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Tiew SX, Misran M. Physicochemical properties of acylated low molecular weight chitosans. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2017.1362637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Shu Xian Tiew
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Misni Misran
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
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2
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Schlachet I, Sosnik A. Protoporphyrin IX-modified chitosan-g-oligo(NiPAAm) polymeric micelles: from physical stabilization to permeability characterization in vitro. Biomater Sci 2018; 5:128-140. [PMID: 27905575 DOI: 10.1039/c6bm00667a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two main hurdles persist towards the more extensive bench-to-bed side translation of non-parenteral polymeric micelles. The first pertains to their thermodynamically-driven disassembly under uncontrolled dilution conditions in the biological milieu and upon interaction with biomacromolecules (e.g., proteins). The second is related to the relatively poor understanding of the pathways by which polymeric micelles improve the bioavailability of the payload by mucosal routes (e.g., intestinal). In this work, a chitosan-g-oligo(N-isopropylacrylamide) (CS-g-oligo(NiPAAm)) copolymer was modified with non-cytotoxic amounts of protoporphyrin IX (PP), a planar molecule of amphiphilic character that undergoes self-aggregation in water by forming π-π stacked supramolecular structures, to induce micellization under disfavored conditions and to serve as a fluorescent tracer for the measurement of the micelle permeability across a model of the intestinal epithelium in vitro. Findings indicated that the conjugation of PP amounts as low as 2% w/w induced the formation of micelles at temperatures below the lower critical solution temperature of oligo(NiPAAm) (30-32 °C). Moreover, permeability studies conducted at both 4 °C and 37 °C strongly suggested that despite the relatively large size of the micelles (200-300 nm), they cross the epithelial monolayer mainly by a paracellular pathway due to the opening of tight junctions. Complementary uptake studies by flow cytometry indicated that no endocytosis, though due to passive or facilitated diffusion, some internalization takes place.
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Affiliation(s)
- Inbar Schlachet
- Laboratory of Pharmaceutical Nanomaterials Science, Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
| | - Alejandro Sosnik
- Laboratory of Pharmaceutical Nanomaterials Science, Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
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Salahuddin N, Elbarbary AA, Salem ML, Elksass S. Antimicrobial and antitumor activities of 1,2,4-triazoles/polypyrrole chitosan core shell nanoparticles. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3702] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Nehal Salahuddin
- Department of Chemistry, Faculty of Science; Tanta University; Tanta Egypt
| | - Ahmed A. Elbarbary
- Department of Chemistry, Faculty of Science; Tanta University; Tanta Egypt
| | - Mohamed L. Salem
- Department of Zoology, Faculty of Science; Tanta University; Tanta Egypt
| | - Samar Elksass
- Department of Chemistry, Faculty of Science; Tanta University; Tanta Egypt
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Ramalingam P, Ko YT. Improved oral delivery of resveratrol from N-trimethyl chitosan-g-palmitic acid surface-modified solid lipid nanoparticles. Colloids Surf B Biointerfaces 2015; 139:52-61. [PMID: 26700233 DOI: 10.1016/j.colsurfb.2015.11.050] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 11/24/2015] [Accepted: 11/25/2015] [Indexed: 12/18/2022]
Abstract
Despite the therapeutic effects of resveratrol, its clinical application is restricted by its poor oral bioavailability, low water solubility, and instability. Solid lipid nanoparticles (SLNs)-based drug delivery systems have been shown to provide excellent support for the delivery of hydrophobic drugs. The poor stability and burst release behavior in stomach acidic pH conditions of SLNs result in increased aggregation of the particles in the gastrointestinal environment, limiting the success of these particles as an oral delivery system for hydrophobic drugs. N-trimethyl chitosan (TMC) graft palmitic acid (PA) (TMC-g-PA) mucoadhesive copolymer was hypothesized to be a promising candidate for the surface modification of PA-decorated resveratrol-loaded SLNs to stabilize SLNs and circumvent all the above mentioned obstacles. TMC and TMC-g-PA copolymers were therefore synthesized and characterized by (1)H-nuclear magnetic resonance ((1)H NMR) and Fourier-transformed infra-red (FT-IR) spectroscopy. Resveratrol-loaded SLNs (SLRNs) that comprised Precirol ATO 5, PA, Gelucire 50/13, Tween 80, and resveratrol as well as TMC-g-PA SLRNs were formulated and characterized in terms of physicochemical properties, stability, cytotoxicity, and in vitro and in vivo effects. The in vitro release studies of TMC-g-PA SLRNs demonstrated negligible release of resveratrol in simulated gastric and sustained release in simulated intestinal conditions and the relative bioavailability of resveratrol was furthermore found to be 3.8-fold higher from TMC-g-PA SLRNs than that from resveratrol suspension. Overall, the findings reported here indicate that TMC-g-PA SLRNs represent a potential oral drug delivery system for resveratrol.
