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Sabbagh F, Deshmukh AR, Choi Y, Kim BS. Effect of Microsphere Concentration on Catechin Release from Microneedle Arrays. ACS APPLIED MATERIALS & INTERFACES 2024; 16:28276-28289. [PMID: 38788676 DOI: 10.1021/acsami.4c06064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
In this work, microspheres were developed by cross-linking glutaraldehyde in an aqueous gelatin solution with a surfactant and solvent. A poly(vinyl alcohol) (PVA) solution was produced and combined with catechin-loaded microspheres. Different microsphere concentrations (0%, 5%, 10%, and 15%) were applied to the PVA microneedles. The moisture content, particle size, swelling, and drug release percentage of microneedles were studied using various microsphere concentrations. Fourier transform infrared and scanning electron microscopy (SEM) investigations validated the structure of gelatin microspheres as well as their decoration in microneedles. The SEM scans revealed that spherical microspheres with a wrinkled and folded morphology were created, with no physical holes visible on the surface. The gelatin microspheres generated had a mean particle size of 20-30 μm. Ex vivo release analysis indicated that microneedles containing 10% microspheres released the most catechin, with 42.9% at 12 h and 84.4% at 24 h.
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Affiliation(s)
- Farzaneh Sabbagh
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Aarti R Deshmukh
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Yoseok Choi
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Beom Soo Kim
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
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Borcan F, Len A, Dehelean CA, Dudás Z, Ghiulai R, Iftode A, Racoviceanu R, Soica CM. Design and Assessment of a Polyurethane Carrier Used for the Transmembrane Transfer of Acyclovir. NANOMATERIALS 2020; 11:nano11010051. [PMID: 33379150 PMCID: PMC7823466 DOI: 10.3390/nano11010051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 02/07/2023]
Abstract
THE Herpes simplex viruses (HSV-1, HSV-2) are responsible for a wide variety of conditions, from cutaneous-mucosal to central nervous system (CNS) infections and occasional infections of the visceral organs, some of them with a lethal end. Acyclovir is often used intravenously, orally, or locally to treat herpetic infections but it must be administered with caution to patients with kidney disease and to children of early age. The main objectives of this study were to synthesize and evaluate new polyurethane nanoparticles that might be used as proper transmembrane carriers for acyclovir. Polyurethane particles were obtained by a polyaddition process: a mixture of two aliphatic diisocyanates used as organic phase was added to a mixture of butanediol and polyethylene glycol used as aqueous phase. Two different samples (with and without acyclovir, respectively) were synthesized and characterized by UV-Vis spectra in order to assess the encapsulation efficacy and the release profile, FT-IR, DSC, SEM, and SANS for structural characterization, as well as skin irritation tests. Nearly homogeneous samples with particle sizes between 78 and 91 nm have been prepared and characterized revealing a medium tendency to form clusters and a high resistance to heat up to 300 °C. The release profile of these nanoparticles is characteristic to a drug delivery system with a late discharge of the loaded active agents. Very slight increases in the level of transepidermal water loss and erythema were found in a 15-day evaluation on human skin. The results suggest the synthesis of a non-irritative carrier with a high encapsulation efficacy that can be successfully used for the transmembrane transfer of acyclovir.
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Affiliation(s)
- Florin Borcan
- Department I, Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, 300041 Timisoara, Romania;
| | - Adél Len
- Neutron Spectroscopy Department, Centre for Energy Research, H-1121 Budapest, Hungary;
- Faculty of Engineering and Information Technology, University of Pécs, H-7624 Pécs, Hungary
| | - Cristina A. Dehelean
- Department II, Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, 300041 Timisoara, Romania; (C.A.D.); (A.I.); (R.R.); (C.M.S.)
| | - Zoltán Dudás
- Neutron Spectroscopy Department, Centre for Energy Research, H-1121 Budapest, Hungary;
- “Coriolan Drăgulescu” Institute of Chemistry, 300223 Timisoara, Romania
- Correspondence: (Z.D.); (R.G.); Tel.: +36-1-392-2222/1849 (Z.D.); +40-723-326-823 (R.G.)
| | - Roxana Ghiulai
- Department II, Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, 300041 Timisoara, Romania; (C.A.D.); (A.I.); (R.R.); (C.M.S.)
