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Lukova P, Katsarov P. Contemporary Aspects of Designing Marine Polysaccharide Microparticles as Drug Carriers for Biomedical Application. Pharmaceutics 2023; 15:2126. [PMID: 37631340 PMCID: PMC10458623 DOI: 10.3390/pharmaceutics15082126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 08/05/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
The main goal of modern pharmaceutical technology is to create new drug formulations that are safer and more effective. These formulations should allow targeted drug delivery, improved drug stability and bioavailability, fewer side effects, and reduced drug toxicity. One successful approach for achieving these objectives is using polymer microcarriers for drug delivery. They are effective for treating various diseases through different administration routes. When creating pharmaceutical systems, choosing the right drug carrier is crucial. Biomaterials have become increasingly popular over the past few decades due to their lack of toxicity, renewable sources, and affordability. Marine polysaccharides, in particular, have been widely used as substitutes for synthetic polymers in drug carrier applications. Their inherent properties, such as biodegradability and biocompatibility, make marine polysaccharide-based microcarriers a prospective platform for developing drug delivery systems. This review paper explores the principles of microparticle design using marine polysaccharides as drug carriers. By reviewing the current literature, the paper highlights the challenges of formulating polymer microparticles, and proposes various technological solutions. It also outlines future perspectives for developing marine polysaccharides as drug microcarriers.
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Affiliation(s)
- Paolina Lukova
- Department of Pharmacognosy and Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria;
| | - Plamen Katsarov
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria
- Research Institute at Medical University of Plovdiv, 4002 Plovdiv, Bulgaria
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2
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Zahariev N, Katsarov P, Lukova P, Pilicheva B. Novel Fucoidan Pharmaceutical Formulations and Their Potential Application in Oncology-A Review. Polymers (Basel) 2023; 15:3242. [PMID: 37571136 PMCID: PMC10421178 DOI: 10.3390/polym15153242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/23/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
Fucoidan belongs to the family of marine sulfated, L-fucose-rich polysaccharides found in the cell wall matrix of various brown algae species. In the last few years, sulfated polysaccharides have attracted the attention of researchers due to their broad biological activities such as anticoagulant, antithrombotic, antidiabetic, immunomodulatory, anticancer and antiproliferative effects. Recently the application of fucoidan in the field of pharmaceutical technology has been widely investigated. Due to its low toxicity, biocompatibility and biodegradability, fucoidan plays an important role as a drug carrier for the formulation of various drug delivery systems, especially as a biopolymer with anticancer activity, used for targeted delivery of chemotherapeutics in oncology. Furthermore, the presence of sulfate residues with negative charge in its structure enables fucoidan to form ionic complexes with oppositely charged molecules, providing relatively easy structure-forming properties in combination with other polymers. The aim of the present study was to overview essential fucoidan characteristics, related to its application in the development of pharmaceutical formulations as a single drug carrier or in combinations with other polymers. Special focus was placed on micro- and nanosized drug delivery systems with polysaccharides and their application in the field of oncology.
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Affiliation(s)
- Nikolay Zahariev
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 15A Vassil Aprilov Blvd, 4002 Plovdiv, Bulgaria; (N.Z.); (B.P.)
- Research Institute, Medical University of Plovdiv, 15A Vassil Aprilov Blvd, 4002 Plovdiv, Bulgaria
| | - Plamen Katsarov
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 15A Vassil Aprilov Blvd, 4002 Plovdiv, Bulgaria; (N.Z.); (B.P.)
- Research Institute, Medical University of Plovdiv, 15A Vassil Aprilov Blvd, 4002 Plovdiv, Bulgaria
| | - Paolina Lukova
- Department of Pharmacognosy and Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University of Plovdiv, 15A Vassil Aprilov Blvd, 4002 Plovdiv, Bulgaria;
| | - Bissera Pilicheva
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 15A Vassil Aprilov Blvd, 4002 Plovdiv, Bulgaria; (N.Z.); (B.P.)