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Affiliation(s)
| | - Young Tag Ko
- College of Pharmacy, Gachon University, Incheon 406-799, South Korea.
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Mistry KK, Layek K, Mahapatra A, RoyChaudhuri C, Saha H. A review on amperometric-type immunosensors based on screen-printed electrodes. Analyst 2015; 139:2289-311. [PMID: 24678518 DOI: 10.1039/c3an02050a] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this brief review, we summarize the recent research activities involved in the development of amperometric-type immunosensors based on screen-printed electrodes (SPEs). We focus on the underlying principle involved in these types of sensors, their fabrication and electrode surface modification. We also discuss the various factors involved in the designing of such immunosensors and how they affect their performances. Finally we provide an insight into the drawbacks associated with these SPEs.
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Affiliation(s)
- Kalyan Kumar Mistry
- CSIR-Central Mechanical Engineering Research Institute, M. G. Avenue, Durgapur-713209, India.
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Synthesis, Characterization, and Performance of a Novel Polymeric Cationic Surfactant Based on Low Molecular Weight Chitosan and 3-Chloro-2-Hydroxypropyl Dimethyl Dehydroabietyl Ammonium Chloride (CHPDMDHA). J SURFACTANTS DETERG 2015. [DOI: 10.1007/s11743-015-1676-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Sosnik A, Menaker Raskin M. Polymeric micelles in mucosal drug delivery: Challenges towards clinical translation. Biotechnol Adv 2015; 33:1380-92. [PMID: 25597531 DOI: 10.1016/j.biotechadv.2015.01.003] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 01/06/2015] [Accepted: 01/10/2015] [Indexed: 12/19/2022]
Abstract
Polymeric micelles are nanostructures formed by the self-aggregation of copolymeric amphiphiles above the critical micellar concentration. Due to the flexibility to tailor different molecular features, they have been exploited to encapsulate motley poorly-water soluble therapeutic agents. Moreover, the possibility to combine different amphiphiles in one single aggregate and produce mixed micelles that capitalize on the features of the different components substantially expands the therapeutic potential of these nanocarriers. Despite their proven versatility, polymeric micelles remain elusive to the market and only a few products are currently undergoing advanced clinical trials or reached clinical application, all of them for the therapy of different types of cancer and administration by the intravenous route. At the same time, they emerge as a nanotechnology platform with great potential for non-parenteral mucosal administration. However, for this, the interaction of polymeric micelles with mucus needs to be strengthened. The present review describes the different attempts to develop mucoadhesive polymeric micelles and discusses the challenges faced in the near future for a successful bench-to-bedside translation.
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Affiliation(s)
- Alejandro Sosnik
- Laboratory of Pharmaceutical Nanomaterials Science, Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
| | - Maya Menaker Raskin
- Laboratory of Pharmaceutical Nanomaterials Science, Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa, Israel
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Sun F, Wang Y, Wei Y, Cheng G, Ma G. Thermo-triggered drug delivery from polymeric micelles of poly(N-isopropylacrylamide-co-acrylamide)-b-poly(n-butyl methacrylate) for tumor targeting. J BIOACT COMPAT POL 2014. [DOI: 10.1177/0883911514535288] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Novel temperature-sensitive micelles, possessing a core-shell structure, were successfully fabricated and evaluated as possible systems for targeting anticancer drugs to solid tumors. The amphiphilic block copolymer poly( N-isopropylacrylamide- co-acrylamide)-b-poly( n-butyl methacrylate) was used to achieve a stimuli-responsive on/off release and spatial specificity. The anticancer drug methotrexate, which is poorly water soluble, was used as the model. Fourier transform–infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, gel-permeation chromatography, and critical micelle concentration were used to evaluate the successful synthesis of block copolymers with a lower critical solution temperature ~40°C. Based on transmission electron microscope images, the micelles are spherical particles with narrow size distribution. The thermally triggered release of methotrexate was observed in vitro. Quartz crystal microbalance with dissipation was used to investigate the interactions of the polymeric micelles with bovine serum albumin, to illustrate protein adsorption and cell attachment. Cytotoxicity studies were conducted on Lewis lung carcinoma cells, and the anticancer activity of methotrexate-loaded micelles was significantly enhanced in combination with hyperthermia. The thermo-sensitive characteristics of the micelles make them applicable as smart drug delivery systems, when combined with localized hyperthermia.
