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Mujahid K, Rana I, Suliman IH, Li Z, Wu J, He H, Nam J. Biomaterial-Based Sustained-Release Drug Formulations for Localized Cancer Immunotherapy. ACS APPLIED BIO MATERIALS 2023. [PMID: 38050811 DOI: 10.1021/acsabm.3c00808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Cancer immunotherapy has revolutionized clinical cancer treatments by taking advantage of the immune system to selectively and effectively target and kill cancer cells. However, clinical cancer immunotherapy treatments often have limited efficacy and/or present severe adverse effects associated primarily with their systemic administration. Localized immunotherapy has emerged to overcome these limitations by directly targeting accessible tumors via local administration, reducing potential systemic drug distribution that hampers drug efficacy and safety. Sustained-release formulations can prolong drug activity at target sites, which maximizes the benefits of localized immunotherapy to increase the therapeutic window using smaller dosages than those used for systemic injection, avoiding complications of frequent dosing. The performance of sustained-release formulations for localized cancer immunotherapy has been validated preclinically using various implantable and injectable scaffold platforms. This review introduces the sustained-release formulations developed for localized cancer immunotherapy and highlights their biomaterial-based platforms for representative classes, including inorganic scaffolds, natural hydrogels, synthetic hydrogels, and microneedle patches. The design rationale and other considerations are summarized for further development of biomaterials for the construction of optimal sustained-release formulations.
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Affiliation(s)
- Khizra Mujahid
- College of Pharmacy, Chonnam National University, Gwangju 61186, South Korea
| | - Isra Rana
- College of Pharmacy, Chonnam National University, Gwangju 61186, South Korea
| | | | - Zhen Li
- College of Pharmacy, Chonnam National University, Gwangju 61186, South Korea
| | - Jiang Wu
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Huacheng He
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou, Zhejiang 325000, P. R. China
| | - Jutaek Nam
- College of Pharmacy, Chonnam National University, Gwangju 61186, South Korea
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Nayak J, Sood A, Kulharia M, Sahoo SK, Kumar R. Structural Distortion of β-Cyclodextrin Plays a Key Role in the pH-dependent Host-Guest Chemistry with Doxorubicin, Evident by the Electrochemical and Molecular Dynamics Approach. J Chem Inf Model 2023; 63:2975-2982. [PMID: 37133821 DOI: 10.1021/acs.jcim.2c01636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
β-Cyclodextrin (β-CD) is the potential drug carrier to deliver antitumor drugs like doxorubicin (DOX). However, the mechanism for the inclusion complex formation is still unclear and needs to be explored. This study investigated the effect of pH on the inclusion of DOX into thiolated β-CD (β-CD-SH) by electrochemical and molecular dynamics (MD) simulation. The electrochemical study shows a clear difference at different pH values. The redox peak due to the DOX is strongly influenced by pH. At neutral pH, the peak intensity decreases with time, while slight variation is observed at acidic and basic pH, depicting the association of DOX to the β-CD-SH cavity at neutral pH. Also, due to the association, the charge transfer resistance variation increased with time at neutral pH and decreased at basic and acidic pH. The electrochemical study was further supported by MD simulation, suggesting that the cyclodextrin (CD) ring gets slightly elongated due to the flipping of glucose units, specifically at neutral pH leading to a strong association. Also, another significant result observed that the DOX forms an inclusion complex with β-CD-SH in quinol conformation, not in quinone. Briefly, the study provides the necessary molecular binding information for designing an effective β-CD-based targeted drug delivery system.