- Research Institute, Medical University of Plovdiv, 15A Vassil Aprilov Blvd, 4002 Plovdiv, Bulgaria
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3
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Haggag YA, Abd Elrahman AA, Ulber R, Zayed A. Fucoidan in Pharmaceutical Formulations: A Comprehensive Review for Smart Drug Delivery Systems. Mar Drugs 2023; 21:md21020112. [PMID: 36827153 PMCID: PMC9965894 DOI: 10.3390/md21020112] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 02/09/2023] Open
Abstract
Fucoidan is a heterogeneous group of polysaccharides isolated from marine organisms, including brown algae and marine invertebrates. The physicochemical characteristics and potential bioactivities of fucoidan have attracted substantial interest in pharmaceutical industries in the past few decades. These polysaccharides are characterized by possessing sulfate ester groups that impart negatively charged surfaces, low/high molecular weight, and water solubility. In addition, various promising bioactivities have been reported, such as antitumor, immunomodulatory, and antiviral effects. Hence, the formulation of fucoidan has been investigated in the past few years in diverse pharmaceutical dosage forms to be able to reach their site of action effectively. Moreover, they can act as carriers for various drugs in value-added drug delivery systems. The current work highlights the attractive biopharmaceutical properties of fucoidan being formulated in oral, inhalable, topical, injectable, and other advanced formulations treating life-quality-affecting diseases. Therefore, the present work points out the current status of fucoidan pharmaceutical formulations for future research transferring their application from in vitro and in vivo studies to clinical application and market availability.
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Affiliation(s)
- Yusuf A. Haggag
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Tanta University, El-Geish Street, Tanta 31527, Egypt
- Department of Pharmaceutical Sciences and the Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Abeer A. Abd Elrahman
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Tanta University, El-Geish Street, Tanta 31527, Egypt
| | - Roland Ulber
- Institute of Bioprocess Engineering, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Gottlieb-Daimler-Street 49, 67663 Kaiserslautern, Germany
| | - Ahmed Zayed
- Institute of Bioprocess Engineering, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Gottlieb-Daimler-Street 49, 67663 Kaiserslautern, Germany
- Department of Pharmacognosy, Faculty of Pharmacy, Tanta University, El-Guish Street, Tanta 31527, Egypt
- Correspondence:
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Iqbal MW, Riaz T, Mahmood S, Bilal M, Manzoor MF, Qamar SA, Qi X. Fucoidan-based nanomaterial and its multifunctional role for pharmaceutical and biomedical applications. Crit Rev Food Sci Nutr 2022; 64:354-380. [PMID: 35930305 DOI: 10.1080/10408398.2022.2106182] [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: 11/03/2022]
Abstract
Fucoidans are promising sulfated polysaccharides isolated from marine sources that have piqued the interest of scientists in recent years due to their widespread use as a bioactive substance. Bioactive coatings and films, unsurprisingly, have seized these substances to create novel, culinary, therapeutic, and diagnostic bioactive nanomaterials. The applications of fucoidan and its composite nanomaterials have a wide variety of food as well as pharmacological properties, including anti-oxidative, anti-inflammatory, anti-cancer, anti-thrombic, anti-coagulant, immunoregulatory, and anti-viral properties. Blends of fucoidan with other biopolymers such as chitosan, alginate, curdlan, starch, etc., have shown promising coating and film-forming capabilities. A blending of biopolymers is a recommended approach to improve their anticipated properties. This review focuses on the fundamental knowledge and current development of fucoidan, fucoidan-based composite material for bioactive coatings and films, and their biological properties. In this article, fucoidan-based edible bioactive coatings and films expressed excellent mechanical strength that can prolong the shelf-life of food products and maintain their biodegradability. Additionally, these coatings and films showed numerous applications in the biomedical field and contribute to the economy. We hope this review can deliver the theoretical basis for the development of fucoidan-based bioactive material and films.
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Affiliation(s)
| | - Tahreem Riaz
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Shahid Mahmood
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | | | - Sarmad Ahmad Qamar
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan
| | - Xianghui Qi
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
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5
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Seaweed Phenolics as Natural Antioxidants, Aquafeed Additives, Veterinary Treatments and Cross-Linkers for Microencapsulation. Mar Drugs 2022; 20:md20070445. [PMID: 35877738 PMCID: PMC9319038 DOI: 10.3390/md20070445] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 12/10/2022] Open
Abstract
Driven by consumer demand and government policies, synthetic additives in aquafeed require substitution with sustainable and natural alternatives. Seaweeds have been shown to be a sustainable marine source of novel bioactive phenolic compounds that can be used in food, animal and aqua feeds, or microencapsulation applications. For example, phlorotannins are a structurally unique polymeric phenolic group exclusively found in brown seaweed that act through multiple antioxidant mechanisms. Seaweed phenolics show high affinities for binding proteins via covalent and non-covalent bonds and can have specific bioactivities due to their structures and associated physicochemical properties. Their ability to act as protein cross-linkers means they can be used to enhance the rheological and mechanical properties of food-grade delivery systems, such as microencapsulation, which is a new area of investigation illustrating the versatility of seaweed phenolics. Here we review how seaweed phenolics can be used in a range of applications, with reference to their bioactivity and structural properties.
