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Wani SUD, Ali M, Mehdi S, Masoodi MH, Zargar MI, Shakeel F. A review on chitosan and alginate-based microcapsules: Mechanism and applications in drug delivery systems. Int J Biol Macromol 2023; 248:125875. [PMID: 37473899 DOI: 10.1016/j.ijbiomac.2023.125875] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 07/14/2023] [Accepted: 07/16/2023] [Indexed: 07/22/2023]
Abstract
Natural polymers, like chitosan and alginate have potential of appearance, as well as the changes and handling necessary to make it acceptable vehicle for the controlled release of medicines and biomolecules. Microcapsules are characterized as micrometer-sized particulate that can be employed to store chemicals within them. In the present review, we have discussed various advantages, components of microcapsules, release mechanisms, preparation methods, and their applications in drug delivery systems. The preparation methods exhibited strong encapsulation effectiveness and may be used in a wide range of pharmaceutical and biomedical applications. The major advantages of using the microencapsulation technique are, sustained and controlled delivery of drugs, drug targeting, improvement of shelf life, stabilization, immobilization of enzymes and microorganisms. As new biomaterials are developed for the body, they are better suited to the development of pharmaceutical systems than traditional pharmaceuticals because they are more reliable, biocompatible, biodegradable, and nontoxic. Furthermore, the designed microcapsules had been capable of shielding the essential components from hostile environments. More advanced techniques could be developed in the future to facilitate the formulation and applications of microcapsules and working with the pharmaceutical and medical industries.
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Affiliation(s)
- Shahid Ud Din Wani
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Srinagar 190006, India.
| | - Mohammad Ali
- Department of Pharmacy Practice, East Point College of Pharmacy, Bangalore 560027, India
| | - Seema Mehdi
- Department of Pharmacology, JSSCollege of Pharmacy, Mysuru 570015, India
| | - Mubashir Hussain Masoodi
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Srinagar 190006, India
| | - Mohammed Iqbal Zargar
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Srinagar 190006, India
| | - Faiyaz Shakeel
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
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2
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Smart membranes for biomedical applications. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Qi L, Qiao J. Design of Switchable Enzyme Carriers Based on Stimuli-Responsive Porous Polymer Membranes for Bioapplications. ACS APPLIED BIO MATERIALS 2021; 4:4706-4719. [PMID: 35007021 DOI: 10.1021/acsabm.1c00338] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Design of efficient enzyme carriers, where enzymes are conjugated to supports, has become an attractive research avenue. Immobilized enzymes are advantageous for practical applications because of their convenience in handling, ease of separation, and good reusability. However, the main challenge is that these traditional enzyme carriers are unable to regulate the enzymolysis efficiency or to protect the enzymes from proteolytic degradation, which restricts their effectiveness of enzymes in bioapplications. Enlightened by the stimuli-responsive channels in the natural cell membranes, conjugation of the enzymes within flat-sheet stimuli-responsive porous polymer membranes (SR-PPMs) as artificial cell membranes is an efficient strategy for circumventing this challenge. Controlled by the external stimuli, the multifunctional polymer chains, which are incorporated within the membranes and attached to the enzyme, change their structures to defend the enzyme from the external environmental disturbances and degradation by proteinases. Specifically, smart SR-PPM enzyme carriers (SR-PPMECs) not only permit convective substrate transfer through the accessible porous network, dramatically improving enzymolysis efficiency due to the adjustable pore sizes and the confinement effect, but they also act as molecular switches for regulating its permeability and selectivity. In this review, the concept of SR-PPMECs is presented. It covers the latest developments in design strategies of flat-sheet SR-PPFMs, fabrication protocols of SR-PPFMECs, strategies for the regulation of enzymolysis efficiency, and their cutting-edge bioapplications.
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Affiliation(s)
- Li Qi
- Beijing National Laboratory of Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Juan Qiao
- Beijing National Laboratory of Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
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4
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Adeleke OA. In vitro characterization of a synthetic polyamide-based erodible compact disc for extended drug release. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03954-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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5
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Khan Z, Al-Thabaiti SA. Biogenic silver nanoparticles: Green synthesis, encapsulation, thermal stability and antimicrobial activities. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111102] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Fu M, Zhang C, Dai Y, Li X, Pan M, Huang W, Qian H, Ge L. Injectable self-assembled peptide hydrogels for glucose-mediated insulin delivery. Biomater Sci 2018; 6:1480-1491. [DOI: 10.1039/c8bm00006a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Closed-loop glucose-responsive insulin delivery with excellent biocompatibility has the potential to improve the health and quality of life of diabetic patients.
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Affiliation(s)
- Mian Fu
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- PR China
| | - Chenyu Zhang
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- PR China
| | - Yuxuan Dai
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- PR China
| | - Xue Li
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- PR China
| | - Miaobo Pan
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- PR China
| | - Wenlong Huang
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- PR China
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease
| | - Hai Qian
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- PR China
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease
| | - Liang Ge
- Department of Pharmaceutical
- China Pharmaceutical University
- Nanjing 210009
- PR China
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7
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Glucose Oxidase-Based Glucose-Sensitive Drug Delivery for Diabetes Treatment. Polymers (Basel) 2017; 9:polym9070255. [PMID: 30970930 PMCID: PMC6432078 DOI: 10.3390/polym9070255] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/19/2017] [Accepted: 06/25/2017] [Indexed: 11/21/2022] Open
Abstract
The glucose-sensitive drug delivery systems based on glucose oxidase (GOD), which exhibit highly promising applications in diabetes therapy, have attracted much more interest in recent years. The self-regulated drug delivery systems regulate drug release by glucose concentration automatically and continuously to control the blood glucose level (BGL) in normoglycemic state. This review covers the recent advances at the developments of GOD-based glucose-sensitive drug delivery systems and their in vivo applications for diabetes treatment. The applications of GOD-immobilized platforms, such as self-assembly layer-by-layer (LbL) films and polymer vesicles, cross-linking hydrogels and microgels, hybrid mesoporous silica nanoparticles, and microdevices fabricated with insulin reservoirs have been surveyed. The glucose-sensitive drug delivery systems based on GOD are expected to be a typical candidate for smart platforms for potential applications in diabetes therapy.
