1
|
Tang Q, Liu D, Chen H, He D, Pan W, Li Q, Xie W, Chen S, Yu C. Functionalized PAMAM-Based system for targeted delivery of miR-205 and 5-fluorouracil in breast cancer. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2021.102959] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
2
|
Buczkowski A. Thermodynamic study of pH and sodium chloride impact on gemcitabine binding to cucurbit[7]uril in aqueous solutions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
3
|
Calorimetric and spectroscopic studies of interactions of PPI G4 dendrimer with tegafur in aqueous solutions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
4
|
Ramos MC, Horta BAC. Drug-Loading Capacity of PAMAM Dendrimers Encapsulating Quercetin Molecules: A Molecular Dynamics Study with the 2016H66 Force Field. J Chem Inf Model 2021; 61:987-1000. [PMID: 33502188 DOI: 10.1021/acs.jcim.0c00960] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The complexation of quercetin molecules with poly(amidoamine) (PAMAM) dendrimers of generation 0-3 was studied by molecular dynamics simulations. Three main points were addressed: (i) the effect of starting from different initial structures; (ii) the performance of the 2016H66 force field (recently validated in the context of dendrimer simulations) in predicting the experimental drug(quercetin)-loading capacity of PAMAM dendrimers; and (iii) the stability of quercetin-PAMAM complexes and their interactions. Initial structures generated by different restraint protocols led to faster convergence compared to initial structures generated by randomly placing the drug molecules in the simulation box. The simulations yielded meta-stable complexes where the loading numbers have converged to average values and were compared to experimentally obtained values. Once the first meta-stable state was reached, the drug-dendrimer complexes did not deviate significantly throughout the simulation. They were characterized in terms of structural properties, such as the radius of gyration and radial distribution functions. The results suggest that quercetin molecules interact mostly with the internal dendrimer monomers rather than to their surface.
Collapse
Affiliation(s)
- Mayk C Ramos
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Bruno A C Horta
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| |
Collapse
|
5
|
Optimization and computational studies evaluating molecular dynamics of EDA cored polymeric dendrimer. Sci Rep 2020; 10:21977. [PMID: 33319804 PMCID: PMC7738488 DOI: 10.1038/s41598-020-77540-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 10/09/2020] [Indexed: 12/03/2022] Open
Abstract
In this work we report the results acquired from molecular dynamics simulations as well as the optimization of different generations of polyamidoamine dendrimer. The analysis data revealed synthesized dendrimer as a suitable nanostructured candidate suitable for neutral as well as charged molecule delivery due to the presence of both electrostatic potential and van der Waals forces. The methyl ester terminating groups of half-generation dendrimers with characteristic IR peaks for carbonyl at 1670.41 cm−1 tends to shift to 1514.17 cm−1 on conversion to amide group of full-generation dendrimer. The study includes the usage of detailed analysis, demonstrating how molecular dynamics affect the dendrimer complexation. The present investigations provide an unprecedented insight into the computational and experimental system that may be of general significance for the clinical application of dendrimers.
Collapse
|
6
|
Spectroscopic, electrochemical and calorimetric studies on the interactions of poly(propyleneimine) G4 dendrimer with 5-fluorouracil in aqueous solutions. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
7
|
Jiang K, Chen J, Tai L, Liu C, Chen X, Wei G, Lu W, Pan W. Inhibition of post-trabeculectomy fibrosis via topically instilled antisense oligonucleotide complexes co-loaded with fluorouracil. Acta Pharm Sin B 2020; 10:1754-1768. [PMID: 33088694 PMCID: PMC7563997 DOI: 10.1016/j.apsb.2020.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/17/2020] [Accepted: 02/27/2020] [Indexed: 12/25/2022] Open
Abstract
Trabeculectomy is the mainstay of surgical glaucoma treatment, while the success rate was unsatisfying due to postoperative scarring of the filtering blebs. Clinical countermeasures for scar prevention are intraoperative intervention or repeated subconjunctival injections. Herein, we designed a co-delivery system capable of transporting fluorouracil and anti-TGF-β2 oligonucleotide to synergistically inhibit fibroblast proliferation via topical instillation. This co-delivery system was built based on a cationic dendrimer core (PAMAM), which encapsulated fluorouracil within hydrophobic cavity and condensed oligonucleotide with surface amino groups, and was further modified with hyaluronic acid and cell-penetrating peptide penetratin. The co-delivery system was self-assembled into nanoscale complexes with increased cellular uptake and enabled efficient inhibition on proliferation of fibroblast cells. In vivo studies on rabbit trabeculectomy models further confirmed the anti-fibrosis efficiency of the complexes, which prolonged survival time of filtering blebs and maintained their height and extent during wound healing process, exhibiting an equivalent effect on scar prevention compared to intraoperative infiltration with fluorouracil. Qualitative observation by immunohistochemistry staining and quantitative analysis by Western blotting both suggested that TGF-β2 expression was inhibited by the co-delivery complexes. Our study provided a potential approach promising to guarantee success rate of trabeculectomy and prolong survival time of filtering blebs.