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Nunes C, Coimbra MA. The Potential of Fucose-Containing Sulfated Polysaccharides As Scaffolds for Biomedical Applications. Curr Med Chem 2019; 26:6399-6411. [PMID: 30543164 DOI: 10.2174/0929867326666181213093718] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 11/15/2018] [Accepted: 11/17/2018] [Indexed: 12/13/2022]
Abstract
Marine environments have a high quantity and diversity of sulfated polysaccharides. In coastal regions brown algae are the most abundant biomass producers and their cell walls have fucosecontaining sulfated polysaccharides (FCSP), known as fucans and/or fucoidans. These sulfated compounds have been widely researched for their biomedical properties, namely the immunomodulatory, haemostasis, pathogen inhibition, anti-inflammatory capacity, and antitumoral. These activities are probably due to their ability to mimic the carbohydrate moieties of mammalian glycosaminoglycans. Therefore, the FCSP are interesting compounds for application in health-related subjects, mainly for developing scaffolds for delivery systems or tissue regeneration. FCSP showed potential for these applications also due to their ability to form stable 3D structures with other polymers able to entrap therapeutic agents or cell and growth factors, besides their biocompatibility and biodegradability. However, for the clinical use of these biopolymers well-defined reproducible molecules are required in order to accurately establish relationships between structural features and human health applications.
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Affiliation(s)
- Cláudia Nunes
- CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.,QOPNA/LAQVREQUIMTE, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Manuel A Coimbra
- QOPNA/LAQVREQUIMTE, University of Aveiro, 3810-193 Aveiro, Portugal
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7
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Suprunchuk VE. Low-molecular-weight fucoidan: Chemical modification, synthesis of its oligomeric fragments and mimetics. Carbohydr Res 2019; 485:107806. [DOI: 10.1016/j.carres.2019.107806] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/05/2019] [Accepted: 09/05/2019] [Indexed: 01/18/2023]
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8
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Citkowska A, Szekalska M, Winnicka K. Possibilities of Fucoidan Utilization in the Development of Pharmaceutical Dosage Forms. Mar Drugs 2019; 17:E458. [PMID: 31387230 PMCID: PMC6722496 DOI: 10.3390/md17080458] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 07/27/2019] [Accepted: 08/02/2019] [Indexed: 12/11/2022] Open
Abstract
Fucoidan is a polysaccharide built from L-fucose molecules. The main source of this polysaccharide is the extracellular matrix of brown seaweed (Phaeophyta), but it can be also isolated from invertebrates such as sea urchins (Echinoidea) and sea cucumbers (Holothuroidea). Interest in fucoidan is related to its broad biological activity, including possible antioxidant, anti-inflammatory, antifungal, antiviral or antithrombotic effects. The potential application of fucoidan in the pharmaceutical technology is also due to its ionic nature. The negative charge of the molecule results from the presence of sulfate residues in the C-2 and C-4 positions, occasionally in C-3, allowing the formation of complexes with other oppositely charged molecules. Fucoidan is non-toxic, biodegradable and biocompatible compound approved by Food and Drug Administration (FDA) as Generally Recognized As Safe (GRAS) category as food ingredient. Fucoidan plays an important role in the pharmaceutical technology, so in this work aspects concerning its pharmaceutical characteristics and designing of various dosage forms (nanoparticles, liposomes, microparticles, and semisolid formulations) with fucoidan itself and with its combinations with other polymers or components that give a positive charge were reviewed. Advantages and limitations of fucoidan utilization in the pharmaceutical technology were also discussed.
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Affiliation(s)
- Aleksandra Citkowska
- Department of Pharmaceutical Technology, Medical University of Białystok, Mickiewicza 2c, 15-222 Białystok, Poland
| | - Marta Szekalska
- Department of Pharmaceutical Technology, Medical University of Białystok, Mickiewicza 2c, 15-222 Białystok, Poland
| | - Katarzyna Winnicka
- Department of Pharmaceutical Technology, Medical University of Białystok, Mickiewicza 2c, 15-222 Białystok, Poland.
