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Feng P, Bai X, Ma X, Kong H, Yang R. Interfacial-engineered living drugs with "ON/OFF" switching for oral delivery. NANOSCALE 2024; 16:13399-13406. [PMID: 38953700 DOI: 10.1039/d4nr01927j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Living drugs offer a new frontier in medicine, paving the way for personalized and potentially curative treatments. A customized living drug generally requires specialized technologies for highly effective and selective delivery to lesion locations. In this study, we explored an interfacial engineering method for living drugs by wrapping them with a "stealth coating", achieving "ON/OFF" switching of the communications between probiotics and the gastrointesinal (GI) tract. This maximized the bioactivity of living drugs following oral administration to exempt acidic insults and then significantly improved the retention through the gastrointestinal tract. With the notable ability to improve oral availability, the interfacial-engineered living drugs represent remarkable effects for enhanced oral delivery and treatment efficacy in the dextran sulfate sodium (DSS)-induced acute colitis model. We believe that this work has the potential to revolutionize medicine by precisely targeting and increasing curative activity in the future of disease treatment.
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Affiliation(s)
- Pingping Feng
- College of Chemistry and Molecular Engineering, Peking University, Beijing, No. 292 Chengfu Road, Haidian District, Beijing, 100871 P. R. China.
| | - Xuefei Bai
- College of Chemistry, Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian District, Beijing 100875, P. R. China.
| | - Xiaofei Ma
- College of Chemistry, Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian District, Beijing 100875, P. R. China.
| | - Han Kong
- College of Chemistry, Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian District, Beijing 100875, P. R. China.
| | - Rui Yang
- College of Chemistry, Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian District, Beijing 100875, P. R. China.
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2
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Ye Q, Ding M, Zhang P, Wu P, Wang Y, Selomulya C, Chen XD. Visual Monitoring of Disintegration of Solid Oral Dosage Forms in Simulated Gastric Fluids Using Low-Field NMR Imaging. AAPS PharmSciTech 2022; 23:246. [PMID: 36050431 DOI: 10.1208/s12249-022-02401-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 08/18/2022] [Indexed: 11/30/2022] Open
Abstract
Compared to traditional drug release monitoring with manual sampling and testing procedures, low-field nuclear magnetic resonance (LF-NMR) imaging is a one-step, visual, non-destructive, and non-invasive measurement method. Here, we reported the application of LF-NMR to image the morphology, component, sub-diffusion, and spatial distribution of a solid oral formulation, Biyankang tablets, during dissolution in vitro. The drug ingredients with characteristic relaxation times were distinguished and localized based on the signal of standards, such as patchouli oil, Xanthium strumarium extract, and starch. The hydration, swelling, disintegration, and sub-diffusion of tablets in simulated gastric fluids (SGF) were visualized statically. All tablets showed similar expansion (37.4-42.0%) along the direction of thickness at 25 min and reached a full disintegration at 145 min, at pH 1.80-6.15, indicating pH-independent swelling and disintegration. Compared to that static immersion within 20 mL SGF, the tablet disintegration time was shortened by ~ 11% in 30 mL SGF. The application of shear reduced the time by ~ 28%, suggesting a major role of hydrodynamic condition in tablet dissolution. The ability to simultaneously visualize, distinguish, and localize drug ingredients using LF-NMR is expected to provide valuable information to develop drug release monitoring systems in vitro and potentially in vivo using small animal studies.