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Miao L, Tu Y, Yang Y, Lin S, Hu J, Zhang M, Li Y, Li F, Mo Y. Robust Stimuli-Responsive Membranes Prepared from a Blend of Polysulfone and a Graft Copolymer Bearing Binary Side Chains with Thermo- and pH-Responsive Switching Behavior. Chemistry 2017; 23:7737-7747. [DOI: 10.1002/chem.201605263] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 02/18/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Lei Miao
- Foshan University; Jiangwan 1st Road 18 528000 Foshan P. R. China
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Xingke Road 368 510675 Guangzhou P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; 510650 Guangzhou P. R. China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; 510650 Guangzhou P. R. China
| | - Yuanyuan Tu
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Xingke Road 368 510675 Guangzhou P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; 510650 Guangzhou P. R. China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; 510650 Guangzhou P. R. China
| | - Yang Yang
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Xingke Road 368 510675 Guangzhou P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; 510650 Guangzhou P. R. China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; 510650 Guangzhou P. R. China
| | - Shudong Lin
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Xingke Road 368 510675 Guangzhou P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; 510650 Guangzhou P. R. China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; 510650 Guangzhou P. R. China
| | - Jiwen Hu
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Xingke Road 368 510675 Guangzhou P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; 510650 Guangzhou P. R. China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; 510650 Guangzhou P. R. China
| | - Min Zhang
- Foshan University; Jiangwan 1st Road 18 528000 Foshan P. R. China
| | - Yue Li
- Foshan University; Jiangwan 1st Road 18 528000 Foshan P. R. China
| | - Fei Li
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Xingke Road 368 510675 Guangzhou P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; 510650 Guangzhou P. R. China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; 510650 Guangzhou P. R. China
| | - Yangmiao Mo
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Xingke Road 368 510675 Guangzhou P. R. China
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; 510650 Guangzhou P. R. China
- Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics; 510650 Guangzhou P. R. China
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9
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Li X, Fu M, Wu J, Zhang C, Deng X, Dhinakar A, Huang W, Qian H, Ge L. pH-sensitive peptide hydrogel for glucose-responsive insulin delivery. Acta Biomater 2017; 51:294-303. [PMID: 28069504 DOI: 10.1016/j.actbio.2017.01.016] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 12/13/2016] [Accepted: 01/05/2017] [Indexed: 12/21/2022]
Abstract
Glucose-responsive system is one of important options for self-regulated insulin delivery to treat diabetes, which has become an issue of great public health concern in the world. In this study, we developed a novel and biocompatible glucose-responsive insulin delivery system using a pH-sensitive peptide hydrogel as a carrier loaded with glucose oxidase, catalase and insulin. The peptide could self-assemble into hydrogel under physiological conditions. When hypoglycemia is encountered, neighboring alkaline amino acid side chains are significantly repulsed due to reduced local pH by the enzymatic conversion of glucose into gluconic acid. This is followed by unfolding of individual hairpins, disassembly and release of insulin. The glucose-responsive hydrogel system was characterized on the basis of structure, conformation, rheology, morphology, acid-sensitivity and the amount of consistent release of insulin in vitro and vivo. The results illustrated that our system can not only regulate the blood glucose levels in vitro but also in mice models having STZ-induced diabetes. STATEMENT OF SIGNIFICANCE In this report, we have shown the following significance supported by the experimental results. 1. We successfully developed, characterized and screened a novel pH-responsive peptide. 2. We successfully developed a novel and biocompatible pH-sensitive peptide hydrogel as glucose-responsive insulin delivery system loaded with glucose oxidase, catalase and insulin. 3. We successfully confirmed that the hydrogel platform could regulate the blood glucose level in vitro and in vivo. Overall, we have shown enough significance and novelty with this smart hydrogel platform in terms of biomaterials, peptide chemistry, self-assembly, hydrogel and drug delivery. So we believe this manuscript is suitable for Acta Biomaterialia.
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Affiliation(s)
- Xue Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Mian Fu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Jun Wu
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guang Dong Province, School of Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Sun Yat-sen University, Guangzhou 510006, PR China.
| | - Chenyu Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Xin Deng
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Arvind Dhinakar
- University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada
| | - Wenlong Huang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China; Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Hai Qian
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China; Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China.
| | - Liang Ge
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China.