- Correspondence: (Z.D.); (R.G.); Tel.: +36-1-392-2222/1849 (Z.D.); +40-723-326-823 (R.G.)
| | - Andrada Iftode
- Department II, Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, 300041 Timisoara, Romania; (C.A.D.); (A.I.); (R.R.); (C.M.S.)
| | - Roxana Racoviceanu
- Department II, Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, 300041 Timisoara, Romania; (C.A.D.); (A.I.); (R.R.); (C.M.S.)
| | - Codruta M. Soica
- Department II, Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, 300041 Timisoara, Romania; (C.A.D.); (A.I.); (R.R.); (C.M.S.)
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de Sousa Victor R, Marcelo da Cunha Santos A, Viana de Sousa B, de Araújo Neves G, Navarro de Lima Santana L, Rodrigues Menezes R. A Review on Chitosan's Uses as Biomaterial: Tissue Engineering, Drug Delivery Systems and Cancer Treatment. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4995. [PMID: 33171898 PMCID: PMC7664280 DOI: 10.3390/ma13214995] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/24/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022]
Abstract
Chitosan, derived from chitin, is a biopolymer consisting of arbitrarily distributed β-(1-4)-linked D-glucosamine and N-acetyl-D-glucosamine that exhibits outstanding properties- biocompatibility, biodegradability, non-toxicity, antibacterial activity, the capacity to form films, and chelating of metal ions. Most of these peculiar properties are attributed to the presence of free protonable amino groups along the chitosan backbone, which also gives it solubility in acidic conditions. Moreover, this biopolymer can also be physically modified, thereby presenting a variety of forms to be developed. Consequently, this polysaccharide is used in various fields, such as tissue engineering, drug delivery systems, and cancer treatment. In this sense, this review aims to gather the state-of-the-art concerning this polysaccharide when used as a biomaterial, providing information about its characteristics, chemical modifications, and applications. We present the most relevant and new information about this polysaccharide-based biomaterial's applications in distinct fields and also the ability of chitosan and its various derivatives to selectively permeate through the cancer cell membranes and exhibit anticancer activity, and the possibility of adding several therapeutic metal ions as a strategy to improve the therapeutic potential of this polymer.
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Affiliation(s)
- Rayssa de Sousa Victor
- Graduate Program in Materials Science and Engineering, Laboratory of Materials Technology (LTM), Federal University of Campina Grande, Campina Grande 58429-900, Brazil
- Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil; (G.d.A.N.); (L.N.d.L.S.); (R.R.M.)
| | - Adillys Marcelo da Cunha Santos
- Center for Science and Technology in Energy and Sustainability (CETENS), Federal University of Recôncavo da Bahia (UFRB), Feira de Santana 44042-280, Brazil;
| | - Bianca Viana de Sousa
- Department of Chemical Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil;
| | - Gelmires de Araújo Neves
- Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil; (G.d.A.N.); (L.N.d.L.S.); (R.R.M.)
| | - Lisiane Navarro de Lima Santana
- Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil; (G.d.A.N.); (L.N.d.L.S.); (R.R.M.)
| | - Romualdo Rodrigues Menezes
- Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil; (G.d.A.N.); (L.N.d.L.S.); (R.R.M.)
