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Bi X, Watts DB, Dorman I, Kirk CM, Thomas M, Singleton I, Malcom C, Barnes T, Carter C, Liang A. Polyamidoamine dendrimer-mediated hydrogel for solubility enhancement and anti-cancer drug delivery. J Biomater Appl 2024; 38:733-742. [PMID: 37933579 DOI: 10.1177/08853282231213712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
The application of hydrogels for anti-cancer drug delivery has garnered considerable interest in the medical field. Current cancer treatment approaches, such as chemotherapy and radiation therapy, often induce severe side effects, causing significant distress and substantial health complications to patients. Hydrogels present an appealing solution as they can be precisely injected into specific sites within the body, facilitating the sustainable release of encapsulated drugs. This localized treatment approach holds great potential for reducing toxicity levels and improving drug delivery efficacy. In this study we developed a hydrogel delivery system containing polyamidoamine (PAMAM) dendrimer and polyethylene glycol (PEG) for solubility enhancement and sustained delivery of hydrophobic anti-cancer drugs. The three selected model drugs, e.g. silibinin, camptothecin, and methotrexate, possess limited aqueous solubility and thus face restricted application. In the presence of vinyl sulfone functionalized PAMAM dendrimer at 45 mg/mL concentration, drug solubility is increased by 37-fold, 4-fold, and 10-fold for silibinin, camptothecin, and methotrexate, respectively. By further crosslinking of the functionalized PAMAM dendrimer and thiolated PEG, we successfully developed a fast-crosslinking hydrogel capable of encapsulating a significant payload of solubilized cancer drugs for sustained release. In water, the drug encapsulated hydrogels release 30%-80% of their loads in 1-4 days. MTT assays of J82 and MCF7 cells with various doses of drug encapsulated hydrogels reveal that cytotoxicity is observed for all three drugs on both J82 and MCF7 cell lines after 48 h. Notably, camptothecin exhibits higher cytotoxicity to both cell lines than silibinin and methotrexate, achieving up to 95% cell death at experimental conditions, despite its lower solubility. Our experiments provide evidence that the PAMAM dendrimer-mediated hydrogel system significantly improves the solubility of hydrophobic drugs and facilitates their sustained release. These findings position the system as a promising platform for controlled delivery of hydrophobic drugs for intratumoral cancer treatment.
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Affiliation(s)
- Xiangdong Bi
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Darra B Watts
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Ian Dorman
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Casianna M Kirk
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Marisa Thomas
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Isaiah Singleton
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Colleen Malcom
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Taylor Barnes
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Colby Carter
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
| | - Aiye Liang
- Department of Chemistry, Charleston Southern University, Charleston, SC, USA
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Novel compound shows in vivo anthelmintic activity in gerbils and sheep infected by Haemonchus contortus. Sci Rep 2022; 12:13004. [PMID: 35906366 PMCID: PMC9338094 DOI: 10.1038/s41598-022-17112-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 07/20/2022] [Indexed: 11/08/2022] Open
Abstract
The control of gastrointestinal nematodes in livestock is becoming increasingly difficult due to the limited number of available drugs and the rapid development of anthelmintic resistance. Therefore, it is imperative to develop new anthelmintics that are effective against nematodes. Under this context, we tested the potential toxicity of three compounds in mice and their potential anthelmintic efficacy in Mongolian gerbils infected with Haemonchus contortus. The compounds were selected from previous in vitro experiments: two diamine (AAD-1 and AAD-2) and one benzimidazole (2aBZ) derivatives. 2aBZ was also selected to test its efficacy in sheep. In Mongolian gerbils, the benzimidazole reduced the percentage of pre-adults present in the stomach of gerbils by 95% at a dose of 200 mg/kg. In sheep, there was a 99% reduction in the number of eggs shed in faeces after 7 days at a dose of 120 mg/kg and a 95% reduction in the number of worm adults present in the abomasum. In conclusion, 2aBZ could be considered a promising candidate for the treatment of helminth infections in small ruminants.