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10
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Yunessnia lehi A, Akbari A. Membrane capsules with hierarchical Mg(OH)2 nanostructures as novel adsorbents for dyeing wastewater treatment in carpet industries. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.10.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Dave VS, Gupta D, Yu M, Nguyen P, Varghese Gupta S. Current and evolving approaches for improving the oral permeability of BCS Class III or analogous molecules. Drug Dev Ind Pharm 2016; 43:177-189. [PMID: 27998192 DOI: 10.1080/03639045.2016.1269122] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The Biopharmaceutics Classification System (BCS) classifies pharmaceutical compounds based on their aqueous solubility and intestinal permeability. The BCS Class III compounds are hydrophilic molecules (high aqueous solubility) with low permeability across the biological membranes. While these compounds are pharmacologically effective, poor absorption due to low permeability becomes the rate-limiting step in achieving adequate bioavailability. Several approaches have been explored and utilized for improving the permeability profiles of these compounds. The approaches include traditional methods such as prodrugs, permeation enhancers, ion-pairing, etc., as well as relatively modern approaches such as nanoencapsulation and nanosizing. The most recent approaches include a combination/hybridization of one or more traditional approaches to improve drug permeability. While some of these approaches have been extremely successful, i.e. drug products utilizing the approach have progressed through the USFDA approval for marketing; others require further investigation to be applicable. This article discusses the commonly studied approaches for improving the permeability of BCS Class III compounds.
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Affiliation(s)
- Vivek S Dave
- a Wegmans School of Pharmacy , St. John Fisher College , Rochester , NY , USA
| | - Deepak Gupta
- b Lake Eerie College of Osteopathic Medicine , School of Pharmacy, Pharmaceutical Sciences , Bradenton , FL , USA
| | - Monica Yu
- b Lake Eerie College of Osteopathic Medicine , School of Pharmacy, Pharmaceutical Sciences , Bradenton , FL , USA
| | - Phuong Nguyen
- b Lake Eerie College of Osteopathic Medicine , School of Pharmacy, Pharmaceutical Sciences , Bradenton , FL , USA
| | - Sheeba Varghese Gupta
- c Department of Pharmaceutical Sciences , USF College of Pharmacy , Tampa , FL , USA
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12
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Yang XL, Ju XJ, Mu XT, Wang W, Xie R, Liu Z, Chu LY. Core-Shell Chitosan Microcapsules for Programmed Sequential Drug Release. ACS APPLIED MATERIALS & INTERFACES 2016; 8:10524-34. [PMID: 27052812 DOI: 10.1021/acsami.6b01277] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel type of core-shell chitosan microcapsule with programmed sequential drug release is developed by the microfluidic technique for acute gastrosis therapy. The microcapsule is composed of a cross-linked chitosan hydrogel shell and an oily core containing both free drug molecules and drug-loaded poly(lactic-co-glycolic acid) (PLGA) nanoparticles. Before exposure to acid stimulus, the resultant microcapsules can keep their structural integrity without leakage of the encapsulated substances. Upon acid-triggering, the microcapsules first achieve burst release due to the acid-induced decomposition of the chitosan shell. The encapsulated free drug molecules and drug-loaded PLGA nanoparticles are rapidly released within 60 s. Next, the drugs loaded in the PLGA nanoparticles are slowly released for several days to achieve sustained release based on the synergistic effect of drug diffusion and PLGA degradation. Such core-shell chitosan microcapsules with programmed sequential drug release are promising for rational drug delivery and controlled-release for the treatment of acute gastritis. In addition, the microcapsule systems with programmed sequential release provide more versatility for controlled release in biomedical applications.
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Affiliation(s)
- Xiu-Lan Yang
- School of Chemical Engineering and ‡State Key Laboratory of Polymer Materials Engineering, and Collaborative Innovation Center for Biomaterials Science and Technology, Sichuan University , Chengdu 610065, P. R. China
| | - Xiao-Jie Ju
- School of Chemical Engineering and ‡State Key Laboratory of Polymer Materials Engineering, and Collaborative Innovation Center for Biomaterials Science and Technology, Sichuan University , Chengdu 610065, P. R. China
| | - Xiao-Ting Mu
- School of Chemical Engineering and ‡State Key Laboratory of Polymer Materials Engineering, and Collaborative Innovation Center for Biomaterials Science and Technology, Sichuan University , Chengdu 610065, P. R. China
| | - Wei Wang
- School of Chemical Engineering and ‡State Key Laboratory of Polymer Materials Engineering, and Collaborative Innovation Center for Biomaterials Science and Technology, Sichuan University , Chengdu 610065, P. R. China
| | - Rui Xie
- School of Chemical Engineering and ‡State Key Laboratory of Polymer Materials Engineering, and Collaborative Innovation Center for Biomaterials Science and Technology, Sichuan University , Chengdu 610065, P. R. China
| | - Zhuang Liu
- School of Chemical Engineering and ‡State Key Laboratory of Polymer Materials Engineering, and Collaborative Innovation Center for Biomaterials Science and Technology, Sichuan University , Chengdu 610065, P. R. China
| | - Liang-Yin Chu
- School of Chemical Engineering and ‡State Key Laboratory of Polymer Materials Engineering, and Collaborative Innovation Center for Biomaterials Science and Technology, Sichuan University , Chengdu 610065, P. R. China
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13
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Nechikkattu R, Athiyanathil S. Thermo-responsive poly(ethylene-co-vinyl alcohol) based asymmetric membranes. RSC Adv 2016. [DOI: 10.1039/c6ra17002a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper reports surface modification of poly(ethylene-co-vinyl alcohol) microporous membranes, by surface-initiated atom transfer radical polymerization of N-isopropylacrylamide and its subsequent applications in thermo responsive permeation.
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Affiliation(s)
- Riyasudheen Nechikkattu
- Materials Research Laboratory
- Department of Chemistry
- National Institute of Technology Calicut
- Calicut-673601
- India
| | - Sujith Athiyanathil
- Materials Research Laboratory
- Department of Chemistry
- National Institute of Technology Calicut
- Calicut-673601
- India
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14
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Abstract
This review highlights recent developments in stimuli-responsive smart gating membranes, including design and fabrication strategies, versatile stimuli-responsive gating models and advanced applications.