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Affiliation(s)
- Jyotsnamayee Nayak
- Department of Chemistry, S.V. National Institute of Technology, Surat, Gujarat 395007, India
| | - Ashita Sood
- Centre for Computational Biology and Bioinformatics, School of Life Sciences, Central University of Himachal Pradesh, Kangra, Himachal Pradesh 176215, India
| | - Mahesh Kulharia
- Centre for Computational Biology and Bioinformatics, School of Life Sciences, Central University of Himachal Pradesh, Kangra, Himachal Pradesh 176215, India
| | - Suban K Sahoo
- Department of Chemistry, S.V. National Institute of Technology, Surat, Gujarat 395007, India
| | - Rajender Kumar
- Department of Chemistry and Chemical Science, School of Physical and Material Sciences, Central University of Himachal Pradesh, Kangra, Himachal Pradesh 176215, India
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Bashir M, Syed HK, Asghar S, Irfan M, Almalki WH, Menshawi SA, Khan IU, Shah PA, Khalid I, Ahmad J, Gohar UF, Peh KK, Iqbal MS. Effect of Hydrophilic Polymers on Complexation Efficiency of Cyclodextrins in Enhancing Solubility and Release of Diflunisal. Polymers (Basel) 2020; 12:E1564. [PMID: 32679660 PMCID: PMC7408593 DOI: 10.3390/polym12071564] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/04/2020] [Accepted: 07/07/2020] [Indexed: 02/05/2023] Open
Abstract
The effects of three hydrophilic polymers, namely, carboxymethyl cellulose sodium (CMC-Na), polyvinyl alcohol (PVA) and poloxamer-188 (PXM-188) on the solubility and dissolution of diflunisal (DIF) in complexation with β-cyclodextrin (βCD) or hydroxypropyl β-cyclodextrin (HPβCD), were investigated. The kneading method was used at different drug to cyclodextrin weight ratios. Increases in solubility and drug release were observed with the DIF/βCD and DIF/HPβCD complexes. The addition of hydrophilic polymers at 2.5, 5.0 and 10.0% w/w markedly improved the complexation and solubilizing efficiency of βCD and HPβCD. Fourier-transform infrared (FTIR) showed that DIF was successfully included into the cyclodextrin cavity. Differential scanning calorimetry (DSC) and X-ray diffractometry (XRD) confirmed stronger drug amorphization and entrapment in the molecular cage of cyclodextrins. The addition of PVA, CMC-Na or PXM-188 reduced further the intensity of the DIF endothermic peak. Most of the sharp and intense peaks of DIF disappeared with the addition of hydrophilic polymers. In conclusion, PXM-188 at a weight ratio of 10.0% w/w was the best candidate in enhancing the solubility, stability and release of DIF.
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Affiliation(s)
- Mehreen Bashir
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.B.); (S.A.); (M.I.); (I.U.K.); (I.K.); (J.A.)
| | - Haroon Khalid Syed
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.B.); (S.A.); (M.I.); (I.U.K.); (I.K.); (J.A.)
| | - Sajid Asghar
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.B.); (S.A.); (M.I.); (I.U.K.); (I.K.); (J.A.)
| | - Muhammad Irfan
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.B.); (S.A.); (M.I.); (I.U.K.); (I.K.); (J.A.)
| | - Waleed Hassan Almalki
- Department of Toxicology and Pharmacology, College of Pharmacy, Umm Al Qura University, Makkah 21955, Saudi Arabia;
| | - Salah Ali Menshawi
- Department of Toxicology in Comprehensive Specialized Clinics Security Forces, Jeddah 21442, Saudi Arabia;
| | - Ikram Ullah Khan
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.B.); (S.A.); (M.I.); (I.U.K.); (I.K.); (J.A.)
| | - Pervaiz A. Shah
- University College of Pharmacy, University of the Punjab, Lahore 54590, Pakistan;
| | - Ikrima Khalid
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.B.); (S.A.); (M.I.); (I.U.K.); (I.K.); (J.A.)
| | - Junaid Ahmad
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad 38000, Pakistan; (M.B.); (S.A.); (M.I.); (I.U.K.); (I.K.); (J.A.)