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Rosellini E, Barbani N, Frati C, Madeddu D, Massai D, Morbiducci U, Lazzeri L, Falco A, Graiani G, Lagrasta C, Audenino A, Cascone MG, Quaini F. IGF-1 loaded injectable microspheres for potential repair of the infarcted myocardium. J Biomater Appl 2020; 35:762-775. [PMID: 32772783 DOI: 10.1177/0885328220948501] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The use of injectable scaffolds to repair the infarcted heart is receiving great interest. Thermosensitive polymers, in situ polymerization, in situ cross-linking, and self-assembling peptides are the most investigated approaches to obtain injectability.Aim of the present work was the preparation and characterization of a novel bioactive scaffold, in form of injectable microspheres, for cardiac repair. Gellan/gelatin microspheres were prepared by a water-in-oil emulsion and loaded by adsorption with Insulin-like growth factor 1 to promote tissue regeneration. Obtained microspheres underwent morphological, physicochemical and biological characterization, including cell culture tests in static and dynamic conditions and in vivo tests. Morphological analysis of the microspheres showed a spherical shape, a microporous surface and an average diameter of 66 ± 17µm (under dry conditions) and 123 ± 24 µm (under wet conditions). Chemical Imaging analysis pointed out a homogeneous distribution of gellan, gelatin and Insulin-like growth factor-1 within the microsphere matrix. In vitro cell culture tests showed that the microspheres promoted rat cardiac progenitor cells adhesion, and cluster formation. After dynamic suspension culture within an impeller-free bioreactor, cells still adhered to microspheres, spreading their cytoplasm over microsphere surface. Intramyocardial administration of microspheres in a cryoinjury rat model attenuated chamber dilatation, myocardial damage and fibrosis and improved cell homing.Overall, the findings of this study confirm that the produced microspheres display morphological, physicochemical, functional and biological properties potentially adequate for future applications as injectable scaffold for cardiac tissue engineering.
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Affiliation(s)
| | - Niccoletta Barbani
- Department of Civil and Industrial Engineering, University of Pisa, Pisa, Italy
| | - Caterina Frati
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Denise Madeddu
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Diana Massai
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, Italy
| | - Umberto Morbiducci
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, Italy
| | - Luigi Lazzeri
- Department of Civil and Industrial Engineering, University of Pisa, Pisa, Italy
| | - Angela Falco
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Gallia Graiani
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Costanza Lagrasta
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Alberto Audenino
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, Italy
| | | | - Federico Quaini
- Department of Medicine and Surgery, University of Parma, Parma, Italy
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Venkateskumar K, Parasuraman S, Gunasunderi R, Sureshkumar K, Nayak MM, Shah SAA, Khoo K, Kai HW. Acyclovir-Polyethylene Glycol 6000 Binary Dispersions: Mechanistic Insights. AAPS PharmSciTech 2017; 18:2085-2094. [PMID: 28004342 DOI: 10.1208/s12249-016-0686-9] [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: 07/29/2016] [Accepted: 12/02/2016] [Indexed: 11/30/2022] Open
Abstract
The dissolution and subsequent oral bioavailability of acyclovir (ACY) is limited by its poor aqueous solubility. An attempt has been made in this work to provide mechanistic insights into the solubility enhancement and dissolution of ACY by using the water-soluble carrier polyethylene glycol 6000 (PEG6000). Solid dispersions with varying ratios of the drug (ACY) and carrier (PEG6000) were prepared and evaluated by phase solubility, in vitro release studies, kinetic analysis, in situ perfusion, and in vitro permeation studies. Solid state characterization was done by powder X-ray diffraction (XRD), differential scanning calorimetry (DSC), and Fourier transform infrared (FTIR) analysis, and surface morphology was assessed by polarizing microscopic image analysis, scanning electron microscopy, atomic force microscopy, and nuclear magnetic resonance analysis. Thermodynamic parameters indicated the solubilization effect of the carrier. The aqueous solubility and dissolution of ACY was found to be higher in all samples. The findings of XRD, DSC, FTIR and NMR analysis confirmed the formation of solid solution, crystallinity reduction, and the absence of interaction between the drug and carrier. SEM and AFM analysis reports ratified the particle size reduction and change in the surface morphology in samples. The permeation coefficient and amount of ACY diffused were higher in samples in comparison to pure ACY. Stability was found to be higher in dispersions. The results suggest that the study findings provided clear mechanical insights into the solubility and dissolution enhancement of ACY in PEG6000, and such findings could lay the platform for resolving the poor aqueous solubility issues in formulation development.
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Abstract
The use of biomaterials composed of organic pristine components has been successfully described in several purposes, such as tissue engineering and drug delivery. Drug delivery systems (DDS) have shown several advantages over traditional drug therapy, such as greater therapeutic efficacy, prolonged delivery profile, and reduced drug toxicity, as evidenced by in vitro and in vivo studies as well as clinical trials. Despite that, there is no perfect delivery carrier, and issues such as undesirable viscosity and physicochemical stability or inability to efficiently encapsulate hydrophilic/hydrophobic molecules still persist, limiting DDS applications. To overcome that, biohybrid systems, originating from the synergistic assembly of polymers and other organic materials such as proteins and lipids, have recently been described, yielding molecularly planned biohybrid systems that are able to optimize structures to easily interact with the targets. This work revised the biohybrid DDS clarifying their advantages, limitations, and future perspectives in an attempt to contribute to further research of innovative and safe biohybrid polymer-based system as biomaterials for the sustained release of active molecules.