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9
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Mulas K, Stefanowicz Z, Oledzka E, Sobczak M. Current state of the polymeric delivery systems of fluoroquinolones – A review. J Control Release 2019; 294:195-215. [DOI: 10.1016/j.jconrel.2018.12.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/11/2018] [Accepted: 12/12/2018] [Indexed: 01/29/2023]
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10
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Cunha L, Rosa da Costa AM, Lourenço JP, Buttini F, Grenha A. Spray-dried fucoidan microparticles for pulmonary delivery of antitubercular drugs. J Microencapsul 2018; 35:392-405. [PMID: 30112917 DOI: 10.1080/02652048.2018.1513089] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Pulmonary tuberculosis accounts for 80% of cases and the delivery of antitubercular drugs into the lungs allows targeting the infected organ and, possibly, reducing systemic drug toxicity. This work aimed at using fucoidan as matrix of inhalable microparticles that associate two first-line antitubercular drugs, for an application in pulmonary tuberculosis therapy. Fucoidan is composed of fucose and sulphated sugar residues, moieties described as being recognised by surface receptors of alveolar macrophages, which host mycobacteria. Inhalable fucoidan microparticles loaded with antitubercular drugs were successfully produced with high association efficiencies of either isoniazid (95%) or rifabutin (81%). The microparticles evidenced no cytotoxicity on lung epithelial cells (A549). However, rifabutin-loaded microparticles showed a certain degree of toxicity on macrophage-like cells (THP-1) at the highest tested concentration (1 mg/mL). Furthermore, microparticles showed favourable aerodynamic properties for deep lung delivery (MMAD 2.0-3.8 µm) and, thus, show potential for an application as inhalable tuberculosis therapy.
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Affiliation(s)
- Ludmylla Cunha
- a Centre for Biomedical Research , University of Algarve , Faro , Portugal.,b Centre for Marine Sciences, Faculty of Sciences and Technology , University of Algarve , Faro , Portugal
| | - Ana M Rosa da Costa
- c Chemistry Research Centre and Department of Chemistry and Pharmacy , University of Algarve , Faro , Portugal
| | - João P Lourenço
- c Chemistry Research Centre and Department of Chemistry and Pharmacy , University of Algarve , Faro , Portugal.,d Centro de Química Estrutural (CQE), Instituto Superior Técnico , University of Lisbon , Lisbon , Portugal
| | | | - Ana Grenha
- a Centre for Biomedical Research , University of Algarve , Faro , Portugal.,b Centre for Marine Sciences, Faculty of Sciences and Technology , University of Algarve , Faro , Portugal
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11
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Cunha L, Grenha A. Sulfated Seaweed Polysaccharides as Multifunctional Materials in Drug Delivery Applications. Mar Drugs 2016; 14:E42. [PMID: 26927134 PMCID: PMC4820297 DOI: 10.3390/md14030042] [Citation(s) in RCA: 273] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 02/10/2016] [Accepted: 02/15/2016] [Indexed: 02/07/2023] Open
Abstract
In the last decades, the discovery of metabolites from marine resources showing biological activity has increased significantly. Among marine resources, seaweed is a valuable source of structurally diverse bioactive compounds. The cell walls of marine algae are rich in sulfated polysaccharides, including carrageenan in red algae, ulvan in green algae and fucoidan in brown algae. Sulfated polysaccharides have been increasingly studied over the years in the pharmaceutical field, given their potential usefulness in applications such as the design of drug delivery systems. The purpose of this review is to discuss potential applications of these polymers in drug delivery systems, with a focus on carrageenan, ulvan and fucoidan. General information regarding structure, extraction process and physicochemical properties is presented, along with a brief reference to reported biological activities. For each material, specific applications under the scope of drug delivery are described, addressing in privileged manner particulate carriers, as well as hydrogels and beads. A final section approaches the application of sulfated polysaccharides in targeted drug delivery, focusing with particular interest the capacity for macrophage targeting.
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Affiliation(s)
- Ludmylla Cunha
- Centre for Marine Sciences, University of Algarve, 8005-139 Faro, Portugal.
- Drug Delivery Laboratory, Centre for Biomedical Research (CBMR), Faculty of Sciences and Technology, University of Algarve, Gambelas Campus, 8005-139 Faro, Portugal.
| | - Ana Grenha
- Centre for Marine Sciences, University of Algarve, 8005-139 Faro, Portugal.
- Drug Delivery Laboratory, Centre for Biomedical Research (CBMR), Faculty of Sciences and Technology, University of Algarve, Gambelas Campus, 8005-139 Faro, Portugal.