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Cruz-Hernández C, García-Espinosa DA, Guadarrama P. Click synthesis of novel dendronized curcumin and analogs. Strengthening of physicochemical properties toward biological applications. Org Biomol Chem 2022; 20:2643-2650. [PMID: 35285845 DOI: 10.1039/d2ob00284a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Curcumin and its analogs, chalcones, and C5-monocarbonyl are molecules of great therapeutic potential, but their poor stability and hydrophobicity have hampered their extensive use in clinical trials. Therefore, significant efforts have been made in materials science to improve their physicochemical properties. In this study, we propose dendronization as a synthetic strategy to strengthen some physicochemical properties such as solubility and stability of curcumin and analogs, taking advantage of the click chemistry (CuAAC) to attach second-generation polyester dendrons to the unsaturated cores. The dendronization, with the subsequent formation of aromatic triazole groups as linkers, not only modified the solubility and stability of the molecular systems but also favored the diketo tautomeric form of curcumin, as demonstrated spectroscopically. This result is significant since the diketo tautomer, which preserves the antioxidant properties of curcumin, is the most biologically active form. The hydrophobic/hydrophilic balance, achieved after dendronization, allowed the solubilization of the chromophoric molecules in buffered solutions at relevant pH values (7.4 and 6.4). Furthermore, the stability of all molecules was also upgraded since UV-vis absorption spectra did not exhibit modified profiles after 7 days at physiologic pH. From photochemical stability experiments irradiating at 415 nm, the dendritic derivatives containing triazole linkers were more susceptible to being degraded. All derivatives exhibited emission properties according to the length of each conjugate fragment. Fluorescence experiments evidenced the role of dendrons in preventing emission quenching by aggregation and exhibited differentiated emission behavior depending on the linker type (triazole or ester) between the chromophoric core and the polyester dendrons.
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Affiliation(s)
- Carlos Cruz-Hernández
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
| | | | - Patricia Guadarrama
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
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Sanabria R. Nanotechnological Improvement of Veterinary Anthelmintics. Pharm Nanotechnol 2021; 9:5-14. [PMID: 32448112 DOI: 10.2174/2211738508666200524233724] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/31/2020] [Accepted: 04/27/2020] [Indexed: 11/22/2022]
Abstract
Helminths infections are among the most important problems in animal health and husbandry. Moreover, zoonotic helminths endanger rural communities, particularly in developing countries. Helminthiasis are not only important in relation to the harmful effects of parasites; additional issues like anthelmintic resistance spread became more important over time. As new anthelmintic development takes many years and millions of dollars of investment, some strategies are currently focused on the modification of already available drugs, in order to improve their efficacy and overcome their limitations. In this field, nanotechnology has brought a novel approach, showing advantages like the regulation of the drug's delivery and kinetics, reaching of specific targets, and possibilities to avoid the systemic spread and side effects. Taking this into account, the present review aims to introduce some of the current knowledge in anthelmintic improvement based on nanotechnology, and how researchers could benefit from this technology in order to overcome the drugs limitations. Finally, some insights into potential field applications are discussed, based on the most important concerns of current anthelmintic therapy.
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Affiliation(s)
- Rodrigo Sanabria
- Instituto Tecnologico Chascomus (INTECH)-CONICET-UNSAM. Av. Marino KM 8.2, (7130), Chascomús, Argentina
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Wang Z, Zhang H, Li S, Lei D, Tang BZ, Ye R. Recent Advances in Clusteroluminescence. Top Curr Chem (Cham) 2021; 379:14. [PMID: 33655404 DOI: 10.1007/s41061-021-00326-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/08/2021] [Indexed: 01/04/2023]
Abstract
Clusteroluminescence is a phenomenon whereby the aggregation or clustering of non-conjugated electron-rich units leads to the emission of light at long wavelengths. This phenomenon was first discovered in poly(amido amine) (PAMAM) dendrimers. In recent years, clusteroluminescence has attracted growing research interest and its photophysical properties and mechanism have been thoroughly studied. In this review, we first briefly introduce the development of different types of clusteroluminogens. Then we highlight recent developments in clusteroluminescence, including mechanistic studies, the disclosure of room-temperature phosphorescence, and the extension of emission to the longer-wavelength region. Lastly, we demonstrate a few applications in various fields. With advantages such as being earth-abundant, biocompatible and biodegradable, clusteroluminogens are envisioned to be commonplace in the future.
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Affiliation(s)
- Zhaoyu Wang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Haoke Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Siqi Li
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
| | - Dangyuan Lei
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
| | - Ben Zhong Tang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Center for Aggregation-Induced Emission, State Key Laboratory of Luminescent Materials and Devices, SCUT-HKUST Joint Research Institute, South China University of Technology, Guangzhou, 510640, China
- AIE Institute, Guangzhou Development District, Guangzhou, 510530, China
| | - Ruquan Ye
- Department of Chemistry, City University of Hong Kong, Hong Kong, China.