Collapse
Key Words
- ASO, antisense oligonucleotide
- DAPI, 4′,6-diamidino-2-phenylindole
- DLS, dynamic light scattering
- EE, encapsulation efficiency
- EGF, epidermal growth factor
- FAM, 6-carboxyfluorescein
- FBS, fetal bovine serum
- FITC, fluorescein 5-isothiocyanate
- Fibrosis prevention
- Fluorouracil
- Fu, fluorouracil
- GAPDH, glyceraldehyde-3-phosphate dehydrogenase
- Gene delivery
- HA, hyaluronic acid
- HRP, horseradish peroxidase
- IBAGS, the Indiana Bleb Appearance Grading Scale
- IOP, intraocular pressure
- L929, murine fibroblast cells
- MWCO, molecular weight cut-off
- PAGE, polyacrylamide gel electrophoresis
- PAMAM, poly(amidoamine)
- PEI, polyethylenimine
- PG5, PAMAM G5–NH2
- PLGA, poly(lactic-co-glycolic acid)
- PVDF, polyvinylidene difluoride
- Pene, penetratin
- Penetratin
- SDHCEC, human corneal epithelial cells
- SDS, sodium dodecyl sulfate
- TEM, transmission electron microscope
- TGF-β, transforming growth factor-β
- Trabeculectomy
Collapse
Affiliation(s)
- Kuan Jiang
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Junyi Chen
- Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
| | - Lingyu Tai
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Chang Liu
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Xishan Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Gang Wei
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
- The Institutes of Integrative Medicine of Fudan University, Shanghai 200040, China
- Shanghai Engineering Research Center of Immunotherapeutics, Shanghai 201203, China
- Corresponding authors. Tel.: +86 21 51980091, fax: +86 21 51980090 (Gang Wei); Tel.: +86 24 23986313, fax: +86 24 23953241 (Weisan Pan).
| | - Weiyue Lu
- Key Laboratory of Smart Drug Delivery, Ministry of Education; Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
- The Institutes of Integrative Medicine of Fudan University, Shanghai 200040, China
| | - Weisan Pan
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
- Corresponding authors. Tel.: +86 21 51980091, fax: +86 21 51980090 (Gang Wei); Tel.: +86 24 23986313, fax: +86 24 23953241 (Weisan Pan).
| |
Collapse
|
8
|
The Role of Branch Cell Symmetry and Other Critical Nanoscale Design Parameters in the Determination of Dendrimer Encapsulation Properties. Biomolecules 2020; 10:biom10040642. [PMID: 32326311 PMCID: PMC7226492 DOI: 10.3390/biom10040642] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/27/2020] [Accepted: 03/21/2020] [Indexed: 12/23/2022] Open
Abstract
This article reviews progress over the past three decades related to the role of dendrimer-based, branch cell symmetry in the development of advanced drug delivery systems, aqueous based compatibilizers/solubilizers/excipients and nano-metal cluster catalysts. Historically, it begins with early unreported work by the Tomalia Group (i.e., The Dow Chemical Co.) revealing that all known dendrimer family types may be divided into two major symmetry categories; namely: Category I: symmetrical branch cell dendrimers (e.g., Tomalia, Vögtle, Newkome-type dendrimers) possessing interior hollowness/porosity and Category II: asymmetrical branch cell dendrimers (e.g., Denkewalter-type) possessing no interior void space. These two branch cell symmetry features were shown to be pivotal in directing internal packing modes; thereby, differentiating key dendrimer properties such as densities, refractive indices and interior porosities. Furthermore, this discovery provided an explanation for unimolecular micelle encapsulation (UME) behavior observed exclusively for Category I, but not for Category II. This account surveys early experiments confirming the inextricable influence of dendrimer branch cell symmetry on interior packing properties, first examples of Category (I) based UME behavior, nuclear magnetic resonance (NMR) protocols for systematic encapsulation characterization, application of these principles to the solubilization of active approved drugs, engineering dendrimer critical nanoscale design parameters (CNDPs) for optimized properties and concluding with high optimism for the anticipated role of dendrimer-based solubilization principles in emerging new life science, drug delivery and nanomedical applications.
