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Zhang Z, Liu J, Li M, Yang B, Liu W, Chu Z, Cui B, Chen X. Lactobacillus rhamnosus Encapsulated in Alginate/Chitosan Microgels Manipulates the Gut Microbiome to Ameliorate Salt-Induced Hepatorenal Injury. Front Nutr 2022; 9:872808. [PMID: 35495927 PMCID: PMC9047548 DOI: 10.3389/fnut.2022.872808] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/23/2022] [Indexed: 12/14/2022] Open
Abstract
As the essential regulator of intestinal bacterial diversity, probiotics are a potential treatment for chronic high-salt diet (HSD)–induced metabolic dysfunction. Probiotic cells entrapped in microgels have been confirmed as being more effective than free cells in protecting bacteria against unfavorable conditions, that is, enhancing their stress resistance. This study explored the physiological mechanism by which probiotic microgels relieve HSD–induced hepatorenal injury. Herein, Lactobacillus rhamnosus was encapsulated in alginate-chitosan microgels which the percentage of alginate/chitosan was applied 1.5:0.5 (w/w) in this system, and the encapsulation significantly improved the probiotic viability in simulated gastrointestinal conditions. Mice were fed an HSD with L. rhamnosus (SDL) or L. rhamnosus microgels (SDEL). After 8 weeks of administration, dietary sodium was confirmed as inducing the hepatic and renal damages in mice, based on indicators, including serum biomarker levels, histopathological features of tissues, and pro-inflammatory cytokine contents in blood levels. However, the serum levels of urea nitrogen, creatinine, uric acid, glutamic-pyruvic transaminase, glutamic-oxalacetic transaminase, and alkaline phosphatase in the SDL and SDEL-fed mice were significantly lowered compared to the HSD-fed mice, especially in the SDEL group. HSD increased the abundances of Anaeroplasma, Enterorhabdus, Parvibacter, and Bacteroides, while the microgels increased the abundances of Lactobacillus, Bifidobacterium, Mucispirillum, and Faecalibaculum. Significant variations of fecal metabolome were validated for SDEL-treated mice, containing those linked to entero-hepatic circulation (e.g., cholic acid), carbohydrate metabolism (i.e., L-lactic acid), and increased antioxidants including citric acid. Furthermore, the probiotic microgels ameliorated intestinal damage by improving barrier and absorption functions. These results augmented existing knowledge on probiotic application for salt toxicity.
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Affiliation(s)
- Zheng Zhang
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
- *Correspondence: Zheng Zhang
| | - Jiajian Liu
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Mengjie Li
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Binbin Yang
- College of Health Sciences, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Wei Liu
- Yucheng People's Hospital, Dezhou, China
| | - Zhuangzhuang Chu
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Bo Cui
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
- Bo Cui
| | - Xiao Chen
- College of Health Sciences, Shandong University of Traditional Chinese Medicine, Jinan, China
- Xiao Chen
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Lu S, Kong S, Wang Y, Hu Z, Zhang L, Liao M. Gastric acid-response chitosan/alginate/tilapia collagen peptide composite hydrogel: Protection effects on alcohol-induced gastric mucosal injury. Carbohydr Polym 2022; 277:118816. [PMID: 34893233 DOI: 10.1016/j.carbpol.2021.118816] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 08/28/2021] [Accepted: 10/25/2021] [Indexed: 12/14/2022]
Abstract
Long-term excessive alcohol intake can easily lead to gastritis, gastric ulcer, and gastric bleeding. In this paper, the gastric acid-responsive hydrogel of CS-NAC/alginate/tilapia collagen peptide (CS-NAC/ALG/TCP) was developed. Its structure and properties were determined. The alcohol-induced gastric mucosal injury models in mice were established to evaluate the protective effects of CS-NAC/ALG/TCP. The results showed that CS-NAC/ALG/TCP was successfully fabricated, and it showed a sustained release of TCP, strong mucoadhesion, and excellent biodegradability in vitro. In the animal experiments, CS-NAC/ALG/TCP improved the oxidative stress status of the gastric mucosa by increasing the levels of SOD, GSH, and CAT in tissues. It also down-regulated the expression of MPO, TNF-α, IL-1β, and IL-6, and increased the production of gastric protective factors such as PGE2 and NO in mouse stomach, thereby reducing the alcohol-induced inflammation and protecting the gastric mucosal injury. Besides, CS-NAC/ALG/TCP can also increase the activities of alcohol metabolism enzymes to improve alcohol metabolism, thereby reducing alcoholic damage. In conclusion, CS-NAC/ALG/TCP is a promising candidate for the treatment of alcohol-induced gastric injury.