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Dib N, Fernández L, Santo M, Otero L, Alustiza F, Liaudat AC, Bosch P, Lavaggi ML, Cerecetto H, González M. Formation of dendrimer-guest complexes as a strategy to increase the solubility of a phenazine N, N'-dioxide derivative with antitumor activity. Heliyon 2019; 5:e01528. [PMID: 31049437 PMCID: PMC6482317 DOI: 10.1016/j.heliyon.2019.e01528] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 11/22/2018] [Accepted: 04/11/2019] [Indexed: 11/20/2022] Open
Abstract
Poly(amidoamine) and Poly(propylenimine) dendrimers with different generations and peripheral groups were studied as solubility enhancers and nanocarriers for 7-bromo-2-hydroxy-phenazine N5,N10-dioxide. This compound possesses potential antitumoral and anti-trypanosomal activity, but its low solubility in physiological media precludes its possible application as therapeutic drug. The amino terminated dendrimers association with the active compounds as observed trough NMR studies showed that electrostatic interactions are essential in the solubilization enhancement process. The obtaining of a stable and no cytotoxic formulation makes the drug-carried association a suitable strategy for the generation of a drug delivery system for phenazine derivatives.
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Affiliation(s)
- Nahir Dib
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA, Río Cuarto, Argentina
| | - Luciana Fernández
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA, Río Cuarto, Argentina
| | - Marisa Santo
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA, Río Cuarto, Argentina
| | - Luis Otero
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA, Río Cuarto, Argentina
| | - Fabrisio Alustiza
- Grupo de Sanidad Animal, INTA Estación Experimental Agropecuaria Marcos Juárez, X2580, Marcos Juárez, Argentina
| | - Ana Cecilia Liaudat
- Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Agencia Postal 3, X5804BYA, Río Cuarto, Argentina
| | - Pablo Bosch
- Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Agencia Postal 3, X5804BYA, Río Cuarto, Argentina
| | - M Laura Lavaggi
- Departamento de Química Orgánica, Facultad de Química, Facultad de Ciencias, Universidad de la República, 11400, Montevideo, Uruguay
| | - Hugo Cerecetto
- Departamento de Química Orgánica, Facultad de Química, Facultad de Ciencias, Universidad de la República, 11400, Montevideo, Uruguay
| | - Mercedes González
- Departamento de Química Orgánica, Facultad de Química, Facultad de Ciencias, Universidad de la República, 11400, Montevideo, Uruguay
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Priotti J, Leonardi D, Pico G, Lamas MC. Application of Fluorescence Emission for Characterization of Albendazole and Ricobendazole Micellar Systems: Elucidation of the Molecular Mechanism of Drug Solubilization Process. AAPS PharmSciTech 2018; 19:1152-1159. [PMID: 29218582 DOI: 10.1208/s12249-017-0927-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 11/25/2017] [Indexed: 11/30/2022] Open
Abstract
Albendazole (ABZ) and ricobendazole (RBZ) are referred to as class II compounds in the Biopharmaceutical Classification System. These drugs exhibit poor solubility, which profoundly affects their oral bioavailability. Micellar systems are excellent pharmaceutical tools to enhance solubilization and absorption of poorly soluble compounds. Polysorbate 80 (P80), poloxamer 407 (P407), sodium cholate (Na-C), and sodium deoxycholate (Na-DC) have been selected as surfactants to study the solubilization process of these drugs. Fluorescence emission was applied in order to obtain surfactant/fluorophore (S/F) ratio, critical micellar concentration, protection efficiency of micelles, and thermodynamic parameters. Systems were characterized by their size and zeta potential. A blue shift from 350 to 345 nm was observed when ABZ was included in P80, Na-DC, and Na-C micelles, while RBZ showed a slight change in the fluorescence band. P80 showed a significant solubilization capacity: S/F values were 688 for ABZ at pH 4 and 656 for RBZ at pH 6. Additionally, P80 micellar systems presented the smallest size (10 nm) and their size was not affected by pH change. S/F ratio for bile salts was tenfold higher than for the other surfactants. Quenching plots were linear and their constant values (2.17/M for ABZ and 2.29/M for RBZ) decreased with the addition of the surfactants, indicating a protective effect of the micelles. Na-DC showed better protective efficacy for ABZ and RBZ than the other surfactants (constant values 0.54 and 1.57/M, respectively), showing the drug inclusion into the micelles. Entropic parameters were negative in agreement with micelle formation.