Collapse
|
9
|
Buczkowski A, Palecz B, Schroeder G. Stoichiometry and thermodynamics of gemcitabine and cucurbituril Q7 supramolecular complexes in high acidic aqueous solution. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.10.077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
10
|
Tokarczyk K, Jachimska B. Characterization of G4 PAMAM dendrimer complexes with 5-fluorouracil and their interactions with bovine serum albumin. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.10.080] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
11
|
Polyamidoamine Dendrimers for Enhanced Solubility of Small Molecules and Other Desirable Properties for Site Specific Delivery: Insights from Experimental and Computational Studies. Molecules 2018; 23:molecules23061419. [PMID: 29895742 PMCID: PMC6100328 DOI: 10.3390/molecules23061419] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 06/06/2018] [Accepted: 06/07/2018] [Indexed: 01/05/2023] Open
Abstract
Clinical applications of many small molecules are limited due to poor solubility and lack of controlled release besides lack of other desirable properties. Experimental and computational studies have reported on the therapeutic potential of polyamidoamine (PAMAM) dendrimers as solubility enhancers in pre-clinical and clinical settings. Besides formulation strategies, factors such as pH, PAMAM dendrimer generation, PAMAM dendrimer concentration, nature of the PAMAM core, special ligand and surface modifications of PAMAM dendrimer have an influence on drug solubility and other recommendable pharmacological properties. This review, therefore, compiles the recently reported applications of PAMAM dendrimers in pre-clinical and clinical uses as enhancers of solubility and other desirable properties such as sustained and controlled release, bioavailability, bio-distribution, toxicity reduction or enhancement, and targeted delivery of small molecules with emphasis on cancer treatment.
Collapse
|
12
|
Amariei G, Boltes K, Letón P, Iriepa I, Moraleda I, Rosal R. Poly(amidoamine) dendrimers grafted on electrospun poly(acrylic acid)/poly(vinyl alcohol) membranes for host-guest encapsulation of antioxidant thymol. J Mater Chem B 2017; 5:6776-6785. [PMID: 32264327 DOI: 10.1039/c7tb01498h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Amino-terminated fifth generation poly(amidoamine) (PAMAM G5-NH2) dendrimers were grafted onto the surface of poly(acrylic acid)/poly(vinyl alcohol) (PAA/PVA) electrospun fibres with the purpose of creating a host-guest architecture for the controlled delivery of a natural antioxidant, thymol. The nanofibers were stabilized by esterification crosslinking to produce a water insoluble non-woven membrane. The functionalization with PAMAM G5-NH2 led to dendrimer loadings in the 7.4 × 10-7-2.25 × 10-6 mol dendrimer per g membrane range. The resulting materials were characterized using SEM, ATR-FTIR and surface ζ-potential measurements. The loading capacity for thymol reached 2.5 × 10-4 mol thymol per g membrane. The membranes were tested for thymol release in different aqueous and non-aqueous food simulants. Computational modelling was used to get a further insight into the host-guest association of thymol and PAMAM G5-NH2 molecules through docking studies. For this purpose, we examined the molecular level details of the dendrimer-guest complex, calculated the number of included or attached molecules, the exact location of thymol in host-guest complexes and the local environment around the thymol molecules. Docking studies showed that PAMAM-G5-NH2 dendrimers can encapsulate thymol molecules through hydrophobic interactions and hydrogen bonding. The maximum amount of thymol molecules theoretically encapsulated was 16, while another 25 could be hosted at the dendrimer surface through interaction with the outer part or the dendritic branches. The experimental value was 37 ± 5, in agreement with theoretical predictions.