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Affiliation(s)
- Sitong Lu
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China
| | - Songzhi Kong
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China
| | - Ye Wang
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China
| | - Zhang Hu
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Lingyu Zhang
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China
| | - Mingneng Liao
- Department of Applied Chemistry, School of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China
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Cisneros-Covarrubias CA, Gómez-Durán CF, Aguirre-Bañuelos P, Hernández-Esquivel RA, Palestino G. Tramadol extended-release porous silicon microcarriers: A kinetic, physicochemical and biological evaluation. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ahmad B, Khan MMA, Jahan A, Shabbir A, Jaleel H. Increased production of valuable secondary products in plants by leaf applied radiation-processed polysaccharides. Int J Biol Macromol 2020; 164:286-294. [DOI: 10.1016/j.ijbiomac.2020.07.121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 07/05/2020] [Accepted: 07/12/2020] [Indexed: 10/23/2022]
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Hardy A, Seguin C, Brion A, Lavalle P, Schaaf P, Fournel S, Bourel-Bonnet L, Frisch B, De Giorgi M. β-Cyclodextrin-Functionalized Chitosan/Alginate Compact Polyelectrolyte Complexes (CoPECs) as Functional Biomaterials with Anti-Inflammatory Properties. ACS APPLIED MATERIALS & INTERFACES 2018; 10:29347-29356. [PMID: 30107127 DOI: 10.1021/acsami.8b09733] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nowadays, the need for therapeutic biomaterials displaying anti-inflammatory properties to fight against inflammation-related diseases is continuously increasing. Compact polyelectrolyte complexes (CoPECs) represent a new class of materials obtained by ultracentrifugation of a polyanion/polycation complex suspension in the presence of salt. Here, a noncytotoxic β-cyclodextrin-functionalized chitosan/alginate CoPEC was formulated, characterized, and described as a promising drug carrier displaying an intrinsic anti-inflammatory property. This new material was successfully formed, and due to the presence of cyclodextrins, it was able to trap and release hydrophobic drugs such as piroxicam used as a model drug. The intrinsic anti-inflammatory activity of this CoPEC was analyzed in vitro using murine macrophages in the presence of lipopolysaccharide (LPS) endotoxin. In this model, it was shown that CoPEC inhibited LPS-induced TNF-α and NO release and moderated the differentiation of LPS-activated macrophages. Over time, this kind of bioactive biomaterial could constitute a new family of delivery systems and expand the list of therapeutic tools available to target inflammatory chronic diseases such as arthritis or Crohn's disease.
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Affiliation(s)
- Alexandre Hardy
- Faculté de Pharmacie , Université de Strasbourg, CNRS, Laboratoire de Conception et Application de Molécules Bioactives UMR 7199 , 74 route du Rhin , 67401 Illkirch Cedex, France
| | - Cendrine Seguin
- Faculté de Pharmacie , Université de Strasbourg, CNRS, Laboratoire de Conception et Application de Molécules Bioactives UMR 7199 , 74 route du Rhin , 67401 Illkirch Cedex, France
| | - Anaïs Brion
- Faculté de Pharmacie , Université de Strasbourg, CNRS, Laboratoire de Conception et Application de Molécules Bioactives UMR 7199 , 74 route du Rhin , 67401 Illkirch Cedex, France
| | - Philippe Lavalle
- Faculté de Chirurgie Dentaire de Strasbourg, Fédération de Médecine Translationnelle de Strasbourg , Université de Strasbourg, INSERM, Biomaterials and Bioengineering UMR 1121 , 11, Rue Humann , 67085 Strasbourg Cedex, France
| | - Pierre Schaaf
- Faculté de Chirurgie Dentaire de Strasbourg, Fédération de Médecine Translationnelle de Strasbourg , Université de Strasbourg, INSERM, Biomaterials and Bioengineering UMR 1121 , 11, Rue Humann , 67085 Strasbourg Cedex, France
| | - Sylvie Fournel
- Faculté de Pharmacie , Université de Strasbourg, CNRS, Laboratoire de Conception et Application de Molécules Bioactives UMR 7199 , 74 route du Rhin , 67401 Illkirch Cedex, France
| | - Line Bourel-Bonnet
- Faculté de Pharmacie , Université de Strasbourg, CNRS, Laboratoire de Conception et Application de Molécules Bioactives UMR 7199 , 74 route du Rhin , 67401 Illkirch Cedex, France
