1
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Sohn JS, Choi JS. Development of a tadalafil transdermal formulation and evaluation of its ability to in vitro transdermal permeate using Strat-M® membrane. Eur J Pharm Sci 2024; 192:106615. [PMID: 37863443 DOI: 10.1016/j.ejps.2023.106615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/23/2023] [Accepted: 10/17/2023] [Indexed: 10/22/2023]
Abstract
Tadalafil (TDF) has low water solubility, high intestinal permeability and belongs to the Biopharmaceutics Classification System (BCS) Class II. Due to high intestinal permeability, only oral administration (tablets) and oral thin film formulations have been developed. Therefore, it is necessary to develop various formulations, such as external formulations and transdermal absorption formulations requested by patients. The purpose of this study is to improve the solubility and skin permeability of TDF, and to develop a novel transdermal formulation with secured stability over time. The research strategy is to determine solvents that will improve TDF solubility and to screen substances that will enhance TDF permeability. Skin penetration tests were simulated by using a Strat-M® membrane in Franz diffusion cell systems. The optimal formulation (F1, consisting of TDF/HDTMA-Br at a ratio of 1:10 [weight/weight] in DPG) observed the highest permeability compared to all formulations in PBS (pH 7.4). Changes in thermal property of F1 formulation was observed and maintained its stability over 12 months including drug content (μg/mL), appearance, pH, and permeation (μg/cm2). In conclusion, DPG played a supported role in improving both TDF solubilization and permeability, whereas HDTMA-Br played a key role in enhancing permeability. It is thought that these results will be supplemented in the future to conduct research and experiments on humans.
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Affiliation(s)
- Jeong Sun Sohn
- College of General Education, Chosun University, Gwangju 61452, Republic of Korea
| | - Jin-Seok Choi
- Department of Medical Management, Chodang University, 380 Muan-ro, Muan-eup, Muan-gun, Jeollanam-do 58530, Republic of Korea.
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2
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Duarah S, Sharma M, Chen S, Proft TK, Loh J, Wen J. Design, optimization and evaluation of dexamethasone-loaded microneedles for inflammatory disorders. Int J Pharm 2023; 635:122690. [PMID: 36740077 DOI: 10.1016/j.ijpharm.2023.122690] [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: 11/11/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/05/2023]
Abstract
Dexamethasone (Dex) is a popular and highly potent anti-inflammatory drug, frequently used to treat a wide range of inflammatory disorders. However, the existing oral and parenteral delivery modes have several limitations, including systemic adverse effects and reduced patient compliance. This study aimed to develop a biodegradable microneedle (MN)-based transdermal delivery system capable of sustained, safe and effective delivery of Dex. A Quality by Design (QbD) approach was applied to design the Dex-loaded MN arrays. The formulation variables were optimized using a central composite design (CCD) model, generated with the statistical software package Design- Expert®. The optimized MNs were sharp, with heights ranging between 800 and 900 µm, appropriate for transdermal delivery. The MN arrays did not exhibit any cytotoxic effects on the fibroblast and keratinocyte cells. Moreover, the ex vivo studies confirmed the enhanced efficacy of MN-mediated skin permeation of Dex compared to passive permeation of drug solution. Finally, the in vivo anti-inflammatory efficacy was investigated using the carrageenan-induced rat paw edema model. The efficacy of the MN arrays to inhibit paw edema formation was found to be comparable to that of intravenous Dex injection and significantly greater than topical solution. Cytokine analysis also revealed that application of MN arrays downregulated the expressions of pro-inflammatory cytokines and upregulated the expressions of anti-inflammatory cytokines. Overall, the findings suggest that MN array could be a safe, easy, effective and minimally invasive alternative to the existing means of Dex delivery and could potentially be used for the treatment of inflammatory disorders.
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Affiliation(s)
- Sanjukta Duarah
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, New Zealand
| | - Manisha Sharma
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, New Zealand
| | - Shuo Chen
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, New Zealand
| | - Thomas K Proft
- Department of Molecular Medicine and Pathology, School of Medical Sciences, The University of Auckland, Auckland, New Zealand; Maurice Wilkins Centre for Biomolecular Discoveries, The University of Auckland, Auckland, New Zealand
| | - Jacelyn Loh
- Department of Molecular Medicine and Pathology, School of Medical Sciences, The University of Auckland, Auckland, New Zealand; Maurice Wilkins Centre for Biomolecular Discoveries, The University of Auckland, Auckland, New Zealand
| | - Jingyuan Wen
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, New Zealand.