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Lima DDS, Gullon B, Cardelle-Cobas A, Brito LM, Rodrigues KAF, Quelemes PV, Ramos-Jesus J, Arcanjo DDR, Plácido A, Batziou K, Quaresma P, Eaton P, Delerue-Matos C, Carvalho FAA, da Silva DA, Pintado M, Leite JRDSA. Chitosan-based silver nanoparticles: A study of the antibacterial, antileishmanial and cytotoxic effects. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911516681329] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Silver nanoparticles have been studied as an alternative for treatment of microbial infections and leishmaniasis, without promoting induction of microbial or parasite resistance. In this study, chitosan-based silver nanoparticles were synthesized from silver nitrate (AgNO3), sodium borohydride as a reducing agent, and the biopolymer chitosan as a capping agent. The chitosan-based silver nanoparticles were characterized by ultraviolet–visible, Fourier transform infrared, dynamic light scattering, zeta potential, atomic force microscopy, and transmission electron microscope. The antibacterial assay was performed by determination of the minimum inhibitory concentration. The antileishmanial and the cytotoxic effects induced by AgNO3, chitosan, and chitosan-based silver nanoparticles were analyzed by resazurin and MTT colorimetric assays, respectively. AgNO3, chitosan, and chitosan-based silver nanoparticles induced a marked activity against all bacterial strains and promastigote forms of Leishmania amazonensis at minimum inhibitory concentrations ranging from 1.69 to 3.38 µg Ag/mL. Interestingly, the chitosan-based silver nanoparticles presented less cytotoxicity than the AgNO3 alone and were more active against L. amazonensis than solely chitosan. Furthermore, the cytotoxic concentrations (CC50) of both chitosan and chitosan-based silver nanoparticles against macrophages were significantly higher than the IC50 against promastigotes. Thus, the chitosan-based silver nanoparticles represent a promising alternative for the treatment of microbial infections and leishmaniasis.
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Affiliation(s)
- Douglas dos Santos Lima
- Research Center for Biodiversity and Biotechnology (BIOTEC), Federal University of Piauí (UFPI), Parnaíba, Brazil
- Medicinal Plants Research Center (NPPM), Federal University of Piauí (UFPI), Teresina, Brazil
| | - Beatriz Gullon
- Center for Biotechnology and Fine Chemistry, Catholic University of Portugal, Porto, Portugal
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, Santiago de Compostela, Spain
| | | | - Lucas M Brito
- Research Center for Biodiversity and Biotechnology (BIOTEC), Federal University of Piauí (UFPI), Parnaíba, Brazil
- Medicinal Plants Research Center (NPPM), Federal University of Piauí (UFPI), Teresina, Brazil
| | - Klinger AF Rodrigues
- Medicinal Plants Research Center (NPPM), Federal University of Piauí (UFPI), Teresina, Brazil
| | - Patrick V Quelemes
- Research Center for Biodiversity and Biotechnology (BIOTEC), Federal University of Piauí (UFPI), Parnaíba, Brazil
| | - Joilson Ramos-Jesus
- Research Center for Biodiversity and Biotechnology (BIOTEC), Federal University of Piauí (UFPI), Parnaíba, Brazil
| | - Daniel DR Arcanjo
- Research Center for Biodiversity and Biotechnology (BIOTEC), Federal University of Piauí (UFPI), Parnaíba, Brazil
- Medicinal Plants Research Center (NPPM), Federal University of Piauí (UFPI), Teresina, Brazil
| | - Alexandra Plácido
- REQUIMTE/LAQV, Polytechnic Institute of Porto (ISEP), Porto, Portugal
| | - Krystallenia Batziou
- UCIBIO/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, Porto University, Porto, Portugal
| | - Pedro Quaresma
- UCIBIO/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, Porto University, Porto, Portugal
| | - Peter Eaton
- UCIBIO/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, Porto University, Porto, Portugal
| | | | | | - Durcilene Alves da Silva
- Research Center for Biodiversity and Biotechnology (BIOTEC), Federal University of Piauí (UFPI), Parnaíba, Brazil
| | - Manuela Pintado
- Center for Biotechnology and Fine Chemistry, Catholic University of Portugal, Porto, Portugal
| | - Jose Roberto de SA Leite
- Research Center for Biodiversity and Biotechnology (BIOTEC), Federal University of Piauí (UFPI), Parnaíba, Brazil
- UCIBIO/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, Porto University, Porto, Portugal
- Area of Morphology, Faculty of Medicine, University of Brasilia (UnB), Brasilia, Brazil