| | - Benoît Frisch
- Faculté de Pharmacie , Université de Strasbourg, CNRS, Laboratoire de Conception et Application de Molécules Bioactives UMR 7199 , 74 route du Rhin , 67401 Illkirch Cedex, France
| | - Marcella De Giorgi
- Faculté de Pharmacie , Université de Strasbourg, CNRS, Laboratoire de Conception et Application de Molécules Bioactives UMR 7199 , 74 route du Rhin , 67401 Illkirch Cedex, France
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Rocha-García D, Guerra-Contreras A, Reyes-Hernández J, Palestino G. Thermal and kinetic evaluation of biodegradable thermo-sensitive gelatin/poly(ethylene glycol) diamine crosslinked citric acid hydrogels for controlled release of tramadol. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.02.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Seino H, Arai Y, Nagao N, Ozawa N, Hamada K. Efficient Percutaneous Delivery of the Antimelanogenic Agent Glabridin Using Cationic Amphiphilic Chitosan Micelles. PLoS One 2016; 11:e0164061. [PMID: 27695112 PMCID: PMC5047624 DOI: 10.1371/journal.pone.0164061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 09/19/2016] [Indexed: 01/01/2023] Open
Abstract
Partially myristoylated chitosan pyrrolidone carboxylate (PMCP) is a cationic amphiphilic chitosan derivative. Glabridin (Glab) from licorice root extracts is a hydrophobic antimelanogenic agent. Here we assessed the effects of cationic Glab-containing polymeric micelles derived from PMCP (Glab/PMCP-PM) on the ability of Glab to penetrate the skin and inhibit melanogenesis using a human skin model. The amount of Glab absorbed 24 h after the application of Glab/PMCP-PM was approximately four times higher than that of conventional oil-in-water micelles (control) prepared using Tween 60. Further, the release of IL-1α, a mediator of inflammation, was not detected. Treatment with Glab/PMCP-PM significantly increased the inhibition of melanogenesis compared with control. The inhibition of melanogenesis depends upon the enhanced ability of Glab to penetrate the skin, particularly the epidermis. Moreover, the inhibition of melanogenesis and the cationic potential of the Glab/PMCP-PM levels were increased by the cationic phospholipid copolymer. Therefore, Glab/PMCP-PM shows potential as an effective transdermal delivery system for treating skin hyperpigmentation.
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Affiliation(s)
- Haruyoshi Seino
- Central Research Laboratory, Pias Corporation, 1-3-1 Murotani, Nishi-ku, Kobe, Japan
- * E-mail: (HS); (NN)
| | - Yukari Arai
- Central Research Laboratory, Pias Corporation, 1-3-1 Murotani, Nishi-ku, Kobe, Japan
| | - Norio Nagao
- Faculty of Life and Environmental Science, Prefectural University of Hiroshima, 562 Nanatsuka, Shobara, Japan
- * E-mail: (HS); (NN)
| | - Noriyasu Ozawa
- Central Research Laboratory, Pias Corporation, 1-3-1 Murotani, Nishi-ku, Kobe, Japan
| | - Kazuhiko Hamada
- Central Research Laboratory, Pias Corporation, 1-3-1 Murotani, Nishi-ku, Kobe, Japan
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Gnavi S, Barwig C, Freier T, Haastert-Talini K, Grothe C, Geuna S. The use of chitosan-based scaffolds to enhance regeneration in the nervous system. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2013; 109:1-62. [PMID: 24093605 DOI: 10.1016/b978-0-12-420045-6.00001-8] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Various biomaterials have been proposed to build up scaffolds for promoting neural repair. Among them, chitosan, a derivative of chitin, has been raising more and more interest among basic and clinical scientists. A number of studies with neuronal and glial cell cultures have shown that this biomaterial has biomimetic properties, which make it a good candidate for developing innovative devices for neural repair. Yet, in vivo experimental studies have shown that chitosan can be successfully used to create scaffolds that promote regeneration both in the central and in the peripheral nervous system. In this review, the relevant literature on the use of chitosan in the nervous tissue, either alone or in combination with other components, is overviewed. Altogether, the promising in vitro and in vivo experimental results make it possible to foresee that time for clinical trials with chitosan-based nerve regeneration-promoting devices is approaching quickly.