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Affiliation(s)
- Zhuang Liu
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Wei Wang
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Rui Xie
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Xiao-Jie Ju
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
- State Key Laboratory of Polymer Materials Engineering
| | - Liang-Yin Chu
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
- State Key Laboratory of Polymer Materials Engineering
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15
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Zaheer Z, Aazam ES, Hussain S. Reversible encapsulation of silver nanoparticles into the helix of amylose (water soluble starch). RSC Adv 2016. [DOI: 10.1039/c6ra09319a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Natural biodegradable polymeric starch capped Ag-nanoparticles (AgNPs) were prepared by using extract of Dioscorea deltoidea in the presence of starch.
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Affiliation(s)
- Zoya Zaheer
- Department of Chemistry
- Faculty of Science
- King Abdulaziz University
- Jeddah
- Saudi Arabia
| | - Elham Shafik Aazam
- Department of Chemistry
- Faculty of Science
- King Abdulaziz University
- Jeddah
- Saudi Arabia
| | - Shokit Hussain
- Department of Chemistry
- Govt Degree College Poonch
- Higher Education Department
- India
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16
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Du HH, Xiao XC. Fabrication of rapidly-responsive switches based on the coupling effect of polyacrylamide and poly(acrylic acid) without IPN structures. RSC Adv 2015. [DOI: 10.1039/c5ra14491d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel coupling membrane systems with thermoresponsive switches composed of two different polymers PAAM and PAAC have been successfully developed. The membranes show significant positive switch characteristics and higher thermoresponsive speeds.
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Affiliation(s)
- Huan-Huan Du
- School of Pharmacy
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Xin-Cai Xiao
- School of Pharmacy
- South-Central University for Nationalities
- Wuhan 430074
- China
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17
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He F, Mei L, Ju XJ, Xie R, Wang W, Liu Z, Wu F, Chu LY. pH-responsive controlled release characteristics of solutes with different molecular weights diffusing across membranes of Ca-alginate/protamine/silica hybrid capsules. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.10.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Ruan X, Zhan LM, Gao XX, Yan LY, Zhang H, Zhu ZY, Wang Q, Jiang DA. Separation and purification of flavonoid from Taxus remainder extracts free of taxoids using polystyrene and polyamide resin. J Sep Sci 2013; 36:1925-34. [PMID: 23936912 DOI: 10.1002/jssc.201201189] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
An efficient separation process of flavonoid from Taxus wallichiana var. mairei remainder extracts free of taxoids was developed in this study. AB-8 macroporous resin and polyamide resin offered the fine adsorption capacity, and its adsorption rate at 30°C fitted well to the Langmuir and Freundich isotherms. Resin dynamic adsorption and desorption experiments were conducted to optimize the separation process of total flavonoids from T. wallichiana var. mairei remainder extracts free of taxoids. The optimum parameters for adsorption by AB-8 resin were as follows: (1) the concentration of flavonoids in a sample solution of 5.61 mg/mL with a processing volume of 2 bed volume (BV) (60 mL); (2) for desorption, ethanol-water (80:20, v/v), with 6 BV as an eluent at a flow rate of 2 BV/h. After a one-run treatment with AB-8 resin, the content of flavonoids was increased 5.10-fold from 4.05 to 20.65%. The optimum parameters for adsorption by polyamide resin were as follows: processing volume of 2 BV (30 mL); for desorption, ethanol-water (70:30, v/v), with 8 BV as an eluent at a flow rate of 2 BV/h. After one-run treatment with polyamide resin, the content of total flavonoids increased from 20.65 to 65.21%. The method will provide a potential approach for large-scale separation and purification of flavonoid for its wide pharmaceutical use.
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Affiliation(s)
- Xiao Ruan
- College of Life Science, Zhejiang University, Hangzhou, P. R. China
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Adeleke OA, Choonara YE, Kumar P, du Toit LC, Tomar LK, Tyagi C, Pillay V. Evaluation of the impacts of formulation variables and excipients on the drug release dynamics of a polyamide 6,10-based monolithic matrix using mathematical tools. AAPS PharmSciTech 2013; 14:1349-59. [PMID: 23990121 DOI: 10.1208/s12249-013-0021-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Accepted: 08/05/2013] [Indexed: 11/30/2022] Open
Abstract
Drug release from hydrophilic matrices is regulated mainly by polymeric erosion, disentanglement, dissolution, swelling front movement, drug dissolution and diffusion through the polymeric matrix. These processes depend upon the interaction between the dissolution media, polymeric matrix and drug molecules, which can be significantly influenced by formulation variables and excipients. This study utilized mathematical parameters to evaluate the impacts of selected formulation variables and various excipients on the release performance of hydrophilic polyamide 6,10 (PA 6,10) monolithic matrix. Amitriptyline HCl and theophylline were employed as the high and low solubility model drugs, respectively. The incorporation of different excipient concentrations and changes in formulation components influenced the drug release dynamics as evidenced by computed mathematical quantities (t x%, MDT x%, f 1, f 2, k 1, k 2, and К F). The effects of excipients on drug release from the PA 6,10 monolithic matrix was further elucidated using static lattice atomistic simulations wherein the component energy refinements corroborates the in vitro and in silico experimental data. Consequently, the feasibility of modulating release kinetics of drug molecules from the novel PA 6,10 monolithic matrix was well suggested.