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Development of thiamine and pyridoxine loaded ferulic acid-grafted chitosan microspheres for dietary supplementation. Journal of Food Science and Technology 2015; 53:551-560. [PMID: 26787974 DOI: 10.1007/s13197-015-2044-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 09/12/2015] [Accepted: 09/16/2015] [Indexed: 10/23/2022]
Abstract
Therapeutic potential of water soluble vitamins has been known for long and in recent times they are being widely supplemented in processed food. Phenolic acid-grafted chitosan derivatives can serve as excellent biofunctional encapsulating materials for these vitamins. As a proof of concept, thiamine and pyridoxine loaded ferulic acid-grafted chitosan microspheres were developed. Ferulic acid was successfully grafted on chitosan by a free radical mediated reaction and the structure was confirmed by FTIR and NMR analysis. When compared to FTIR spectra of chitosan, intensity of amide I (at around 1644 cm(-1)) and amide II (at around 1549 cm(-1)) bands in spectra of ferulic acid-grafted chitosan were found increased, indicating formation of new amide linkage. Strong signals at δ = 6.3-7.9 ppm corresponding to methine protons of ferulic acid were observed in NMR spectra of ferulic acid-grafted chitosan, suggesting the successful grafting of ferulic acid onto chitosan. Grafting ratio of the derivative was 263 mg ferulic acid equivalent/g polymer. Positively charged particles (zeta potential 31 mv) of mean diameter 4.5 and 4.8 μ, corresponding to number distribution and area distribution respectively were observed. Compact microspheres with smooth surfaces and no apparent cracks or pores were observed under scanning electron microscope. Efficient microencapsulation was further proved by X-ray diffraction patterns and thermal analysis. Preliminary anti-inflammatory activity of the vitamin-loaded microspheres was demonstrated.
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Jain SK, Kumar A, Kumar A, Pandey AN, Rajpoot K. Development and in vitro characterization of a multiparticulate delivery system for acyclovir-resinate complex. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015; 44:1266-75. [DOI: 10.3109/21691401.2015.1024841] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Sunil K. Jain
- Department of Pharmaceutics, SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, Chhattisgarh, India
| | - Ajay Kumar
- Department of Pharmaceutics, SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, Chhattisgarh, India
| | - Amrish Kumar
- Department of Pharmaceutics, SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, Chhattisgarh, India
| | - Aditya N. Pandey
- Department of Pharmaceutics, SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, Chhattisgarh, India
| | - Kuldeep Rajpoot
- Department of Pharmaceutics, SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, Chhattisgarh, India
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Huo W, Zhang W, Wang W, Zhou X. Physicochemical properties and drug release behavior of biguanidino and O-carboxymethyl chitosan microcapsules. Int J Biol Macromol 2014; 70:257-65. [DOI: 10.1016/j.ijbiomac.2014.06.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 06/07/2014] [Accepted: 06/14/2014] [Indexed: 11/27/2022]
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Carrier systems for yerba mate extract (Ilex paraguariensis) to enrich instant soups. Release mechanisms under different pH conditions. Lebensm Wiss Technol 2013. [DOI: 10.1016/j.lwt.2013.01.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Zhao W, Yang RJ, Qian TT, Hua X, Zhang WB, Katiyo W. Preparation of novel poly(hydroxyethyl methacrylate-co-glycidyl methacrylate)-grafted core-shell magnetic chitosan microspheres and immobilization of lactase. Int J Mol Sci 2013; 14:12073-89. [PMID: 23743822 PMCID: PMC3709774 DOI: 10.3390/ijms140612073] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 05/19/2013] [Accepted: 05/31/2013] [Indexed: 11/16/2022] Open
Abstract
Poly(hydroxyethyl methacrylate-co-glycidyl methacrylate)-grafted magnetic chitosan microspheres (HG-MCM) were prepared using reversed-phase suspension polymerization method. The HG-MCM presented a core-shell structure and regular spherical shape with poly(hydroxyethyl methacrylate-co-glycidyl methacrylate) grafted onto the chitosan layer coating the Fe3O4 cores. The average diameter of the magnetic microspheres was 10.67 μm, within a narrow size distribution of 6.6–17.4 μm. The saturation magnetization and retentivity of the magnetic microspheres were 7.0033 emu/g and 0.6273 emu/g, respectively. The application of HG-MCM in immobilization of lactase showed that the immobilized enzyme presented higher storage, pH and thermal stability compared to the free enzyme. This indicates that HG-MCM have potential applications in bio-macromolecule immobilization.