Collapse
Affiliation(s)
- Georgiana Amariei
- Department of Chemical Engineering, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain.
| | | | | | | | | | | |
Collapse
|
13
|
Xu L, Cooper RC, Wang J, Yeudall WA, Yang H. Synthesis and Application of Injectable Bioorthogonal Dendrimer Hydrogels for Local Drug Delivery. ACS Biomater Sci Eng 2017; 3:1641-1653. [PMID: 29147682 DOI: 10.1021/acsbiomaterials.7b00166] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We developed novel dendrimer hydrogels (DH)s on the basis of bioorthogonal chemistry, in which polyamidoamine (PAMAM) dendrimer generation 4.0 (G4) functionalized with strained alkyne dibenzocyclooctyne (DBCO) via PEG spacer (Mn = 2,000 g/mol) underwent strain-promoted azide-alkyne cycloaddition (SPAAC) with polyethylene glycol bisazide (PEG-BA) (Mn= 20,000 g/mol) to generate a dendrimer-PEG cross-linked network. This platform offers a high degree of functionality and modularity. A wide range of structural parameters including dendrimer generation, degree of PEGylation, loading density of clickable DBCO groups, PEG-BA chain length as well as the ratio of clickable dendrimer to PEG-BA and their concentrations can be readily manipulated to tune chemical and physical properties of DHs. We used this platform to prepare an injectable liquid DH. This bioorthogonal DH exhibited high cytocompatibility and enabled sustained release of the anticancer drug 5-fluorouracil (5-FU). Following intratumoral injection, the DH/5-FU formulation significantly suppressed tumor growth and improved survival of HN12 tumor-bearing mice by promoting tumor cell death as well as by reducing tumor cell proliferation and angiogenesis.
Collapse
Affiliation(s)
- Leyuan Xu
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, 737 North 5 Street, Richmond, Virginia 23219, United States
| | - Remy C Cooper
- Department of Biomedical Engineering, 601 West Main Street, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Juan Wang
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, 737 North 5 Street, Richmond, Virginia 23219, United States
| | - W Andrew Yeudall
- Department of Oral Biology, Augusta University, 1120 15 Street, Augusta, Georgia 30912, United States.,Molecular Oncology and Biomarkers Program, Georgia Cancer Center, 1410 Laney Walker Blvd, Augusta University, Augusta, Georgia 30912, United States
| | - Hu Yang
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, 737 North 5 Street, Richmond, Virginia 23219, United States.,Department of Pharmaceutics, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States.,Massey Cancer Center, Virginia Commonwealth University, 401 College Street, Richmond, Virginia 23298, United States
| |
Collapse
|
14
|
Gorzkiewicz M, Klajnert-Maculewicz B. Dendrimers as nanocarriers for nucleoside analogues. Eur J Pharm Biopharm 2017; 114:43-56. [DOI: 10.1016/j.ejpb.2016.12.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 10/02/2016] [Accepted: 12/14/2016] [Indexed: 10/20/2022]
|
15
|
Buczkowski A, Urbaniak P, Piekarski H, Palecz B. Spectroscopic and calorimetric studies on the interaction between PAMAM G4-OH and 5-fluorouracil in aqueous solutions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 171:401-405. [PMID: 27569773 DOI: 10.1016/j.saa.2016.08.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/08/2016] [Accepted: 08/16/2016] [Indexed: 06/06/2023]
Abstract
The results of spectroscopic measurements (an increase in solubility, equilibrium dialysis, 1H NMR titration) and calorimetric measurements (isothermal titration ITC) indicate spontaneous (ΔG<0) binding of 5-fluorouracil molecules by PAMAM G4-OH dendrimer with terminal hydroxyl groups in an aqueous solution. PAMAM G4-OH dendrimer bonds about n=8±1 molecules of the drug with an equilibrium constant of K=70±10. The process of saturating the dendrimer active sites by the drug molecules is exothermal (ΔH<0) and is accompanied by an advantageous change in entropy (ΔS>0). The parameters of binding 5-fluorouracil by PAMAM G4-OH dendrimer were compared with those of binding this drug by the macromolecules of PAMAM G3-OH and G5-OH.
Collapse
Affiliation(s)
- Adam Buczkowski
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 165, Lodz 90-236, Poland.
| | - Pawel Urbaniak
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403 Lodz, Poland
| | - Henryk Piekarski
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 165, Lodz 90-236, Poland
| | - Bartlomiej Palecz
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 165, Lodz 90-236, Poland.