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Affiliation(s)
- Feilong Sun
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
- Department of Pharmaceutics, Shenyang Pharmaceutical University, Liaoning, P.R. China
| | - Yuxia Wang
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
| | - Yi Wei
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
| | - Gang Cheng
- Department of Pharmaceutics, Shenyang Pharmaceutical University, Liaoning, P.R. China
| | - Guanghui Ma
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, P.R. China
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9
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In vitro evaluation on novel modified chitosan for targeted antitumor drug delivery. Carbohydr Polym 2013; 92:545-54. [DOI: 10.1016/j.carbpol.2012.08.112] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 08/29/2012] [Accepted: 08/29/2012] [Indexed: 01/27/2023]
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Kulthe SS, Choudhari YM, Inamdar NN, Mourya V. Polymeric micelles: authoritative aspects for drug delivery. Des Monomers Polym 2012. [DOI: 10.1080/1385772x.2012.688328] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- Sushant S. Kulthe
- a Government College of Pharmacy , Aurangabad , 431005 , Maharashtra , India
| | - Yogesh M. Choudhari
- a Government College of Pharmacy , Aurangabad , 431005 , Maharashtra , India
| | - Nazma N. Inamdar
- a Government College of Pharmacy , Aurangabad , 431005 , Maharashtra , India
| | - Vishnukant Mourya
- a Government College of Pharmacy , Aurangabad , 431005 , Maharashtra , India
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Rata-Aguilar A, Sánchez-Moreno P, Jódar-Reyes AB, Martín-Rodríguez A, Boulaiz H, Marchal-Corrales JA, Peula-García JM, Ortega-Vinuesa JL. Colloidal stability and “in vitro” antitumor targeting ability of lipid nanocapsules coated by folate–chitosan conjugates. J BIOACT COMPAT POL 2012. [DOI: 10.1177/0883911512447492] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this study, the synthesis and characterization of lipid nanocapsules coated with folate–chitosan conjugates at varying folate concentrations are reported; these nanocapsules have a potential application as anticancer drug carriers. The main goal of this study was to evaluate (a) the colloidal stability of the particles and (b) their cell targeting. A classical colloidal characterization of the nanocapsules was carried out by analyzing size, electrokinetic charge, and stability in different saline solutions, including cell culture media. At neutral pH, the stability was improved by the presence of folate due to electrical interactions. In addition, folate modulated the hydrophilic/phobic nature of the surface, which became critical to keep the systems stable (or not) under physiological saline conditions due to the action of short-range repulsive hydration forces. The cellular uptake of our nanocapsules was evaluated by working with four tumor cell lines. Both fluorescent analyses with particles colored by Nile Red, and antitumor activity of our systems loaded with docetaxel, demonstrated that the folate-mediated internalization of the particles in the cancer cells was improved when the nanocapsules were coated by folate–chitosan conjugates.