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Affiliation(s)
- Wei Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi 214122, China; E-Mails: (W.Z.); (X.H.); (W.-B.Z.); (W.K.)
| | - Rui-Jin Yang
- School of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi 214122, China; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel./Fax: +86-510-8591-9150
| | - Ting-Ting Qian
- School of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi 214122, China; E-Mail:
| | - Xiao Hua
- State Key Laboratory of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi 214122, China; E-Mails: (W.Z.); (X.H.); (W.-B.Z.); (W.K.)
| | - Wen-Bin Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi 214122, China; E-Mails: (W.Z.); (X.H.); (W.-B.Z.); (W.K.)
| | - Wendy Katiyo
- State Key Laboratory of Food Science and Technology, Jiangnan University, No. 1800 Lihu Road, Wuxi 214122, China; E-Mails: (W.Z.); (X.H.); (W.-B.Z.); (W.K.)
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PREPARATION OF GRAFTED MICROSPHERES CPVA- g-PSSS AND STUDIES ON THEIR CHARACTER OF DRUG CARRYING AND COLON-SPECIFIC DRUG DELIVERY FOR 5-FLUOROURACIL. ACTA POLYM SIN 2012. [DOI: 10.3724/sp.j.1105.2012.12003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Li W, Wu J, Zhan P, Chang Y, Pannecouque C, De Clercq E, Liu X. Synthesis, drug release and anti-HIV activity of a series of PEGylated zidovudine conjugates. Int J Biol Macromol 2012; 50:974-80. [DOI: 10.1016/j.ijbiomac.2012.02.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 02/08/2012] [Accepted: 02/18/2012] [Indexed: 10/28/2022]
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Seyfoddin A, Al-Kassas R. Development of solid lipid nanoparticles and nanostructured lipid carriers for improving ocular delivery of acyclovir. Drug Dev Ind Pharm 2012; 39:508-19. [PMID: 22424312 DOI: 10.3109/03639045.2012.665460] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The objective of the present investigation was to improve the ocular bioavailability of acyclovir by incorporating it into solid lipid nanoparticles (SLNs) and nanostructured lipid carriers (NLCs). This required optimization of the process parameters, such as type of lipid, drug to lipid ratios, type and concentration of surfactants, and type and amount of liquid lipids used in the formulations. SLNs and NLCs were prepared by the modified hot oil in water microemuslion method. The prepared nanoparticles were evaluated for their particle size, zeta potential, entrapment efficiency, solid state characteristics, surface morphology, in vitro drug release, and permeation through excised cornea. The prepared nanoparticles were spherical and within the size range suitable for ocular drug delivery (400-777.56 nm). Incorporation of liquid oil in the structure of SLNs resulted in the formation of NLCs with high entrapment efficiency (25-91.64%) compared to SLNs (11.14%). The drug release from SLNs and NLCs was rather a surface-based phenomenon. In comparison to free drug solution, NLCs were capable of having faster permeation through the excised cornea indicating their potential enhanced corneal penetration properties. However, SLNs have reduced the permeation rate significantly. The results of the study suggest that SLNs can be successfully converted to physically superior NLCs, which have the potential to be developed further as ocular drug delivery systems for ACV.