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Affiliation(s)
- Qianyu Ye
- The Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.,School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Meilai Ding
- The Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Ping Zhang
- The Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Peng Wu
- The Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
| | - Yong Wang
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Cordelia Selomulya
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Xiao Dong Chen
- The Life Quality Engineering Interest Group, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
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3
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Pooresmaeil M, Namazi H. Developments on carboxymethyl starch-based smart systems as promising drug carriers: A review. Carbohydr Polym 2021; 258:117654. [DOI: 10.1016/j.carbpol.2021.117654] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/06/2021] [Accepted: 01/11/2021] [Indexed: 12/15/2022]
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4
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Wu X, Zhang M, Sun Y, Bhandari B, Fan D. Effects of cryoprotectants on
Nostoc sphaeroides
superchilled at low temperature (−3.0°C) and their action mechanisms. J FOOD PROCESS ENG 2020. [DOI: 10.1111/jfpe.13488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao‐Fei Wu
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi Jiangsu China
- Yechun Food Production and Distribution Co., Ltd. Yangzhou Jiangsu China
| | - Min Zhang
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi Jiangsu China
- International Joint Laboratory on Food Safety Jiangnan University Wuxi Jiangsu China
| | - Yanan Sun
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi Jiangsu China
- Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan University Wuxi Jiangsu China
| | - Bhesh Bhandari
- School of Agriculture and Food Sciences University of Queensland Brisbane Queensland Australia
| | - Dongcui Fan
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi Jiangsu China
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5
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Gong HR, Ren FD, Zhao LX, Cao DL, Wang JL. Hydration and swelling: a theoretical investigation on the cooperativity effect of H-bonding interactions between p-hydroxy hydroxymethyl calix[4]/[5]arene and H 2O by many-body interaction and density functional reactivity theory. J Mol Model 2020; 26:190. [PMID: 32613574 DOI: 10.1007/s00894-020-04442-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/10/2020] [Indexed: 11/28/2022]
Abstract
In order to explore the nature of the hydration and swelling of superabsorbent resin, a theoretical investigation into the cooperativity effect of the H-bonding interactions in the hydrates of four model compounds that can be regarded as the units of hydroquinone formaldehyde resin (HFR) (i.e., O-hydroxymethyl-1,4-dihydroxybenzene, methylene di-O-hydroxymethyl-1,4-dihydroxybenzene, p-hydroxy hydroxymethyl calix[4]arene and p-hydroxy hydroxymethyl calix[5]arene) was carried out by many-body interaction and density functional reactivity theory. The HFR···H2O···H2O complexes, in which the H2O···H2O moieties are bound with both the hydroxyl groups of HFR, are the most stable. For the HFR(H2O)n clusters, the interaction energy per building block is increased as the number of the size n increases, indicating the cooperativity effect. Therefore, a deduction is given that the cooperativity effects of the H-bonding interactions play an important role in the process of the hydration and swelling of HFR, and the swelling behavior is mainly attributed to the cooperativity effects which arised from the interactions between the H2O molecules. The origin of the cooperativity effect was examined employing several information-theoretic quantities in the density functional reactivity theory. The degree of swelling of HFR was quantitated using a measure of volume. Graphical abstract.
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Affiliation(s)
- Hui-Ru Gong
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Fu-de Ren
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China.
| | - Lin-Xiu Zhao
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Duan-Lin Cao
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Jian-Long Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
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6
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Labelle M, Ispas‐Szabo P, Mateescu MA. Structure‐Functions Relationship of Modified Starches for Pharmaceutical and Biomedical Applications. STARCH-STARKE 2020. [DOI: 10.1002/star.202000002] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Marc‐André Labelle
- Department of Chemistry, Research Chair on Enteric Dysfunctions ‘Allerdys’, CERMO‐FC CenterUniversité du Québec à Montréal C.P. 8888 Montréal QC H3C 3P8 Canada
| | - Pompilia Ispas‐Szabo
- Department of Chemistry, Research Chair on Enteric Dysfunctions ‘Allerdys’, CERMO‐FC CenterUniversité du Québec à Montréal C.P. 8888 Montréal QC H3C 3P8 Canada
| | - Mircea Alexandru Mateescu
- Department of Chemistry, Research Chair on Enteric Dysfunctions ‘Allerdys’, CERMO‐FC CenterUniversité du Québec à Montréal C.P. 8888 Montréal QC H3C 3P8 Canada
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7
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JIN L, Qi H, Gu X, Zhang X, ZHANG Y, Zhang X, Mao S. Effect of Sodium Alginate Type on Drug Release from Chitosan-Sodium Alginate-Based In Situ Film-Forming Tablets. AAPS PharmSciTech 2020; 21:55. [PMID: 31907709 DOI: 10.1208/s12249-019-1549-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 09/23/2019] [Indexed: 11/30/2022] Open
Abstract
Natural polymers are promising as the carrier of matrix-based sustained release tablets but limited by their diversity in source and structure properties. Our previous studies found that chitosan (CS)- and alginate (SA)-based tablets can form self-assembled polyelectrolyte complex (PEC) film on the surface, which controlled drug release with a novel mechanism. To elucidate whether PEC-based sustained drug delivery system could weaken the influence of single-matrix material diversity on drug release behavior, taking theophylline as a drug model, the effect of SA structure properties, including viscosity, G/M ratio, SA salt type, and degree of esterification on drug release profiles, swelling, and erosion of CS-SA composite system was investigated. The results showed that the viscosity, G content, salt type, and esterification degree of SA had a remarkable influence on drug release when SA alone was used as a matrix, but little effect of these parameters on drug release was observed in CS-SA combination system. SA of low viscosity is superior in controlling drug release from CS-SA combination system. Potassium, magnesium salt of SA, and esterified SA can help form PEC of higher thickness with different swelling and erosion extent. In conclusion, this study demonstrated that drug release diversity due to SA structure difference can be well eradicated by using CS-SA combination system, which is a promising strategy to manufacture natural polymer-based products with constant quality.