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Affiliation(s)
- Sara Gnavi
- Department of Clinical and Biological Sciences, Neuroscience Institute of the Cavalieri Ottolenghi Foundation (NICO), University of Turin, Ospedale San Luigi, Regione Gonzole 10, Orbassano (TO), Italy
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10
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Agüero L, García J, Valdés O, Fuentes G, Zaldivar D, Blanco MD, Katime I. Synthesis and characterization of polyelectrolyte complex microparticles for drug release. J Appl Polym Sci 2012. [DOI: 10.1002/app.38576] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Cheng Y, Yu S, Wang J, Qian H, Wu W, Jiang X. In vitro and in vivo antitumor activity of doxorubicin-loaded alginic-acid-based nanoparticles. Macromol Biosci 2012; 12:1326-35. [PMID: 22887841 DOI: 10.1002/mabi.201200165] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Indexed: 11/07/2022]
Abstract
The antitumor activities of DOX-loaded alginic acid/poly[2-(diethylamino)ethyl methacrylate] (ALG-PDEA) nanoparticles are evaluated both in vitro and in vivo. TEM imaging shows that the ALG-PDEA NPs have a spherical morphology with a size of about 120 nm. CLSM observations reveal that the negatively charged ALG-PDEA NPs can be taken up well by cells. In vivo NIR fluorescence imaging shows that the ALG-PDEA NPs can passively target the tumor area because of the EPR effect in the H22 tumor-bearing mouse. In vivo antitumor efficacy examinations indicate that DOX-loaded ALG-PDEA NPs have significantly superior efficacy in impeding tumor growth compared to free DOX and low toxicity to living mice.
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Affiliation(s)
- Yuan Cheng
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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Draget KI, Skjåk-Bræk G. Alginates: Existing and Potential Biotechnological and Medical Applications. RENEWABLE RESOURCES FOR FUNCTIONAL POLYMERS AND BIOMATERIALS 2011. [DOI: 10.1039/9781849733519-00186] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The present chapter on alginates in biotechnology and medicine comprises a description of traditional uses where alginates have been used as devices in e.g. wound dressings, as well as an in-depth introduction to possible future applications. The latter area is based on new scientific information on the immunostimulating properties of certain alginate sequences, as well as on the popularity gained by the alginate as immobilization matrix for cells. The latter opens up the use of alginate encapsulated cells for specific cell transplantation provided that the properties of the capsules are properly understood and controlled.
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Affiliation(s)
- Kurt I. Draget
- Norwegian Biopolymer Laboratory (NOBIPOL) Department of Biotechnology, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim Norway
| | - Gudmund Skjåk-Bræk
- Norwegian Biopolymer Laboratory (NOBIPOL) Department of Biotechnology, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim Norway
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Tandon PK, Singh SB. Hexacyanoferrate(III) oxidation of arsenic and its subsequent removal from the spent reaction mixture. JOURNAL OF HAZARDOUS MATERIALS 2011; 185:930-937. [PMID: 21056538 DOI: 10.1016/j.jhazmat.2010.09.109] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2010] [Revised: 07/22/2010] [Accepted: 09/30/2010] [Indexed: 05/30/2023]
Abstract
Inorganic arsenic is the most toxic form and has been classified in group 1 as carcinogenic to humans which induces lung, urinary bladder and primary skin cancer. Worldwide concern over its presence in water bodies have prompted much research and policy development focusing on the removal of this chronic human carcinogen. It has been observed that the ash of Unio (Lamellidens marginalis--the fresh water mussel) can be used successfully for the removal of arsenic(V) from the aqueous solutions at low pH (∼9.0). Initially the kinetics of oxidation of arsenic(III) by alkaline hexacyanoferrate(III), both with and without adding iridium(III) chloride was studied. Subsequently after complete removal of ferrocyanide, the removal of arsenic(V) produced in the spent reaction mixture was taken up. Out of the five ashes obtained from different sources, the ash of Unio was found to be the best which results in decreasing arsenic(V) concentration from 1000 ppb to >10 ppb, TDS from 16.9 ppt to 8.5 ppt and conductivity from 33.8 mS to 17.1 mS. Kinetic results show the possibility of graphical separation of the reaction proceeding in the absence of iridium(III) from that proceeding in the presence of iridium(III) chloride.