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Affiliation(s)
- Ali Seyfoddin
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
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Tataru G, Popa M, Costin D, Desbrieres J. Microparticles based on natural and synthetic polymers for ophthalmic applications. J Biomed Mater Res A 2012; 100:1209-20. [PMID: 22344747 DOI: 10.1002/jbm.a.34069] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Revised: 11/03/2011] [Accepted: 11/17/2011] [Indexed: 11/09/2022]
Abstract
Sodium salt of carboxymethylcellulose/poly(vinyl alcohol) particles suitable for application in ocular drug administration were prepared by crosslinking with epichlorohydrin in an alkaline medium, in reverse emulsion. The influence of parameters related with the particles elaboration process (ratio between polymer mixture and crosslinking agent, concentration of polymer solution, duration of crosslinking reaction, stirring intensity, etc.) based on their composition, size, and swelling ability was studied. Obtained microparticles fulfill the requirements for biomaterials-they are formed from biocompatible polymers; the acute toxicity value (LD(50)) is high enough to consider these materials as weakly toxic (hence able to introduce within the organism); they are able to include and release drugs in a controlled way. The in vivo adrenalin ocular delivery from the microparticles was tested on voluntary human patient. The particles showed good adhesion properties without irritation to the patient and proved the capability to treat the ocular congestion.
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Affiliation(s)
- G Tataru
- Faculty of Chemical Engineering and Protection of the Environment, Department of Natural and Synthetic Polymers, Technical University Gheorghe Asachi of Iasi, Iasi, Romania
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Tavakoli N, Varshosaz J, Dorkoosh F, Motaghi S, Tamaddon L. Development and Evaluation of a Monolithic Floating Drug Delivery System for Acyclovir. Chem Pharm Bull (Tokyo) 2012; 60:172-7. [DOI: 10.1248/cpb.60.172] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Naser Tavakoli
- Department of Pharmaceutics, School of Pharmacy and Isfahan Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences
| | - Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy and Isfahan Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences
| | - Farid Dorkoosh
- Department of Pharmaceutics, School of Pharmacy, Tehran University of Medical Sciences
| | - Sedigheh Motaghi
- Department of Pharmaceutics, School of Pharmacy and Isfahan Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences
| | - Lana Tamaddon
- Department of Pharmaceutics, School of Pharmacy and Isfahan Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences
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Md. S, Ahuja A, Khar RK, Baboota S, Ali J, Chuttani K, Mishra AK. Acyclovir-Loaded Chitosan Microspheres for Gastroretention: Development and Evaluation. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691.2010.505819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Lembo D, Cavalli R. Nanoparticulate Delivery Systems for Antiviral Drugs. ACTA ACUST UNITED AC 2010; 21:53-70. [DOI: 10.3851/imp1684] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Nanomedicine opens new therapeutic avenues for attacking viral diseases and for improving treatment success rates. Nanoparticulate-based systems might change the release kinetics of antivirals, increase their bioavailability, improve their efficacy, restrict adverse drug side effects and reduce treatment costs. Moreover, they could permit the delivery of antiviral drugs to specific target sites and viral reservoirs in the body. These features are particularly relevant in viral diseases where high drug doses are needed, drugs are expensive and the success of a therapy is associated with a patient's adherence to the administration protocol. This review presents the current status in the emerging area of nanoparticulate delivery systems in antiviral therapy, providing their definition and description, and highlighting some peculiar features. The paper closes with a discussion on the future challenges that must be addressed before the potential of nanotechnology can be translated into safe and effective antiviral formulations for clinical use.