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Choudhary S, Gupta L, Rani S, Dave K, Gupta U. Impact of Dendrimers on Solubility of Hydrophobic Drug Molecules. Front Pharmacol 2017; 8:261. [PMID: 28559844 PMCID: PMC5432624 DOI: 10.3389/fphar.2017.00261] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 04/26/2017] [Indexed: 12/31/2022] Open
Abstract
Adequate aqueous solubility has been one of the desired properties while selecting drug molecules and other bio-actives for product development. Often solubility of a drug determines its pharmaceutical and therapeutic performance. Majority of newly synthesized drug molecules fail or are rejected during the early phases of drug discovery and development due to their limited solubility. Sufficient permeability, aqueous solubility and physicochemical stability of the drug are important for achieving adequate bioavailability and therapeutic outcome. A number of different approaches including co-solvency, micellar solubilization, micronization, pH adjustment, chemical modification, and solid dispersion have been explored toward improving the solubility of various poorly aqueous-soluble drugs. Dendrimers, a new class of polymers, possess great potential for drug solubility improvement, by virtue of their unique properties. These hyper-branched, mono-dispersed molecules have the distinct ability to bind the drug molecules on periphery as well as to encapsulate these molecules within the dendritic structure. There are numerous reported studies which have successfully used dendrimers to enhance the solubilization of poorly soluble drugs. These promising outcomes have encouraged the researchers to design, synthesize, and evaluate various dendritic polymers for their use in drug delivery and product development. This review will discuss the aspects and role of dendrimers in the solubility enhancement of poorly soluble drugs. The review will also highlight the important and relevant properties of dendrimers which contribute toward drug solubilization. Finally, hydrophobic drugs which have been explored for dendrimer assisted solubilization, and the current marketing status of dendrimers will be discussed.
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Affiliation(s)
| | | | | | | | - Umesh Gupta
- Department of Pharmacy, School of Chemical Sciences and Pharmacy, Central University of RajasthanKishangarh, India
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Dib N, Reviglio AL, Fernández L, Morales G, Santo M, Otero L, Alustiza F, Liaudat AC, Bosch P, Calderón M, Martinelli M, Strumia M. Formation and characterization of Langmuir and Langmuir-Blodgett films of Newkome-type dendrons in presence and absence of a therapeutic compound, for the development of surface mediated drug delivery systems. J Colloid Interface Sci 2017; 496:243-253. [PMID: 28235718 DOI: 10.1016/j.jcis.2017.02.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/14/2017] [Accepted: 02/14/2017] [Indexed: 12/20/2022]
Abstract
Organic macromolecules with dendrimeric architectures are polymeric materials potentially useful as nanocarriers for therapeutic drugs. In this work, we evaluate a series of Newkome-type dendrons in Langmuir and Langmuir-Blodgett films as platforms capable of interacting with a potential antitumoral agent. The nanocomposite is proposed as model for the development of surface mediated drug delivery systems. We were successful in the formation and characterization of pure (dendrons) and composite (drug-dendron) stable and reproducible monolayers, and their transfer to solid substrates. A detailed study of topographic characteristics of the generated surfaces by atomic force microscopy was conducted. Furthermore, we probed dendron monolayer films as anchorage surfaces for mammalian cells. Normal cell attachment and proliferation on the surfaces were observed. No evident cytotoxic effects were detected, demonstrating the adequate biocompatibility of the surfaces.
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Affiliation(s)
- Nahir Dib
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA Río Cuarto, Argentina
| | - Ana Lucia Reviglio
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA Río Cuarto, Argentina
| | - Luciana Fernández
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA Río Cuarto, Argentina
| | - Gustavo Morales
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA Río Cuarto, Argentina
| | - Marisa Santo
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA Río Cuarto, Argentina
| | - Luis Otero
- Departamento de Física, Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, Agencia Postal 3, X5804BYA Río Cuarto, Argentina.
| | - Fabrisio Alustiza
- Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Agencia Postal 3, X5804BYA Río Cuarto, Argentina
| | - Ana Cecilia Liaudat
- Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Agencia Postal 3, X5804BYA Río Cuarto, Argentina
| | - Pablo Bosch
- Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Agencia Postal 3, X5804BYA Río Cuarto, Argentina
| | - Marcelo Calderón
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Marisa Martinelli
- IPQA-CONICET, Departamento de Química Orgánica, Facultad Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Edificio de Cs. II, Ciudad Universitaria, Córdoba 5000, Argentina
| | - Miriam Strumia
- IPQA-CONICET, Departamento de Química Orgánica, Facultad Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Edificio de Cs. II, Ciudad Universitaria, Córdoba 5000, Argentina
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Ferreira MJG, García A, Leonardi D, Salomon CJ, Lamas MC, Nunes TG. 13C and 15N solid-state NMR studies on albendazole and cyclodextrin albendazole complexes. Carbohydr Polym 2015; 123:130-5. [DOI: 10.1016/j.carbpol.2015.01.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/10/2015] [Accepted: 01/19/2015] [Indexed: 11/24/2022]
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Dib N, Fernández L, Otero L, Santo M, Calderón M, Martinelli M, Strumia M. First generation newkome-type dendrimer as solubility enhancer of antitumor benzimidazole carbamate. J INCL PHENOM MACRO 2015. [DOI: 10.1007/s10847-015-0497-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Evaluation of different PAMAM dendrimers as molecular vehicle of 1,2,4-triazine N-oxide derivative with potential antitumor activity. J INCL PHENOM MACRO 2013. [DOI: 10.1007/s10847-013-0324-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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