| | - Umar Farooq Gohar
- Institute of Industrial Biotechnology, Government College University, Lahore 54590, Pakistan;
| | - Kok Khiang Peh
- Department of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang 11800, Malaysia
| | - Muhammad Shahid Iqbal
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia;
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Salazar S, Yutronic N, Jara P. Magnetic β-Cyclodextrin Nanosponges for Potential Application in the Removal of the Neonicotinoid Dinotefuran from Wastewater. Int J Mol Sci 2020; 21:ijms21114079. [PMID: 32517363 PMCID: PMC7312724 DOI: 10.3390/ijms21114079] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/23/2020] [Accepted: 06/05/2020] [Indexed: 12/25/2022] Open
Abstract
This article describes the use of β-cyclodextrin-based carbonate nanosponges (NSs) decorated with superparamagnetic Fe3O4 nanoparticles to study and investigate the potential removal of dinotefuran (DTF) from wastewater. The NS-DTF inclusion compound was characterized by transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), UV-visible spectroscopy (UV-VIS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray powder diffraction (XRPD) and proton nuclear magnetic resonance (1H-NMR). The adsorption efficiency of NSs was evaluated as function of different contact times. The results confirmed that the NSs have a favourable sorption capacity for the chosen guest, as the polymers exhibited a maximum adsorption of 4.53 × 10−3 mmol/g for DTF. We also found that magnetic NSs show good reusability as they maintain their efficiency after eight adsorption and desorption cycles. Our studies and characterization by means of SEM, TEM, EDS, vibrating sample magnetometer (VSM) and UV-VIS also show that NSs with magnetic properties are excellent tools for insecticide removal from aqueous environments.
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Affiliation(s)
- Sebastián Salazar
- Correspondence: (S.S.); (P.J.); Tel.: +56-982-171-808 (S.S.); +56-229-787-396 (P.J.); Fax: +56-2271-3888 (P.J.)
| | | | - Paul Jara
- Correspondence: (S.S.); (P.J.); Tel.: +56-982-171-808 (S.S.); +56-229-787-396 (P.J.); Fax: +56-2271-3888 (P.J.)
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Zhou Y, Qiu B, Yin X, Liu H, Zhu L. Concomitant drugs-loaded microcapsules of roxithromycin and theophylline with pH-sensitive controlled-releasing properties. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1596917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- You Zhou
- Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, P.R. China
| | - Bining Qiu
- Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, P.R. China
| | - Xueqiong Yin
- Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, P.R. China
| | - Haifang Liu
- Affiliated Haikou Hospital, Xiangya School of Medicine central south University, Haikou Municipal People’s Hospital, Haikou, Hainan, 570208, P.R. China
| | - Li Zhu
- Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, P.R. China
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Kaur A, Bhoop BS, Chhibber S, Sharma G, Gondil VS, Katare OP. Supramolecular nano-engineered lipidic carriers based on diflunisal-phospholipid complex for transdermal delivery: QbD based optimization, characterization and preclinical investigations for management of rheumatoid arthritis. Int J Pharm 2017; 533:206-224. [DOI: 10.1016/j.ijpharm.2017.09.041] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 09/15/2017] [Accepted: 09/16/2017] [Indexed: 01/05/2023]
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Kamaly N, Yameen B, Wu J, Farokhzad OC. Degradable Controlled-Release Polymers and Polymeric Nanoparticles: Mechanisms of Controlling Drug Release. Chem Rev 2016; 116:2602-63. [PMID: 26854975 PMCID: PMC5509216 DOI: 10.1021/acs.chemrev.5b00346] [Citation(s) in RCA: 1551] [Impact Index Per Article: 193.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Nazila Kamaly
- Laboratory of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Basit Yameen
- Laboratory of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Jun Wu
- Laboratory of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Omid C. Farokhzad
- Laboratory of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Lucio D, Zornoza A, Martínez-Ohárriz MC. Influence of chitosan and carboxymethylchitosan on the polymorphism and solubilisation of diflunisal. Int J Pharm 2014; 467:19-26. [DOI: 10.1016/j.ijpharm.2014.03.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 03/18/2014] [Accepted: 03/19/2014] [Indexed: 10/25/2022]