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12
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Ferreira da Silva C, Severino P, Martins F, Santana MHA, Souto EB. Didanosine-loaded chitosan microspheres optimized by surface-response methodology: a modified "Maximum Likelihood Classification" approach formulation for reverse transcriptase inhibitors. Biomed Pharmacother 2015; 70:46-52. [PMID: 25776478 DOI: 10.1016/j.biopha.2014.12.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 12/30/2014] [Indexed: 12/13/2022] Open
Abstract
Didanosine-loaded chitosan microspheres were developed applying a surface-response methodology and using a modified Maximum Likelihood Classification. The operational conditions were optimized with the aim of maintaining the active form of didanosine (ddI), which is sensitive to acid pH, and to develop a modified and mucoadhesive formulation. The loading of the drug within the chitosan microspheres was carried out by ionotropic gelation technique with sodium tripolyphosphate (TPP) as cross-linking agent and magnesium hydroxide (Mg(OH)₂) to assure the stability of ddI. The optimization conditions were set using a surface-response methodology and applying the "Maximum Likelihood Classification", where the initial chitosan concentration, TPP and ddI concentration were set as the independent variables. The maximum ddI-loaded in microspheres (i.e. 1433 mg of ddI/g chitosan), was obtained with 2% (w/v) chitosan and 10% TPP. The microspheres depicted an average diameter of 11.42 μm and ddI was gradually released during 2 h in simulated enteric fluid.
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Affiliation(s)
- Classius Ferreira da Silva
- Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Rua Arthur Riedel, 275, Diadema 09972-270, Brazil
| | - Patrícia Severino
- Department of Biotechnological Processes, School of Engineering Chemical, University of Campinas, Campinas 13083-970, Brazil; University of Tiradentes and Institute of Technology and Research, Av. Murilo Dantas 300, 49010-390 Aracaju, Brazil
| | - Fernanda Martins
- Department of Biotechnological Processes, School of Engineering Chemical, University of Campinas, Campinas 13083-970, Brazil
| | - Maria Helena A Santana
- Department of Biotechnological Processes, School of Engineering Chemical, University of Campinas, Campinas 13083-970, Brazil.
| | - Eliana B Souto
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra (FFUC), Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; Center for Neuroscience and Cell Biology & Institute for Biomedical Imaging and Life Sciences (CNC-IBILI), University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
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13
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Preparing, characterizing, and evaluating chitosan/fucoidan nanoparticles as oral delivery carriers. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0415-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Corrêa GG, Morais EC, Brambilla R, Bernardes AA, Radtke C, Dezen D, Júnior AV, Fronza N, Santos JHZD. Effects of the sol-gel route on the structural characteristics and antibacterial activity of silica-encapsulated gentamicin. Colloids Surf B Biointerfaces 2014; 116:510-7. [PMID: 24572495 DOI: 10.1016/j.colsurfb.2014.01.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 12/23/2013] [Accepted: 01/21/2014] [Indexed: 10/25/2022]
Abstract
The effects of sol-gel processes, i.e., acid-catalyzed gelation, base-catalyzed gelation and base-catalyzed precipitation routes, on the encapsulation of gentamicin were investigated. The resulting xerogels were characterized using a series of complementary instrumental techniques, i.e., the adsorption/desorption of nitrogen, small-angle X-ray scattering, Fourier transform infrared spectroscopy, diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy and scanning electron microscopy. The encapsulated gentamicin samples were tested against a series of Gram-positive and Gram-negative bacterial strains. The best antimicrobial activity was observed with the encapsulated gentamicin that was prepared via the precipitation route, even in comparison with the neat antibiotic, especially in the case of the Gram-positive strain Staphylococcus aureus. The gentamicin concentration on the outermost surface and the zeta potential were identified as factors that affected the highest efficiency, as observed in the case of encapsulation via the base-catalyzed process.
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Affiliation(s)
- G G Corrêa
- Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves, 9500, Porto Alegre 91501-970, RS, Brazil
| | - E C Morais
- Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves, 9500, Porto Alegre 91501-970, RS, Brazil
| | - R Brambilla
- Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves, 9500, Porto Alegre 91501-970, RS, Brazil
| | - A A Bernardes
- Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves, 9500, Porto Alegre 91501-970, RS, Brazil
| | - C Radtke
- Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves, 9500, Porto Alegre 91501-970, RS, Brazil
| | - D Dezen
- Instituto Federal de Educação, Ciência e Tecnologia Catarinense, Campus Concórdia, SC, Brazil
| | - A V Júnior
- Instituto Federal de Educação, Ciência e Tecnologia Catarinense, Campus Concórdia, SC, Brazil
| | - N Fronza
- Instituto Federal de Educação, Ciência e Tecnologia Catarinense, Campus Concórdia, SC, Brazil
| | - J H Z Dos Santos
- Universidade Federal do Rio Grande do Sul, Instituto de Química, Av. Bento Gonçalves, 9500, Porto Alegre 91501-970, RS, Brazil.
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