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Hassan HE, Mohamed AAB, Bakhiet AO, Ahmed HG. Immunohistochemical expression of COX2 and iNOS in bladder cancer and its association with urinary schistosomiasis among Sudanese patients. Infect Agent Cancer 2013; 8:9. [PMID: 23414519 PMCID: PMC3599865 DOI: 10.1186/1750-9378-8-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Accepted: 02/11/2013] [Indexed: 12/31/2022] Open
Abstract
AIMS The purpose of this study was to determine if any relationship exists between expression of COX2 and iNOS markers and urinary schistosomiasis in bladder cancers. METHODOLOGY Immunohistochemical expression of COX2 and iNOS was assessed in formalin fixed paraffin wax processed tissues obtained from 155 patients with bladder cancers (87 SCC and 68 TCC) and 39 patients with benign bladder cystitis. RESULTS The overall immune-expressions of COX2 and iNOS were 71.6% and 57.2% respectively, of the 194 bladder lesions. A significant Positive association between COX2 or iNOS expression with bladder lesions (SCC, TCC and cystitis) was found (p.value = 0.000). COX2 and iNOS were co-expressed among 73(83.9%) of SCC, 15(22.1%) of TCC and 11(28.2%) of the cystitis group. The relationship between COX2 and iNOS immunostaining and Schistosomal ova positivity was statistically determined by P values 0.0565 and 0.1223 for Cox2 and iNOS, respectively. CONCLUSION There are high rates of positive expression of COX2 and iNOS among Sudanese patients with Schistosomal-related bladder lesions. There might be strong association between high rates of bladder cancers and urinary Schistosomiasis in the Sudan since, the great majority of lesions were positive for COX2.
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Affiliation(s)
- Hassan Elsiddig Hassan
- Department of Histopathology and Cytology, Faculty of Medical Laboratory Science, University of Khartoum, Khartoum, Sudan.
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CHU L, XIE R, JU X. Stimuli-responsive Membranes: Smart Tools for Controllable Mass-transfer and Separation Processes. Chin J Chem Eng 2011. [DOI: 10.1016/s1004-9541(11)60070-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Haidong L, Fang Y, Zhihong T, Changle R. Study on preparation of β-cyclodextrin encapsulation tea extract. Int J Biol Macromol 2011; 49:561-6. [DOI: 10.1016/j.ijbiomac.2011.06.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 05/29/2011] [Accepted: 06/09/2011] [Indexed: 11/16/2022]
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Sato K, Yoshida K, Takahashi S, Anzai JI. pH- and sugar-sensitive layer-by-layer films and microcapsules for drug delivery. Adv Drug Deliv Rev 2011; 63:809-21. [PMID: 21510988 DOI: 10.1016/j.addr.2011.03.015] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 01/11/2011] [Accepted: 03/30/2011] [Indexed: 12/17/2022]
Abstract
The present review provides an overview on the recent progress in the development of pH- and sugar-sensitive layer-by-layer (LbL) thin films and microcapsules in relation to their potential applications in drug delivery. pH-sensitive LbL films and microcapsules have been studied for the development of peptide and protein drug delivery systems to the gastrointestinal tract, anti-cancer drugs to tumor cells, anti-inflammatory drugs to inflamed tissues, and the intracellular delivery of DNA, where pH is shifted from neutral to acidic. pH-induced decomposition or permeability changes of LbL films and microcapsules form the basis for the pH-sensitive release of drugs. Sugar-sensitive LbL films and microcapsules have been studied mainly for the development of an artificial pancreas that can release insulin in response to the presence of glucose. Therefore, glucose oxidase, lectin, and phenylboronic acid have been used for the construction of glucose-sensitive LbL films and microcapsules. LbL film-coated islet cells are also candidates for an artificial pancreas. An artificial pancreas would make a significant contribution to improving the quality of life of diabetic patients by replacing repeated subcutaneous insulin injections.
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Affiliation(s)
- Katsuhiko Sato
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai, Japan
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Popa AM, Angeloni S, Bürgi T, Hubbell JA, Heinzelmann H, Pugin R. Dynamic perspective on the function of thermoresponsive nanopores from in situ AFM and ATR-IR investigations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:15356-65. [PMID: 20822117 DOI: 10.1021/la102611k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This article describes the morphological and chemical characterization of stimuli-responsive functionalized silicon surfaces provided in parallel by atomic force spectroscopy (AFM) and Fourier transform infrared spectroscopy (FT-IR) enhanced by the single-beam sample reference attenuated total reflection method (SBSR-ATR). The stimuli-responsive behavior of the surfaces was obtained by grafting-to in melt carboxyl-terminated poly-N-isopropylacryl amides (PNIPAAM) with different degree of polymerization (DP) on epoxide-functionalized silicon substrates. The unprecedented real time and in situ physicochemical insight into the temperature-triggered response of the densely packed superficial brushes allowed for the selection of a PNIPAAM with a specific DP as a suitable polymer for the fabrication of silicon membranes exhibiting switchable nanopores. The fabrication process combines the manufacture of nanoporous silicon surfaces and their subsequent chemical functionalization by the grafting-to in melt of the selected polymer. Then, relevant information was obtained in what concerns the chemical modifications behind the topographical changes that drive the functioning of PNIPAAM-based hybrid nanovalves as well as the timescale on which the opening and closing of the nanopores occur.
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Affiliation(s)
- Ana Maria Popa
- Centre Suisse d'Electronique et de Microtechnique SA, Rue Jaquet Droz 1, CH-2000 Neuchâtel, Switzerland.