| |
Collapse
|
16
|
Docosahexaenoic acid triglyceride-based microemulsions with an added dendrimer – Structural considerations. J Colloid Interface Sci 2016; 483:374-384. [DOI: 10.1016/j.jcis.2016.08.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 08/11/2016] [Accepted: 08/12/2016] [Indexed: 12/22/2022]
|
17
|
Palecz B, Buczkowski A, Piekarski H, Kılınçarslan Ö. Thermodynamic Interaction between PAMAM G4-NH2, G4-OH, G3.5-COONa Dendrimers and Gemcitabine in Water Sotutions. INTERNATIONAL JOURNAL OF SECONDARY METABOLITE 2016. [DOI: 10.21448/ijsm.240699] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
18
|
Buczkowski A, Waliszewski D, Urbaniak P, Palecz B. Study of the interactions of PAMAM G3-NH 2 and G3-OH dendrimers with 5‐fluorouracil in aqueous solutions. Int J Pharm 2016; 505:1-13. [DOI: 10.1016/j.ijpharm.2016.03.061] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 03/28/2016] [Accepted: 03/29/2016] [Indexed: 02/07/2023]
|
19
|
Sonawane SJ, Kalhapure RS, Rambharose S, Mocktar C, Vepuri SB, Soliman M, Govender T. Ultra-small lipid-dendrimer hybrid nanoparticles as a promising strategy for antibiotic delivery: In vitro and in silico studies. Int J Pharm 2016; 504:1-10. [PMID: 26992817 DOI: 10.1016/j.ijpharm.2016.03.021] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 03/13/2016] [Indexed: 11/19/2022]
Abstract
The purpose of this study was to explore the preparation of a new lipid-dendrimer hybrid nanoparticle (LDHN) system to effectively deliver vancomycin against methicillin-resistant Staphylococcus aureus (MRSA) infections. Spherical LDHNs with particle size, polydispersity index and zeta potential of 52.21±0.22 nm, 0.105±0.01, and -14.2±1.49 mV respectively were prepared by hot stirring and ultrasonication using Compritol 888 ATO, G4 PAMAM- succinamic acid dendrimer, and Kolliphor RH-40. Vancomycin encapsulation efficiency (%) in LDHNs was almost 4.5-fold greater than in lipid-polymer hybrid nanoparticles formulated using Eudragit RS 100. Differential scanning calorimetry and Fourier transform-infrared studies confirmed the formation of LDHNs. The interactions between the drug-dendrimer complex and lipid molecules using in silico modeling revealed the molecular mechanism behind the enhanced encapsulation and stability. Vancomycin was released from LDHNs over the period of 72 h with zero order kinetics and super case II transport mechanism. The minimum inhibitory concentration (MIC) against S. aureus and MRSA were 15.62 μg/ml and 7.81 μg/ml respectively. Formulation showed sustained activity with MIC of 62.5 μg/ml against S. aureus and 500 μg/ml against MRSA at the end of 72 and 54 h period respectively. The results suggest that the LDHN system can be an effective strategy to combat resistant infections.
Collapse
Affiliation(s)
- Sandeep J Sonawane
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001 Durban, 4000, South Africa
| | - Rahul S Kalhapure
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001 Durban, 4000, South Africa.
| | - Sanjeev Rambharose
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001 Durban, 4000, South Africa
| | - Chunderika Mocktar
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001 Durban, 4000, South Africa
| | - Suresh B Vepuri
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001 Durban, 4000, South Africa
| | - Mahmoud Soliman
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001 Durban, 4000, South Africa
| | - Thirumala Govender
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001 Durban, 4000, South Africa.
| |
Collapse
|
20
|
Mukherjee J, Wong PT, Tang S, Gam K, Coulter A, Baker JR, Choi SK. Mechanism of Cooperativity and Nonlinear Release Kinetics in Multivalent Dendrimer–Atropine Complexes. Mol Pharm 2015; 12:4498-508. [DOI: 10.1021/acs.molpharmaceut.5b00684] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jhindan Mukherjee
- Michigan
Nanotechnology Institute
for Medicine and Biological Sciences, and Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Pamela T. Wong
- Michigan
Nanotechnology Institute
for Medicine and Biological Sciences, and Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Shengzhuang Tang
- Michigan
Nanotechnology Institute
for Medicine and Biological Sciences, and Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Kristina Gam
- Michigan
Nanotechnology Institute
for Medicine and Biological Sciences, and Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alexa Coulter
- Michigan
Nanotechnology Institute
for Medicine and Biological Sciences, and Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - James R. Baker
- Michigan
Nanotechnology Institute
for Medicine and Biological Sciences, and Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Seok Ki Choi
- Michigan
Nanotechnology Institute
for Medicine and Biological Sciences, and Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| |
Collapse
|