diagnosis, and molecular imaging along with the discussion on the currently available conjugates, using their in vitro and in vivo results. EXPERT OPINION The novel Apt-D bioconjugates have led to advances in targeting cancer cell, have amplified biosensing, and offered in vivo cell imaging. Because of the unique properties and applications, Apt-D bioconjugate propose an exciting future. However, further research in synthesis of new target-specific aptamers and their conjugation with dendrimers is required to establish full potential of Apt-D bioconjugate.
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Affiliation(s)
- Priti P Pednekar
- University of Mumbai, Bharati Vidyapeeth's College of Pharmacy, Department of Pharmaceutics, CBD Belapur, Sector-8, Navi-Mumbai-400614, India.
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89
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Samal SK, Dash M, Van Vlierberghe S, Kaplan DL, Chiellini E, van Blitterswijk C, Moroni L, Dubruel P. Cationic polymers and their therapeutic potential. Chem Soc Rev 2012; 41:7147-94. [PMID: 22885409 DOI: 10.1039/c2cs35094g] [Citation(s) in RCA: 465] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The last decade has witnessed enormous research focused on cationic polymers. Cationic polymers are the subject of intense research as non-viral gene delivery systems, due to their flexible properties, facile synthesis, robustness and proven gene delivery efficiency. Here, we review the most recent scientific advances in cationic polymers and their derivatives not only for gene delivery purposes but also for various alternative therapeutic applications. An overview of the synthesis and preparation of cationic polymers is provided along with their inherent bioactive and intrinsic therapeutic potential. In addition, cationic polymer based biomedical materials are covered. Major progress in the fields of drug and gene delivery as well as tissue engineering applications is summarized in the present review.
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Affiliation(s)
- Sangram Keshari Samal
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281, S4-Bis, B-9000 Ghent, Belgium.
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90
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Hamidi A, Rashidi MR, Asgari D, Aghanejad A, Davaran S. Covalent Immobilization of Trypsin on a Novel Aldehyde-Terminated PAMAM Dendrimer. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.7.2181] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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91
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Oledzka E, Kaliszewska D, Sobczak M, Raczak A, Nickel P, Kolodziejski W. Synthesis and properties of a star-shaped poly(ϵ-caprolactone)-ibuprofen conjugate. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:2039-54. [PMID: 22040511 DOI: 10.1163/092050611x605230] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A series of novel star-shaped poly(ϵ-caprolactone) (PCL) biodegradable polyesters were synthesized through ring-opening polymerization of ϵ-caprolactone in the presence of a poly(amidoamine) (PAMAM) dendrimer initiator. The polymers (PAMAM/PCLs) were obtained with a high yield (92%) and a number-average molecular weight of up to 14 000 g/mol. The nonlinear structure of PAMAM/PCLs was confirmed by nuclear magnetic resonance, gel-permeation chromatography, thermogravimetric analysis and differential scanning calorimetry. Thermal analysis indicated that the star-shaped PAMAM/PCLs had a melting point, degree of crystallinity, glass transition temperature and maximum decomposition temperature all lower than those of linear PCL. Ibuprofen (IBU), a popular non-steroidal anti-inflammatory drug, was co-valently (ester) bonded to the PAMAM/PCL molecules using the DCC/DMAP coupling method (DCC, N,N'-dicyclohexylcarbodiimide; DMAP, 4-(dimethylamino)pyridine). A high drug content (33.1 mol%) in the conjugate was obtained. The in-vitro drug-release profiles of IBU from the PAMAM/PCL/IBU conjugate were examined and found adequate for drug-carrier applications of our star-shaped polymers.
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Affiliation(s)
- Ewa Oledzka
- a Department of Inorganic and Analytical Chemistry , Faculty of Pharmacy, Medical University of Warsaw , Banacha 1 , Warsaw , 02-097 , Poland
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92
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DANG G, SHI Y, FU Z, YANG W. Fe3O4@PS@PAMAM-Ag Magnetic Nanocatalysts and Their Recoverable Catalytic Ability. CHINESE JOURNAL OF CATALYSIS 2012. [DOI: 10.1016/s1872-2067(11)60369-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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93
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El Kazzouli S, Mignani S, Bousmina M, Majoral JP. Dendrimer therapeutics: covalent and ionic attachments. NEW J CHEM 2012. [DOI: 10.1039/c1nj20459a] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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94
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PAMAM dendrimer-azithromycin conjugate nanodevices for the treatment of Chlamydia trachomatis infections. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2011; 7:935-44. [DOI: 10.1016/j.nano.2011.04.008] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 03/25/2011] [Accepted: 04/18/2011] [Indexed: 01/18/2023]
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95
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Bielawski K, Bielawska A, Muszyńska A, Popławska B, Czarnomysy R. Cytotoxic activity of G3 PAMAM-NH₂ dendrimer-chlorambucil conjugate in human breast cancer cells. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2011; 32:364-372. [PMID: 22004955 DOI: 10.1016/j.etap.2011.08.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 07/08/2011] [Accepted: 08/02/2011] [Indexed: 05/31/2023]
Abstract
Evaluation of the cytotoxicity of a novel G3 PAMAM-NH(2) dendrimer-chlorambucil conjugate employing a MTT assay and inhibition of [(3)H]thymidine incorporation into DNA in both MDA-MB-231 and MCF-7 breast cancer cells demonstrated that the conjugate was more potent antiproliferative agent than chlorambucil. It was found that dendrimer-chlorambucil conjugate was more active inhibitor of collagen biosynthesis than chlorambucil. Our experiments carried out with flow cytometry assessment of annexin V binding and fluorescent microscopy assay revealed that PAMAM-CH conjugate inhibited the proliferation of MCF-7 and MDA-231 malignant cells by increasing the number of apoptotic and necrotic cells. The apoptotic effect of PAMAM-CH conjugate was found to be stronger than that caused by chlorambucil.