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Tokarev I, Minko S. Stimuli-responsive porous hydrogels at interfaces for molecular filtration, separation, controlled release, and gating in capsules and membranes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:3446-62. [PMID: 20473983 DOI: 10.1002/adma.201000165] [Citation(s) in RCA: 177] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A continuously growing area of controlled and tunable transport and separation of biomolecules and drugs has recently attracted attention to the structures which can be referred to as stimuli-responsive porous hydrogel thin films. Because of spatial constraints, swelling/shrinking of the hydrogel films results in closing/opening (or vice versa) of the film's pores. Such responsive systems can be used in the configuration of plane films or capsules. The combination of a low thickness (translating into a low hydrodynamic flow resistance and rapid response) with well-defined size and shape of pores (translating into better control of transport and separation), which can be closed, opened, or tuned by an external signal (allowing a large amplitude of changes in diffusivity of solutes in the thin film and a precise control of the pore size), makes these materials very attractive for a range of applications, such as molecular filtration, separation, drug delivery, sensors, and actuators.
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Affiliation(s)
- Ihor Tokarev
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY 13699-5810, USA
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Construction and in vitro characterization of an optimized porosity-enabled amalgamated matrix for sustained transbuccal drug delivery. Int J Pharm 2010; 391:79-89. [DOI: 10.1016/j.ijpharm.2010.02.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2009] [Revised: 02/10/2010] [Accepted: 02/11/2010] [Indexed: 11/23/2022]
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Shaikh RP, Pillay V, Choonara YE, du Toit LC, Ndesendo VMK, Bawa P, Cooppan S. A review of multi-responsive membranous systems for rate-modulated drug delivery. AAPS PharmSciTech 2010; 11:441-59. [PMID: 20300895 DOI: 10.1208/s12249-010-9403-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Accepted: 02/19/2010] [Indexed: 11/30/2022] Open
Abstract
Membrane technology is broadly applied in the medical field. The ability of membranous systems to effectively control the movement of chemical entities is pivotal to their significant potential for use in both drug delivery and surgical/medical applications. An alteration in the physical properties of a polymer in response to a change in environmental conditions is a behavior that can be utilized to prepare 'smart' drug delivery systems. Stimuli-responsive or 'smart' polymers are polymers that upon exposure to small changes in the environment undergo rapid changes in their microstructure. A stimulus, such as a change in pH or temperature, thus serves as a trigger for the release of drug from membranous drug delivery systems that are formulated from stimuli-responsive polymers. This article has sought to review the use of stimuli-responsive polymers that have found application in membranous drug delivery systems. Polymers responsive to pH and temperature have been extensively addressed in this review since they are considered the most important stimuli that may be exploited for use in drug delivery, and biomedical applications such as in tissue engineering. In addition, dual-responsive and glucose-responsive membranes have been also addressed as membranes responsive to diverse stimuli.
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Kolawole OA, Pillay V, Choonara YE, du Toit LC, Ndesendo VMK. The influence of polyamide 6,10 synthesis variables on the physicochemical characteristics and drug release kinetics from a monolithic tablet matrix. Pharm Dev Technol 2009; 15:595-612. [PMID: 19922163 DOI: 10.3109/10837450903397560] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study investigated the influence of solute-solvent quotients on the physicochemical properties and release kinetics of two amitryptyline-loaded polyamide 6,10 (PA 6,10) monolithic matrices, Formulations A and B (FA and FB). The molecular mass, crystallinity, structural elucidation and thermo-transitions were assessed using mass spectrophotometry, X-ray diffraction, FTIR and DSC. Surface morphologies of the matrices and physicomechanical strength were captured using SEM and textural analysis. Drug release, distension and matrix erosion were evaluated using mathematical modeling. FA and FB displayed overall drug release fractions of 0.58 and 0.92 with 55% and 30% of matrix remaining over 24 hours, respectively. The indentation diameters (FA = 1.51 mm; FB = 2.39 mm), deformation energies (FA = 0.02 J; FB = 0.03 J) and Brinell Hardness Numbers (FA = 17.88 N/mm²; FB = 14.45 N/mm²) were divergent. SEM revealed irregular matrix surfaces with varying pore distributions. Minimal shifts in the structural backbone of PA 6,10 and semi-crystallinity was noted. Multiple reversible and irreversible thermal transitions with molar masses of FA = 345.2 g/mol and FB = 307.2 g/mol were obtained. Drug release supported by in vivo studies provided sustained plasma levels of amitryptyline (T(max) = 24 ± 0.5 h and 12 ± 0.5 h; C(max) = 0.024 ± 0.003 μg/mL and 0.036 ± 0.002 μg/mL for FA and FB, respectively) compared to a conventional formulation, Trepiline® (T(max) = 4 ± 0.5 h and C(max) = 0.05 ± 0.002 μg/mL). The physicochemical properties of both formulations were reversibly influenced by differences in the PA 6,10 solute-solvent quotient employed during development.