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Li G, Du Y, Tao Y, Deng H, Luo X, Yang J. Iron(II) cross-linked chitin-based gel beads: Preparation, magnetic property and adsorption of methyl orange. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.05.040] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chitin and chitosan as multipurpose natural polymers for groundwater arsenic removal and AS2O3 delivery in tumor therapy. Mar Drugs 2010; 8:1518-25. [PMID: 20559486 PMCID: PMC2885078 DOI: 10.3390/md8051518] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2010] [Revised: 04/23/2010] [Accepted: 04/26/2010] [Indexed: 11/21/2022] Open
Abstract
Chitin and chitosan are natural polysaccharide polymers. These polymers have been used in several agricultural, food protection and nutraceutical applications. Moreover, chitin and chitosan have been also used in biomedical and biotechnological applications as drug delivery systems or in pharmaceutical formulations. So far, there are only few studies dealing with arsenic (As) removal from groundwater using chitin or chitosan and no evidence of the use of these natural polymers for arsenic trioxide (As2O3) delivery in tumor therapy. Here we suggest that chitin and/or chitosan might have the right properties to be employed as efficient polymers for such applications. Besides, nanotechnology offers suitable tools for the fabrication of novel nanostructured materials of natural origin. Since different nanostructured materials have already been employed successfully in various multidisciplinary fields, we expect that the integration of nanotechnology and natural polymer chemistry will further lead to innovative applications for environment and medicine.
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Ma G, Zhang X, Han J, Song G, Nie J. Photo-polymeriable chitosan derivative prepared by Michael reaction of chitosan and polyethylene glycol diacrylate (PEGDA). Int J Biol Macromol 2009; 45:499-503. [DOI: 10.1016/j.ijbiomac.2009.08.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Revised: 08/07/2009] [Accepted: 08/20/2009] [Indexed: 12/22/2022]
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Zhang L, Liu Y, Wu Z, Chen H. Preparation and Characterization of Coacervate Microcapsules for the Delivery of Antimicrobial Oyster Peptides. Drug Dev Ind Pharm 2009; 35:369-78. [DOI: 10.1080/03639040802369255] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tapia C, Montezuma V, Yazdani-Pedram M. Microencapsulation by spray coagulation of diltiazem HCl in calcium alginate-coated chitosan. AAPS PharmSciTech 2008; 9:1198-206. [PMID: 19082741 DOI: 10.1208/s12249-008-9164-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2008] [Accepted: 11/05/2008] [Indexed: 11/30/2022] Open
Abstract
The aim of this work was to develop a procedure for encapsulation of diltiazem HCl by spray coagulation. Factors affecting the formulations such as the effect of NaCl on the solubility of diltiazem in alginate solution, surface tension, pH, viscosity of the coagulation medium, and the effect of drug load on drug release were studied. The drug load was increased substantially from 10 up to 320 mg/mL by adding 1.2% w/v NaCl in 1% w/v alginate solution. More stable microcapsules were obtained at pH 4.6 (acetate buffer) than at a pH 2.8 (lactic acid), and the microencapsulation process was favored by the type of chitosan that produced low turbidity and viscosity in the coagulation medium. A dose of 50 mg/mL of diltiazem HCl, 1.2% w/v NaCl, and chitosan CS allowed higher amount of drug to be encapsulated. The high water solubility of diltiazem HCl leads to fast release from the microcapsules.
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Shi X, Du Y, Sun L, Zhang B, Dou A. Polyelectrolyte complex beads composed of water-soluble chitosan/alginate: Characterization and their protein release behavior. J Appl Polym Sci 2006. [DOI: 10.1002/app.23021] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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21
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Porous alginate-Ca2+ hydrogels interpenetrated with PNIPAAm networks: Interrelationship between compressive stress and pore morphology. Eur Polym J 2005. [DOI: 10.1016/j.eurpolymj.2005.06.007] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Maciel JS, Paula HCB, Miranda MAR, Sasaki JM, de Paula RCM. Reacetylated chitosan/cashew gum gel: Preliminary study for potential utilization as drug release matrix. J Appl Polym Sci 2005. [DOI: 10.1002/app.22099] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Literature Alerts. J Microencapsul 2004; 21:359-67. [PMID: 15204601 DOI: 10.1080/02652040410001662263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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