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Affiliation(s)
| | | | - Ana B Jódar-Reyes
- Department of Applied Physics, University of Granada, Granada, Spain
| | | | - Houria Boulaiz
- Department of Human Anatomy and Embryology, Regenerative Biomedicine Institute (IBIMER), University of Granada, Granada, Spain
| | - Juan A Marchal-Corrales
- Department of Human Anatomy and Embryology, Regenerative Biomedicine Institute (IBIMER), University of Granada, Granada, Spain
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Layek B, Singh J. N-hexanoyl, N-octanoyl and N-decanoyl chitosans: Binding affinity, cell uptake, and transfection. Carbohydr Polym 2012; 89:403-10. [PMID: 24750737 DOI: 10.1016/j.carbpol.2012.03.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 03/05/2012] [Accepted: 03/07/2012] [Indexed: 01/09/2023]
Abstract
Low transfection efficiency of chitosan limits its use as a non-viral vector for practical purposes. This study was designed to investigate the effect of fatty acyl chain length on physicochemical properties, pDNA binding affinity, cell uptake, and in vitro transfection efficiency of N-acyl chitosan (NAC). NAC polymers were synthesized by carbodiimide mediated coupling reaction of chitosan with n-hexanoic, n-octanoic, and n-decanoic acid, respectively. These NAC polymers effectively condensed pDNA resulting in the size range of 220-342 nm with net positive charge. NAC polymers also showed good pDNA binding capacity, high protection of pDNA from nuclease degradation and excellent biocompatibility. Transfection efficiency of chitosan, in HEK 293 cells, was enhanced 15-25-fold after coupling with fatty acid and increased with a decrease in fatty acyl chain length of NAC. Thus, the present study demonstrates that the NAC polymers hold great potential as novel non-viral gene delivery vector.
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Affiliation(s)
- Buddhadev Layek
- Department of Pharmaceutical Sciences, College of Pharmacy, Nursing, and Allied Sciences, North Dakota State University, Fargo, ND 58105, USA
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Liu J, Li H, Jiang X, Zhang C, Ping Q. Novel pH-sensitive chitosan-derived micelles loaded with paclitaxel. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.04.084] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
A chitosan, with citric acid cross-linked CMS grafted with methacrylic acid and poly(ethyleneglycol monomethyl ether methacrylate), was prepared for oral delivery of insulin. Increases in chitosan content increased the bioadhesivity. The equilibrium swelling and in vitro release profiles in enzyme-free simulated gastric (SGF) and intestinal fluids (SIF) by the insulin entrapped gels were established. Increasing the chitosan content in the copolymer enhanced the hydrolysis in the SIF. In all cases, the biological activity of insulin was retained. The antimicrobial activity of hydrogels was examined against a Staphylococcus aureus. Based on these results, new designs to improve insulin release behavior are being carried out.
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Affiliation(s)
- Mehrdad Mahkam
- Chemistry Department, Azarbaijan University of Tarbiat Moallem, Tabriz, Iran,
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Wei XH, Niu YP, Xu YY, Du YZ, Hu FQ, Hong Yuan. Salicylic Acid-grafted Chitosan Oligosaccharide Nanoparticle for Paclitaxel Delivery. J BIOACT COMPAT POL 2010. [DOI: 10.1177/0883911510363548] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A hydrotropic agent, salicylic acid (SA), was grafted to chitosan oligosaccharide (CSO) backbone to develop a CSO/SA conjugate. The CSO/SA self-assembled to form nanoparticles (NPs) in aqueous medium. The sizes of the NPs were smaller as more SA was grafted and when lower molecular weight CSO was used. The ζ-potentials of all CSO/SA NPs were above 40 mV. The critical aggregation concentrations of NPs decreased from 454.79 to 164.0 μg/mL by increasing the grafted SA content or the CSO Mw. Paclitaxel (PTX)-loaded NPs were prepared by a dialysis method; the particle sizes and ζ-potentials were smaller than the blank NPs. A series of PTX-loaded CSO28,000/SA50% NPs were prepared; as the size decreased or the drug content increased, the in vitro release rate increased. The in vitro cytotoxicity of blank CSO/SA NPs was determined using the MCF-7 cell line. The CSO/SA provides a new means of making a stable delivery for PTX.
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Affiliation(s)
- Xiao-Hong Wei
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China,
| | - Yang-Ping Niu
- College of Pharmaceutical Science, Zhejiang University of Technology Hangzhou, 310032, P. R. China
| | - Yang-Yan Xu
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China, College of Pharmaceutical Science, Zhejiang University of Technology Hangzhou, 310032, P. R. China
| | - Yong-Zhong Du
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China
| | - Fu-Qiang Hu
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China
| | - Hong Yuan
- College of Pharmaceutical Science, Zhejiang University Hangzhou, 310058, P. R. China
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