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Affiliation(s)
- Oluwatoyin A Kolawole
- Department of Pharmacy and Pharmacology, University of the Witwatersrand, Johannesburg, South Africa
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Fujita Y, Mie M, Kobatake E. Construction of nanoscale protein particle using temperature-sensitive elastin-like peptide and polyaspartic acid chain. Biomaterials 2009; 30:3450-7. [DOI: 10.1016/j.biomaterials.2009.03.012] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Accepted: 03/04/2009] [Indexed: 11/26/2022]
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30
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Chen YC, Xie R, Yang M, Li PF, Zhu XL, Chu LY. Gating Characteristics of Thermo-Responsive Membranes with Grafted Linear and Crosslinked Poly(N-isopropylacrylamide) Gates. Chem Eng Technol 2009. [DOI: 10.1002/ceat.200800354] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Qi W, Yan X, Duan L, Cui Y, Yang Y, Li J. Glucose-Sensitive Microcapsules from Glutaraldehyde Cross-Linked Hemoglobin and Glucose Oxidase. Biomacromolecules 2009; 10:1212-6. [DOI: 10.1021/bm801502r] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Wei Qi
- Beijing National Laboratory for Molecular Science, International Joint Laboratory, CAS Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, Max Planck Institute of Colloids and Interfaces, Golm/Potsdam, D-14476, Germany, Northwest Institute of Nuclear Technology, Xi’an 710024, China, and National Center for Nanoscience and Technology, Beijing 100190, China
| | - Xuehai Yan
- Beijing National Laboratory for Molecular Science, International Joint Laboratory, CAS Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, Max Planck Institute of Colloids and Interfaces, Golm/Potsdam, D-14476, Germany, Northwest Institute of Nuclear Technology, Xi’an 710024, China, and National Center for Nanoscience and Technology, Beijing 100190, China
| | - Li Duan
- Beijing National Laboratory for Molecular Science, International Joint Laboratory, CAS Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, Max Planck Institute of Colloids and Interfaces, Golm/Potsdam, D-14476, Germany, Northwest Institute of Nuclear Technology, Xi’an 710024, China, and National Center for Nanoscience and Technology, Beijing 100190, China
| | - Yue Cui
- Beijing National Laboratory for Molecular Science, International Joint Laboratory, CAS Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, Max Planck Institute of Colloids and Interfaces, Golm/Potsdam, D-14476, Germany, Northwest Institute of Nuclear Technology, Xi’an 710024, China, and National Center for Nanoscience and Technology, Beijing 100190, China
| | - Yang Yang
- Beijing National Laboratory for Molecular Science, International Joint Laboratory, CAS Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, Max Planck Institute of Colloids and Interfaces, Golm/Potsdam, D-14476, Germany, Northwest Institute of Nuclear Technology, Xi’an 710024, China, and National Center for Nanoscience and Technology, Beijing 100190, China
| | - Junbai Li
- Beijing National Laboratory for Molecular Science, International Joint Laboratory, CAS Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, Max Planck Institute of Colloids and Interfaces, Golm/Potsdam, D-14476, Germany, Northwest Institute of Nuclear Technology, Xi’an 710024, China, and National Center for Nanoscience and Technology, Beijing 100190, China
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Kim S, Kim JH, Jeon O, Kwon IC, Park K. Engineered polymers for advanced drug delivery. Eur J Pharm Biopharm 2009; 71:420-30. [PMID: 18977434 PMCID: PMC2794279 DOI: 10.1016/j.ejpb.2008.09.021] [Citation(s) in RCA: 251] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2007] [Revised: 07/19/2008] [Accepted: 09/02/2008] [Indexed: 12/11/2022]
Abstract
Engineered polymers have been utilized for developing advanced drug delivery systems. The development of such polymers has caused advances in polymer chemistry, which, in turn, has resulted in smart polymers that can respond to changes in environmental condition such as temperature, pH, and biomolecules. The responses vary widely from swelling/deswelling to degradation. Drug-polymer conjugates and drug-containing nano/micro-particles have been used for drug targeting. Engineered polymers and polymeric systems have also been used in new areas, such as molecular imaging as well as in nanotechnology. This review examines the engineered polymers that have been used as traditional drug delivery systems and as more recent applications in nanotechnology.
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Affiliation(s)
- Sungwon Kim
- Department of Pharmaceutics and Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Jong-Ho Kim
- Department of Pharmaceutics and Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Oju Jeon
- Department of Pharmaceutics and Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Ick Chan Kwon
- Biomedical Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
| | - Kinam Park
- Department of Pharmaceutics and Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
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Xie R, Zhang SB, Wang HD, Yang M, Li PF, Zhu XL, Chu LY. Temperature-dependent molecular-recognizable membranes based on poly(N-isopropylacrylamide) and β-cyclodextrin. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2008.10.039] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Glucose-sensitive liposomes incorporating hydrophobically modified glucose oxidase. Lipids 2008; 43:937-43. [PMID: 18751750 DOI: 10.1007/s11745-008-3223-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2008] [Accepted: 08/04/2008] [Indexed: 11/27/2022]
Abstract
Glucose-sensitive liposomes were prepared by incorporating hydrophobically modified glucose oxidase (EC 1.1.3.4.) into the liposomal bilayer of dioleoylphosphatidylethanolamine and cholesteryl hemisuccinate. For the release test, calcein, a fluorescence marker, was entrapped in the liposomes. The liposomes were stable under neutral conditions in terms of calcein release but an extensive release was observed under acidic conditions. In the experiment of glucose concentration-dependent calcein release, no release was observed for 180 min when the suspension of liposome was free of glucose. With a glucose concentration of 50 mg/dL, no appreciable amount of calcein was released for the first 20 min, and then the release rate was accelerated. At 200 mg/dL glucose concentration which is diagnostic and indicative for insulin-dependent diabetes, the lag time of calcein release became shorter and a faster response was obtained. When glucose concentration further increased to 400 mg/dL, the calcein release rate and the degree of release in 180 min were almost the same as the values when the glucose concentration was 200 mg/dL. The glucose concentration-dependent release is due to pH change, since the suspension of liposomes became acidic during the release experiments.