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Kutyła MJ, Boehm MW, Stokes JR, Shaw PN, Davies NM, McGeary RP, Tuke J, Ross BP. Cyclodextrin-crosslinked poly(acrylic acid): adhesion and controlled release of diflunisal and fluconazole from solid dosage forms. AAPS PharmSciTech 2013; 14:301-11. [PMID: 23307066 PMCID: PMC3581673 DOI: 10.1208/s12249-012-9903-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 11/29/2012] [Indexed: 11/30/2022] Open
Abstract
The controlled release of diflunisal and fluconazole from tablets made of novel polymers, poly(acrylic acid) (PAA) crosslinked with either β-cyclodextrin (βCD) or hydroxypropyl-βCD (HPβCD), was investigated and Carbopol 934P (Carbopol) was used as a highly crosslinked PAA for comparison. Diflunisal strongly associates with βCD-PAA and HPβCD-PAA polymers (Ka of 486 and 6,055 M(-1) respectively); thus, it was physically mixed into the conjugates and also precomplexed to identify whether decomplexation has any influence on release kinetics. Fluconazole has poor complexing ability (Ka of 34 M(-1) with HPβCD-PAA); thus, it was only tested as a physical mixture. Swelling and adhesion studies were conducted on all tablet combinations and adhesivity of the CD-PAA polymer tablets was maintained. Diflunisal release was much slower from HPβCD-PAA tablets than from βCD-PAA, suggesting that a higher degree of complexation retards release. The precomplexed diflunisal release was also slower than the physically mixed diflunisal of the corresponding conjugate. The release closely followed zero-order kinetics for HPβCD-PAA, but was more sigmoidal for βCD-PAA and especially Carbopol. Conversely, poorly associating fluconazole released in almost exactly the same way across both polymers and Carbopol, indicating that the release kinetics of poorly associating drugs are not influenced by the presence of cyclodextrins. In view of the varying profiles and release rates shown with diflunisal for the different polymers, the fluconazole data support the concept that adequate complexation can indeed modulate the release kinetics of drugs.
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Affiliation(s)
- Marguerite J. Kutyła
- />School of Pharmacy, The University of Queensland, Brisbane, QLD 4072 Australia
| | - Michael W. Boehm
- />School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072 Australia
| | - Jason R. Stokes
- />School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072 Australia
| | - P. Nicholas Shaw
- />School of Pharmacy, The University of Queensland, Brisbane, QLD 4072 Australia
| | - Nigel M. Davies
- />School of Pharmacy, The University of Queensland, Brisbane, QLD 4072 Australia
| | - Ross P. McGeary
- />School of Pharmacy, The University of Queensland, Brisbane, QLD 4072 Australia
- />School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072 Australia
| | - Jonathan Tuke
- />School of Mathematical Sciences, University of Adelaide, Adelaide, SA 5005 Australia
| | - Benjamin P. Ross
- />School of Pharmacy, The University of Queensland, Brisbane, QLD 4072 Australia
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Kutyła MJ, Lambert LK, Davies NM, McGeary RP, Shaw PN, Ross BP. Cyclodextrin-crosslinked poly(acrylic acid): Synthesis, physicochemical characterization and controlled release of diflunisal and fluconazole from hydrogels. Int J Pharm 2013; 444:175-84. [DOI: 10.1016/j.ijpharm.2013.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 12/13/2012] [Accepted: 01/02/2013] [Indexed: 10/27/2022]
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Bommana MM, Kirthivasan B, Shikhar A, Gupta SS, Squillante E. In vivo brain microdialysis as a formulation-screening tool for a poorly soluble centrally acting drug. Drug Dev Ind Pharm 2013; 40:74-9. [PMID: 23298323 DOI: 10.3109/03639045.2012.746361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Efficacy of a formulation of a poorly soluble centrally acting drug was evaluated by measuring dopamine responses using in vivo brain microdialysis. METHODS Co-crystals (1:1) of carbamazepine and nicotinamide (CBZ-NCT) were complexed with cyclodextrins (γ-CDs) using supercritical fluid processing. Phase solubility and intrinsic dissolution were studied. Pharmacodynamic studies were performed on rats divided into three groups getting either CBZ-NCT in CD (20 mg/kg CBZ), pure CBZ solution or vehicle. A guide cannula was implanted to attach the microdialysis probe. Dialysate samples were analyzed for dopamine levels, which were compared between groups. RESULTS The optimized CBZ formulation (5% w/w in γ-CD) with solubility - 10 mg/mL showed stepwise increase in dopamine response (maximum 250% of baseline) compared to neat CBZ or vehicle (p < 0.05). The pharmacokinetics of the drug required 30 min to elicit CNS response, which peaked at about 1.5-2 h. CONCLUSION Hence, brain microdialysis was successfully used to evaluate a dissolution rate enhancing formulation.