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8
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Novel Fe3O4 chitosan–quince-seed mucilage polymeric composite to enhance protein release. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00967-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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Doxorubicin loaded carboxymethyl Assam bora rice starch coated superparamagnetic iron oxide nanoparticles as potential antitumor cargo. Heliyon 2019; 5:e01955. [PMID: 31294107 PMCID: PMC6595192 DOI: 10.1016/j.heliyon.2019.e01955] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 04/30/2019] [Accepted: 06/12/2019] [Indexed: 02/06/2023] Open
Abstract
In recent years, polysaccharide-decorated superparamagnetic iron oxide nanoparticles (SPIONs) have gained attention in the field of “nanotheranostics” with integrated diagnostic and therapeutic functions. Carboxymethyl Assam bora rice starch-stabilized SPIONs (CM-ABRS SPIONs), synthesized by co-precipitation method, has already shown exciting potential towards magnetic drug targeting potential. After establishing it as a promisable targeting carrier, the present study is focused on the next step i.e. to evaluate its In vitro anti-tumor potential by loading anticancer drug “Doxorubicin hydrochloride (DOX)” onto CM-ABRS SPIONs. DOX-loaded CM-ABRS SPIONs were physico-chemically characterized by DLS, zeta-potential, TEM, FT-IR, XRD, and VSM analysis. Spectroflourimetric analysis confirmed the maximum loading of DOX up to 6% (w/w) onto CM-ABRS SPIONs via electrostatic interactions. Further, molecular level drug performance was investigated by docking study against receptors (HER-2 and Folate receptor-α) over expressed in cancer cells and MTT assay (in MCF-7 and HeLa cell line), which conferred promisable results of DOX-CM-ABRS SPIONs as compared to standard DOX solution.
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10
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Rostamabadi H, Falsafi SR, Jafari SM. Starch-based nanocarriers as cutting-edge natural cargos for nutraceutical delivery. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.04.004] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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11
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Mittal H, Ray SS, Kaith BS, Bhatia JK, Sukriti, Sharma J, Alhassan SM. Recent progress in the structural modification of chitosan for applications in diversified biomedical fields. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.10.013] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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12
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Zhang X, Gu X, Wang X, Wang H, Mao S. Tunable and sustained-release characteristics of venlafaxine hydrochloride from chitosan-carbomer matrix tablets based on in situ formed polyelectrolyte complex film coating. Asian J Pharm Sci 2018; 13:566-574. [PMID: 32104430 PMCID: PMC7032170 DOI: 10.1016/j.ajps.2018.01.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/09/2018] [Indexed: 11/28/2022] Open
Abstract
The objective of this study is to design sustained-release tablets using matrix technology, which can well control the release of highly water-soluble drugs with good system robustness and simple preparation process. Taking venlafaxine hydrochloride (VH) as a drug model, the feasibility of using chitosan (CS), carbomer (CBM) combination system to achieve this goal was studied. Formulation and process variables influencing drug release from CS-CBM matrix tablets were investigated. It was found that CS-CBM combination system weakened the potential influence of CS, CBM material properties and gastric emptying time on drug release profile. Demonstrated by direct observation, differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR), in situ self-assembled polyelectrolyte complex (PEC) film was formed on the tablet surface during gastrointestinal tract transition, which contributed to the tunable and robust control of drug release. The sustained drug release behavior was further demonstrated in vivo in Beagle dogs, with level A in vitro and in vivo correlation (IVIVC) established successfully. In conclusion, CS-CBM matrix tablets are promising system to tune and control the release of highly water-soluble drugs with good system robustness.