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Affiliation(s)
- Krzysztof Bielawski
- Department of Medicinal Chemistry, Medical University of Białystok, Kilińskiego 1, 15-089 Białystok, Poland.
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96
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Poly(amidoamine) dendrimer-erythromycin conjugates for drug delivery to macrophages involved in periprosthetic inflammation. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2011; 7:284-94. [DOI: 10.1016/j.nano.2010.10.008] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 10/12/2010] [Accepted: 10/27/2010] [Indexed: 11/21/2022]
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97
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Amir RJ, Albertazzi L, Willis J, Khan A, Kang T, Hawker CJ. Multifunctional trackable dendritic scaffolds and delivery agents. Angew Chem Int Ed Engl 2011; 50:3425-9. [PMID: 21391296 PMCID: PMC3491073 DOI: 10.1002/anie.201007427] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Revised: 01/19/2011] [Indexed: 01/05/2023]
Affiliation(s)
- Roey J. Amir
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, CA 93106-5121, USA, Fax: (+1-805) 893-8797
| | - Lorenzo Albertazzi
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, CA 93106-5121, USA, Fax: (+1-805) 893-8797. NEST, Scuola Normale Superiore and CNR-INFM, and IIT@NEST, Center for Nanotechnology Innovation, Piazza San Silvestro 12, 56126 Pisa, Italy
| | - Jenny Willis
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, CA 93106-5121, USA, Fax: (+1-805) 893-8797
| | - Anzar Khan
- Department of Materials, Institute of Polymers, ETH-Zurich, Wolfgang-Pauli-Strasse 10, HCl H-520, 8093 Zurich Switzerland
| | - Taegon Kang
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, CA 93106-5121, USA, Fax: (+1-805) 893-8797
| | - Craig J. Hawker
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, CA 93106-5121, USA, Fax: (+1-805) 893-8797
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98
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Amir RJ, Albertazzi L, Willis J, Khan A, Kang T, Hawker CJ. Multifunctional Trackable Dendritic Scaffolds and Delivery Agents. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007427] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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99
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Cheng Y, Zhao L, Li Y, Xu T. Design of biocompatible dendrimers for cancer diagnosis and therapy: current status and future perspectives. Chem Soc Rev 2011; 40:2673-703. [PMID: 21286593 DOI: 10.1039/c0cs00097c] [Citation(s) in RCA: 358] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In the past decade, nanomedicine with its promise of improved therapy and diagnostics has revolutionized conventional health care and medical technology. Dendrimers and dendrimer-based therapeutics are outstanding candidates in this exciting field as more and more biological systems have benefited from these starburst molecules. Anticancer agents can be either encapsulated in or conjugated to dendrimer and be delivered to the tumour via enhanced permeability and retention (EPR) effect of the nanoparticle and/or with the help of a targeting moiety such as antibody, peptides, vitamins, and hormones. Imaging agents including MRI contrast agents, radionuclide probes, computed tomography contrast agents, and fluorescent dyes are combined with the multifunctional nanomedicine for targeted therapy with simultaneous cancer diagnosis. However, an important question reported with dendrimer-based therapeutics as well as other nanomedicines to date is the long-term viability and biocompatibility of the nanotherapeutics. This critical review focuses on the design of biocompatible dendrimers for cancer diagnosis and therapy. The biocompatibility aspects of dendrimers such as nanotoxicity, long-term circulation, and degradation are discussed. The construction of novel dendrimers with biocompatible components, and the surface modification of commercially available dendrimers by PEGylation, acetylation, glycosylation, and amino acid functionalization have been proposed as available strategies to solve the safety problem of dendrimer-based nanotherapeutics. Also, exciting opportunities and challenges on the development of dendrimer-based nanoplatforms for targeted cancer diagnosis and therapy are reviewed (404 references).
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Affiliation(s)
- Yiyun Cheng
- School of Life Sciences, East China Normal University, Shanghai, 200062, People's Republic of China.
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100
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Soliman GM, Sharma A, Maysinger D, Kakkar A. Dendrimers and miktoarm polymers based multivalent nanocarriers for efficient and targeted drug delivery. Chem Commun (Camb) 2011; 47:9572-87. [DOI: 10.1039/c1cc11981h] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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