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Buonomenna MG, Figoli A, Spezzano I, Morelli R, Drioli E. Combined Emulsion and Phase Inversion Techniques for the Preparation of Catalytic PVDF Microcapsules. J Phys Chem B 2008; 112:11264-9. [DOI: 10.1021/jp804897b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. G. Buonomenna
- ITM-CNR c/o University of Calabria, via P.Bucci 87030 Rende (CS), Italy
| | - A. Figoli
- ITM-CNR c/o University of Calabria, via P.Bucci 87030 Rende (CS), Italy
| | - I. Spezzano
- ITM-CNR c/o University of Calabria, via P.Bucci 87030 Rende (CS), Italy
| | - R. Morelli
- ITM-CNR c/o University of Calabria, via P.Bucci 87030 Rende (CS), Italy
| | - E. Drioli
- ITM-CNR c/o University of Calabria, via P.Bucci 87030 Rende (CS), Italy
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36
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Poly(N-isopropylacrylamide)-based comb-type grafted hydrogel with rapid response to blood glucose concentration change at physiological temperature. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1079] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Xiang Z, Lu Y, Zou Y, Gong X, Luo G. Preparation of microcapsules containing ionic liquids with a new solvent extraction system. REACT FUNCT POLYM 2008. [DOI: 10.1016/j.reactfunctpolym.2008.06.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Yang M, Chu LY, Xie R, Wang C. Molecular-Recognition-Induced Phase Transitions of Two Thermo-Responsive Polymers with Pendentβ-Cyclodextrin Groups. MACROMOL CHEM PHYS 2008. [DOI: 10.1002/macp.200700359] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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40
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Figoli A, De Luca G, Longavita E, Drioli E. PEEKWC Capsules Prepared by Phase Inversion Technique: A Morphological and Dimensional Study. SEP SCI TECHNOL 2007. [DOI: 10.1080/01496390701558284] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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41
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Effects of ammonium chloride and heat treatment on residual formaldehyde contents of melamine-formaldehyde microcapsules. Colloid Polym Sci 2007. [DOI: 10.1007/s00396-007-1744-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
This review describes recent progresses in the development and applications of smart polymeric gels, especially in the context of biomedical devices. The review has been organized into three separate sections: defining the basis of smart properties in polymeric gels; describing representative stimuli to which these gels respond; and illustrating a sample application area, namely, microfluidics. One of the major limitations in the use of hydrogels in stimuli-responsive applications is the diffusion rate limited transduction of signals. This can be obviated by engineering interconnected pores in the polymer structure to form capillary networks in the matrix and by downscaling the size of hydrogels to significantly decrease diffusion paths. Reducing the lag time in the induction of smart responses can be highly useful in biomedical devices, such as sensors and actuators. This review also describes molecular imprinting techniques to fabricate hydrogels for specific molecular recognition of target analytes. Additionally, it describes the significant advances in bottom-up nanofabrication strategies, involving supramolecular chemistry. Learning to assemble supramolecular structures from nature has led to the rapid prototyping of functional supramolecular devices. In essence, the barriers in the current performance potential of biomedical devices can be lowered or removed by the rapid convergence of interdisciplinary technologies.
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Affiliation(s)
- Somali Chaterji
- Weldon School of Biomedical Engineering Purdue University, 206 S. Intramural Drive, West Lafayette, IN 47907
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43
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Hu L, Chu LY, Yang M, Yu J, Wang HD. A Composite Thermo-Responsive Membrane System for Improved Controlled-Release. Chem Eng Technol 2007. [DOI: 10.1002/ceat.200600307] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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44
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Xie R, Li Y, Chu LY. Preparation of thermo-responsive gating membranes with controllable response temperature. J Memb Sci 2007. [DOI: 10.1016/j.memsci.2006.11.040] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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45
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Jain S, Amit K, Chalasani K, Jain A, Chourasia M, Jain A, Jain N. Enzyme triggered pH sensitive liposomes for insulin delivery. J Drug Deliv Sci Technol 2007. [DOI: 10.1016/s1773-2247(07)50080-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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46
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Wang GJ, Chu LY, Zhou MY, Chen WM. Effects of preparation conditions on the microstructure of porous microcapsule membranes with straight open pores. J Memb Sci 2006. [DOI: 10.1016/j.memsci.2006.07.048] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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Li PF, Ju XJ, Chu LY, Xie R. Thermo-Responsive Membranes with Cross-linked Poly(N-Isopropyl-acrylamide) Hydrogels inside Porous Substrates. Chem Eng Technol 2006. [DOI: 10.1002/ceat.200600174] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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48
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De Geest BG, Jonas AM, Demeester J, De Smedt SC. Glucose-responsive polyelectrolyte capsules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:5070-4. [PMID: 16700596 DOI: 10.1021/la053368o] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Phenylboronic acids are known to form covalent complexes with polyol compounds such as glucose. A novel polyelectrolyte, containing phenylboronic acid as a glucose-sensitive moiety, has been synthesized and used for the fabrication of glucose-sensitive hollow polyelectrolyte capsules using the layer-by-layer technique. The response to glucose was observed as a rather fast dissolution of the capsules when brought into contact with a glucose-containing medium. These polyelectrolyte capsules are the first polyelectrolyte capsules able to respond to a stimulus that can be provided by the human body (i.e., an increase in glucose concentration). Therefore, the concept we present has promising applications in the biomedical field for the controlled delivery of insulin.
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Affiliation(s)
- Bruno G De Geest
- Laboratory of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
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Yang M, Chu LY, Li Y, Zhao XJ, Song H, Chen WM. Thermo-Responsive Gating Characteristics of Poly(N-isopropylacrylamide)-Grafted Membranes. Chem Eng Technol 2006. [DOI: 10.1002/ceat.200500300] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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