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Affiliation(s)
- Xiaofei Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiangqin Gu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiaodan Wang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Huimin Wang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Shirui Mao
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
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13
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14
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Chitosan-clay matrix tablets for sustained-release drug delivery: Effect of chitosan molecular weight and lubricant. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2016.08.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Evaluation of the stability of pea and canola protein-based hydrogels in simulated gastrointestinal fluids. J FOOD ENG 2015. [DOI: 10.1016/j.jfoodeng.2015.04.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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16
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Li L, Li J, Si S, Wang L, Shi C, Sun Y, Liang Z, Mao S. Effect of formulation variables on in vitro release of a water-soluble drug from chitosan–sodium alginate matrix tablets. Asian J Pharm Sci 2015. [DOI: 10.1016/j.ajps.2014.09.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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17
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1H Nuclear Magnetic Resonance Relaxometry and Magnetic Resonance Imaging and Applications in Food Science and Processing. FOOD ENGINEERING REVIEWS 2015. [DOI: 10.1007/s12393-015-9118-y] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Liu G, Hong Y, Gu Z, Li Z, Cheng L, Li C. Preparation and characterization of pullulanase debranched starches and their properties for drug controlled-release. RSC Adv 2015. [DOI: 10.1039/c5ra18701j] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Linear short amylose and glucan tend to align and aggregate to form hydrogels that hold less water. The drug release properties of debranched starch based tablets can be controlled by the pullulanase modification conditions.
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Affiliation(s)
- Guodong Liu
- The State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi-214122
- P. R. China
- School of Food Science and Technology
| | - Yan Hong
- The State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi-214122
- P. R. China
- School of Food Science and Technology
| | - Zhengbiao Gu
- The State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi-214122
- P. R. China
- School of Food Science and Technology
| | - Zhaofeng Li
- The State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi-214122
- P. R. China
- School of Food Science and Technology
| | - Li Cheng
- The State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi-214122
- P. R. China
- School of Food Science and Technology
| | - Caiming Li
- The State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi-214122
- P. R. China
- School of Food Science and Technology
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19
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Li L, Wang L, Li J, Jiang S, Wang Y, Zhang X, Ding J, Yu T, Mao S. Insights into the mechanisms of chitosan–anionic polymers-based matrix tablets for extended drug release. Int J Pharm 2014; 476:253-65. [DOI: 10.1016/j.ijpharm.2014.09.057] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 09/26/2014] [Accepted: 09/30/2014] [Indexed: 10/24/2022]
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20
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Marcone MF, Wang S, Albabish W, Nie S, Somnarain D, Hill A. Diverse food-based applications of nuclear magnetic resonance (NMR) technology. Food Res Int 2013. [DOI: 10.1016/j.foodres.2012.12.046] [Citation(s) in RCA: 208] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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21
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Mihaela Friciu M, Canh Le T, Ispas-Szabo P, Mateescu MA. Carboxymethyl starch and lecithin complex as matrix for targeted drug delivery: I. Monolithic mesalamine forms for colon delivery. Eur J Pharm Biopharm 2013; 85:521-30. [PMID: 23562535 DOI: 10.1016/j.ejpb.2013.03.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 03/03/2013] [Accepted: 03/06/2013] [Indexed: 01/31/2023]
Abstract
For drugs expected to act locally in the colon, and for successful treatment, a delivery device is necessary, in order to limit the systemic absorption which decreases effectiveness and causes important side effects. Various delayed release systems are currently commercialized; most of them based on pH-dependent release which is sensitive to gastrointestinal pH variation. This study proposes a novel excipient for colon delivery. This new preparation consists in the complexation between carboxymethyl starch (CMS) and Lecithin (L). As opposed to existing excipients, the new complex is pH-independent, inexpensive, and easy to manufacture and allows a high drug loading. FTIR, X-ray, and SEM structural analysis all support the hypothesis of the formation of a complex. By minor variation of the excipient content within the tablet, it is possible to modulate the release time and delivery at specific sites of the gastrointestinal tract. This study opens the door to a new pH-independent delivery system for mesalamine targeted administration. Our novel formulation fits well with the posology of mesalamine, used in the treatment of Inflammatory Bowel Disease (IBD), which requires repeated administrations (1g orally four times a day) to maintain a good quality of life.