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Affiliation(s)
- Murali Mohan Bommana
- Department of Pharmaceutical Sciences, College of Pharmacy and Allied Health Professions, Department of Pharmaceutical Sciences, College of Pharmacy and Allied Health Professions, St. John's University , Jamaica, NY , USA
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Cao QR, Choi JS, Liu Y, Xu WJ, Yang M, Lee BJ, Cui JH. A formulation approach for development of HPMC-based sustained release tablets for tolterodine tartrate with a low release variation. Drug Dev Ind Pharm 2012; 39:1720-30. [DOI: 10.3109/03639045.2012.730528] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Jug M, Kosalec I, Maestrelli F, Mura P. Development of low methoxy amidated pectin-based mucoadhesive patches for buccal delivery of triclosan: effect of cyclodextrin complexation. Carbohydr Polym 2012; 90:1794-803. [PMID: 22944449 DOI: 10.1016/j.carbpol.2012.07.074] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 07/19/2012] [Accepted: 07/29/2012] [Indexed: 10/28/2022]
Abstract
A novel mucoadhesive buccal patch formulation of triclosan (TR), a broad spectrum antibacterial agent, was developed using low methoxy amidated pectin (AMP). The integrity of AMP matrix was improved by addition of 20% (w/w) Carbopol (CAR). The efficiency of β-cyclodextrin-epichlorohydrin polymer (EPIβCD) and anionic carboxymethylated β-cyclodextrin-epichlorohydrin polymer (CMEPIβCD) in optimization of TR solubility and release from such a matrix was investigated and confronted to that of parent β-cyclodextrin (βCD). Loading of TR/βCD co-ground complex into AMP/CAR matrix resulted in a biphasic release profile which was sensitive upon the hydration degree of the matrix, due to lower solubilizing efficiency of βCD, while the drug release from patches loaded with TR/EPIβCD complex was significantly faster with a constant release rate. Microbiological studies evidenced faster onset and more pronounced antibacterial action of TR/EPIβCD loaded patches, clearly demonstrating their good therapeutic potential in eradication of Streptococcus mutans, a cariogenic bacteria, from the oral cavity.
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Affiliation(s)
- Mario Jug
- Department of Pharmaceutics, Faculty of Pharmacy and Biochemistry, University of Zagreb, A. Kovačića 1, Zagreb 10000, Croatia.
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Salústio PJ, Pontes P, Conduto C, Sanches I, Carvalho C, Arrais J, Marques HMC. Advanced technologies for oral controlled release: cyclodextrins for oral controlled release. AAPS PharmSciTech 2011; 12:1276-92. [PMID: 21948320 DOI: 10.1208/s12249-011-9690-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 09/07/2011] [Indexed: 01/01/2023] Open
Abstract
Cyclodextrins (CDs) are used in oral pharmaceutical formulations, by means of inclusion complexes formation, with the following advantages for the drugs: (1) solubility, dissolution rate, stability, and bioavailability enhancement; (2) to modify the drug release site and/or time profile; and (3) to reduce or prevent gastrointestinal side effects and unpleasant smell or taste, to prevent drug-drug or drug-additive interactions, or even to convert oil and liquid drugs into microcrystalline or amorphous powders. A more recent trend focuses on the use of CDs as nanocarriers, a strategy that aims to design versatile delivery systems that can encapsulate drugs with better physicochemical properties for oral delivery. Thus, the aim of this work was to review the applications of the CDs and their hydrophilic derivatives on the solubility enhancement of poorly water-soluble drugs in order to increase their dissolution rate and get immediate release, as well as their ability to control (to prolong or to delay) the release of drugs from solid dosage forms, either as complexes with the hydrophilic (e.g., as osmotic pumps) and/or hydrophobic CDs. New controlled delivery systems based on nanotechnology carriers (nanoparticles and conjugates) have also been reviewed.