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Affiliation(s)
- David Lembo
- Dipartimento di Scienze Cliniche e Biologiche, Università degli Studi di Torino, Orbassano Torino, Italy
| | - Roberta Cavalli
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Torino, Italy
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Shadab, Ahuja A, Khar RK, Baboota S, Chuttani K, Mishra AK, Ali J. Gastroretentive drug delivery system of acyclovir-loaded alginate mucoadhesive microspheres: formulation and evaluation. Drug Deliv 2010; 18:255-64. [PMID: 21110695 DOI: 10.3109/10717544.2010.536270] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In the present study, mucoadhesive alginate microspheres of acyclovir were prepared to prolong the gastric residence time using a simple emulsification phase separation technique. The particle size of drug-loaded formulations was measured by SEM and the particle size distribution was determined using an optical microscope and mastersizer. The release profile of acyclovir from microspheres was examined in simulated gastric fluid (SGF pH 1.2). The particles were found to be discreet and spherical with the maximum particles of an average size (70.60 ± 2.44 µm). The results indicated that the mean particle size of the microspheres increased with an increase in the concentration of polymer and decreased with increase in stirring speed. The entrapment efficiency was found to be in the range of 51.42-80.46%. The concentration of the calcium chloride (% w/v) of 10% and drug-polymer ratio of 1:4 resulted in an increase in the entrapment efficiency and the extent of drug release. The optimized alginate microspheres were found to possess good mucoadhesion (66.42 ± 1.01%). The best fit model with the highest regression coefficient values (R²) was predicted by Peppas model (0.9813). In Gamma scintigraphy analysis, the section of GIT was critically analyzed and much differentiation was present at each time point after oral administration, which revealed that the optimized formulation demonstrated gastroretention in vivo for more than 4 h, which revealed that optimized formulation could be a good choice for gastroretentive systems.
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Affiliation(s)
- Shadab
- Department of Pharmaceutics, Faculty of Pharmacy, Jamia Hamdard, Hamdard Nagar, New Delhi-110062, India
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Vicentini DS, Smania A, Laranjeira MC. Chitosan/poly (vinyl alcohol) films containing ZnO nanoparticles and plasticizers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2009.01.026] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gao X, Zhang X, Zhang X, Cheng C, Wang Z, Li C. Encapsulation of BSA in polylactic acid–hyperbranched polyglycerol conjugate nanoparticles: preparation, characterization, and release kinetics. Polym Bull (Berl) 2010. [DOI: 10.1007/s00289-010-0273-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Differential scanning calorimetry as a screening technique in compatibility studies of acyclovir extended release formulations. Pharm Chem J 2009. [DOI: 10.1007/s11094-009-0304-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Development of mucoadhesive microspheres of acyclovir with enhanced bioavailability. Int J Pharm 2009; 378:30-6. [PMID: 19465102 DOI: 10.1016/j.ijpharm.2009.05.025] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Revised: 04/30/2009] [Accepted: 05/18/2009] [Indexed: 11/22/2022]
Abstract
Acyclovir-loaded mucoadhesive microspheres (ACV-ad-ms) using Ethylcellulose as matrix and Carbopol 974P NF as mucoadhesive polymer were prepared for the purpose of improving the oral bioavailability of acyclovir. The morphological properties of the microspheres were studied by optical microscopy and scanning electron microscopy (SEM). Drug loading and encapsulation efficiency was determined using HPLC method. In vitro and in vivo mucoadhesion of the microspheres was evaluated. Eggshell membrane was found to have a potential use for in vitro mucoadhesion measurement in place of stomach mucosa. In vitro drug release profiles and oral bioavailability of acyclovir in rats were also investigated. The release of the drug was influenced markedly by the medium pH and the proportion of Carbopol incorporated in the microspheres. The result of mucoadhesion study showed prolonged residence time of ACV-ad-ms in rats' gastrointestinal tract. In pharmacokinetics study, relatively steady plasma drug concentrations were observed within 8 h after oral administration of ACV-ad-ms to rats. The AUC(0-t) and mean residence time (MRT) of ACV-ad-ms (6055.9 ng h/mL and 7.2 h) were significantly higher than that of ACV suspension (2335.6 ng h/mL and 3.7 h) (P<0.05), which indicated that the bioavailability of acyclovir was greatly improved due to the prolonged retention of ACV-ad-ms in gastrointestinal tract.
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de Fávere VT, Hinze WL. Evaluation of the potential of chitosan hydrogels to extract polar organic species from nonpolar organic solvents: Application to the extraction of aminopyridines from hexane. J Colloid Interface Sci 2009; 330:38-44. [DOI: 10.1016/j.jcis.2008.10.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Revised: 10/12/2008] [Accepted: 10/16/2008] [Indexed: 10/21/2022]
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