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22
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Xia B, Wang X, He F, Cui Q, Li L. Self-assembly of conjugated polymer on hybrid nanospheres for cellular imaging applications. ACS APPLIED MATERIALS & INTERFACES 2012; 4:6332-6337. [PMID: 23101490 DOI: 10.1021/am301945k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new kind of hybrid core-shell nanosphere was fabricated by combining the in situ formation of Au nanoparticles and covalent cross-linking of biocompatible carboxymethyl starch dialdehyde (CMSD) and chitosan (CTS). When the fluorescent dye poly[9,9'-bis(6″-(N,N,N-trimethylammonium)-hexyl)fluorene-2,7-ylenevinylene-co-alt-1,4-phenylene dibromide] (PFV) was assembled on the surface of the hybrid nanospheres through electrostatic attraction, these biocompatible hybrid nanospheres exhibited metal-enhanced fluorescence effects. The fluorescence intensity of (CTS-Au)@CMSD/PFV hybrid nanosphere is 1.43 times that of CTS-CMSD/PFV hybrid nanospheres lacking Au nanoparticle. In addition, the (CTS-Au)@CMSD/PFV hybrid nanospheres exhibit excellent biodegradability upon exposure to enzymatic aqueous solution and good biocompatibility when cocultured with HeLa cervical carcinoma cells; these advantages make them attractive for cellular imaging and biological analysis and detection.
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Affiliation(s)
- Bihua Xia
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
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23
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Calinescu C, Mondovi B, Federico R, Ispas-Szabo P, Mateescu MA. Carboxymethyl starch: Chitosan monolithic matrices containing diamine oxidase and catalase for intestinal delivery. Int J Pharm 2012; 428:48-56. [PMID: 22402476 DOI: 10.1016/j.ijpharm.2012.02.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 01/31/2012] [Accepted: 02/20/2012] [Indexed: 10/28/2022]
Abstract
The capacity of carboxymethyl starch (CMS):Chitosan monolithic tablets to protect diamine oxidase and/or catalase therapeutic enzymes against simulated gastric fluid (SGF) and to control their delivery in simulated intestinal fluid (SIF) was investigated. Enzyme formulations loaded with grass pea seedlings diamine oxidase (PSDAO) vegetal extract, catalase, or PSDAO associated to catalase, were obtained by direct compression. The CMS:Chitosan (1:1) matrix afforded a good gastric protection to PSDAO and to catalase, when each enzyme was formulated separately. Variable amounts of DAO were delivered in the SIF containing pancreatin, with maximal release reached at about 8h, a time convenient for tablets to attain the colon. Up to 50% of the initial enzymatic activity of catalase formulated with CMS:Chitosan was found after 8 h in SIF. For the CMS:Chitosan tablets of bi-enzymatic formulations containing PSDAO:Catalase, the releases of DAO and of catalase were synchronized. The hydrogen peroxide (product of DAO activity) was decomposed by the catalase liberated in the same SIF environment. The proposed formulations could allow novel therapeutic approaches for the treatment of inflammatory bowel diseases, intestinal cancers or pseudo-allergic reactions.
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Affiliation(s)
- Carmen Calinescu
- Department of Chemistry and Centre Pharmaqam, Université du Québec à Montréal, CP 8888, Succ. A, Montréal (Québec) H3C 3P8, Canada
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24
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Dorożyński PP, Kulinowski P, Młynarczyk A, Stanisz GJ. MRI as a tool for evaluation of oral controlled release dosage forms. Drug Discov Today 2011; 17:110-23. [PMID: 22094243 DOI: 10.1016/j.drudis.2011.10.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Revised: 09/24/2011] [Accepted: 10/31/2011] [Indexed: 11/25/2022]
Abstract
The magnetic resonance imaging (MRI) studies of controlled-release (CR) dosage forms can be roughly divided into two groups. The first comprises studies performed in static conditions (small solvent volumes and ambient temperature). Such studies have provided insight into molecular phenomena in hydrating polymeric matrices. The second group covers research performed in dynamic conditions (medium flow or stirring) related to drug dissolution. An important issue is supplementation of the MRI results with data obtained by complementary techniques, such as X-ray microtomography (μCT). As we discuss here, an understanding of the mechanism underlying the release of the drug from the dosage form will lead to the development of detailed, molecularly defined, CR dosage forms.
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Affiliation(s)
- Przemysław P Dorożyński
- Department of Pharmaceutical Technology and Biopharmaceutics, Pharmaceutical Faculty, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Kraków, Poland.
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