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Domi Y, Ikeura K, Okamura K, Shimazu K, Porter MD. Strong inclusion of inorganic anions into β-cyclodextrin immobilized to gold electrode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10580-10586. [PMID: 21728339 DOI: 10.1021/la1051063] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The inclusion of inorganic anions such as SO(4)(2-), NO(3)(-), and HPO(4)(2-) into the cavity of β-cyclodextrin monolayers on Au was examined by X-ray photoelectron spectroscopy (XPS), a quartz crystal microbalance (QCM), and chronocoulometric measurements of the competitive inclusion with ferrocene. The inclusion amounts of ferrocence in 0.2 M Na(2)SO(4), NaNO(3), and Na(2)HPO(4) solutions were less than 6% of the adsorption amount of β-cyclodextrin on Au, resulting in the apparent inhibition of the ferrocene redox reaction. The surface association constants of these anions reached about 10 on a logarithmic scale and were much higher than those for the inclusion of common organic guest compounds. A stronger anion inclusion was also demonstrated by the QCM response corresponding to the replacement of a preincluded organic guest with sulfate upon the injection of the sulfate solution. Quantitative analysis of the XPS data suggested a 1:1 association for each of these anions per surface β-cyclodextrin. There was no detectable inclusion for ClO(4)(-), Cl(-), and Br(-).
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Affiliation(s)
- Yasuhiro Domi
- Division of Environmental Materials Science, Graduate School of Environmental Science, Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
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Fu Y, Kao WJ. Drug release kinetics and transport mechanisms of non-degradable and degradable polymeric delivery systems. Expert Opin Drug Deliv 2010; 7:429-44. [PMID: 20331353 DOI: 10.1517/17425241003602259] [Citation(s) in RCA: 716] [Impact Index Per Article: 51.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
IMPORTANCE OF THE FIELD The advancement in material design and engineering has led to the rapid development of new materials with increasing complexity and functions. Both non-degradable and degradable polymers have found wide applications in the controlled delivery field. Studies on drug release kinetics provide important information into the function of material systems. To elucidate the detailed transport mechanism and the structure-function relationship of a material system, it is critical to bridge the gap between the macroscopic data and the transport behavior at the molecular level. AREAS COVERED IN THIS REVIEW The structure and function information of selected non-degradable and degradable polymers have been collected and summarized from literature published after the 1990s. The release kinetics of selected drug compounds from various material systems is discussed in case studies. Recent progress in the mathematical models based on different transport mechanisms is highlighted. WHAT THE READER WILL GAIN This article aims to provide an overview of structure-function relationships of selected non-degradable and degradable polymers as drug delivery matrices. TAKE HOME MESSAGE Understanding the structure-function relationship of the material system is key to the successful design of a delivery system for a particular application. Moreover, developing complex polymeric matrices requires more robust mathematical models to elucidate the solute transport mechanisms.
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Affiliation(s)
- Yao Fu
- University of Wisconsin-Madison, School of Pharmacy, 777 Highland Avenue, Madison, WI 53705, USA
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Otero-Espinar F, Torres-Labandeira J, Alvarez-Lorenzo C, Blanco-Méndez J. Cyclodextrins in drug delivery systems. J Drug Deliv Sci Technol 2010. [DOI: 10.1016/s1773-2247(10)50046-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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