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3
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A Review on Phosphodiesterase-5 Inhibitors as a Topical Therapy for Erectile Dysfunction. Sex Med Rev 2022; 10:376-391. [DOI: 10.1016/j.sxmr.2022.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 02/12/2022] [Accepted: 02/15/2022] [Indexed: 11/18/2022]
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4
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KIM MA, NEELAKANTAN P, MIN KS. Effect of N-2-methyl-pyrrolidone on <i>Enterococcus faecalis</i> biofilms. Dent Mater J 2022; 41:774-779. [DOI: 10.4012/dmj.2022-012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Mi-Ah KIM
- Department of Conservative Dentistry, School of Dentistry, Jeonbuk National University
| | - Prasanna NEELAKANTAN
- Discipline of Endodontology, Department of Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong
| | - Kyung-San MIN
- Department of Conservative Dentistry, School of Dentistry, Jeonbuk National University
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5
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Georgescu M, Meltzer V, Stănculescu I, Pincu E. Thermal Behavior of the Nimesulide-Salicylic Acid Eutectic Mixtures Prepared by Mechanosynthesis and Recrystallization. MATERIALS 2021; 14:ma14247715. [PMID: 34947308 PMCID: PMC8706752 DOI: 10.3390/ma14247715] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 01/18/2023]
Abstract
Nimesulide, salicylic acid and their binary mixtures were studied by differential scanning calorimetry (DSC) and Fourier Transform Infrared spectroscopy (FTIR). The study of such systems is a promising and viable approach for solving the problem of poor solubility of materials in general and drug systems in particular. All areas of human activity are inextricably linked to materials, and thus, the study presented in the paper and not reported in the literature is very important and provides useful data for those working in various fields. The eutectic mixtures were obtained by mechanosynthesis and by recrystallization from ethanol over the entire 0-1 range of molar fractions. For both situations at the molar fraction of nimesulide 0.5, the mixture has a eutectic that suggests an increase in solubility at this composition. The interactions that take place between the components were determined with the help of the excess thermodynamic functions (GE, SE, µE), which highlight the deviation from the ideality of the considered binary systems.
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6
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Zakharova AA, Efimova SS, Ostroumova OS. Phosphodiesterase Type 5 Inhibitors Greatly Affect Physicochemical Properties of Model Lipid Membranes. MEMBRANES 2021; 11:membranes11110893. [PMID: 34832122 PMCID: PMC8622654 DOI: 10.3390/membranes11110893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 11/17/2021] [Accepted: 11/17/2021] [Indexed: 01/04/2023]
Abstract
Although phosphodiesterase type 5 inhibitors are widely used and well-studied drugs, the potential benefits of their application in the treatment of various diseases and new drug delivery systems, including liposome forms, are still being discussed. In this regard, the role of the lipid matrix of cell membranes in the pharmacological action of the inhibitors is of special interest. It was shown that sildenafil, vardenafil, and tadalafil caused a significant decrease in the boundary potential of model membranes composed of palmitoyloleoylphosphatidylcholine or its mixture with cholesterol, by 70–80 mV. The reduction in the membrane dipole potential induced by inhibitors led to a 20–25% increase in the conductance of cation-selective pores formed by the antimicrobial peptide gramicidin A. The addition of sildenafil or vardenafil also led to a significant decrease in the temperature of the main phase transition of dipalmytoylphosphatidylcholine, by about 1.5 °C, while tadalafil did not change the melting temperature. Sildenafil, vardenafil, and tadalafil enhanced the pore-forming activity of the antifungal polyene antibiotic nystatin by 11, 13, and 2 times, respectively. This fact might indicate the induction of membrane curvature stress by the inhibitors. The data obtained might be of special interest for the development of lipid-mediated forms of drugs.
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7
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Rahbari R, Ichim I, Bamsey R, Burridge J, Guy OJ, Bolodeoku J, Graz M. Characterisation of Drug Delivery Efficacy Using Microstructure-Assisted Application of a Range of APIs. Pharmaceutics 2020; 12:pharmaceutics12121213. [PMID: 33333795 PMCID: PMC7765163 DOI: 10.3390/pharmaceutics12121213] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/09/2020] [Accepted: 12/14/2020] [Indexed: 11/16/2022] Open
Abstract
Polymer-based solid microstructures (MSts) have the potential to significantly increase the quantity and range of drugs that can be administered across the skin. MSt arrays are used to demonstrate their capacity to bypass the skin barrier and enhance permeability by creating microchannels through the stratum corneum, in a minimally invasive manner. This study is designed to demonstrate the ability of MSts to exceed the current boundaries for transdermal delivery of compounds with different molecular weights, partition coefficients, acid dissociation constants, melting points, and water solubilities. In vitro permeation of a range of selected molecules, including acetyl salicylic acid (aspirin), galantamine, selegiline hydrochloride (Sel-HCl), insulin, caffeine, hydrocortisone (HC), hydrocortisone 21-hemisuccinate sodium salt (HC-HS) and bovine serum albumin (BSA) has been studied across excised porcine skin with and without poke and patch application of MSts. Permeation of the molecules was monitored using Franz diffusion cells over 24 h. MSts significantly increased the permeation of all selected molecules up to 40 times, compared to topical applications of the molecules without MSts. The greatest increase in permeation was observed for caffeine with 70 ± 8% permeation and the lowest enhancement was observed for HC with a 2.4 ± 1.3% increase in permeation. The highest obtained flux was BSA (8133 ± 1365 μg/cm2/h) and the lowest flux observed for HC (11 ± 4 μg/cm2/h). BSA and HC also showed the highest (16,275 ± 3078 μg) and the lowest (73 ± 47 μg) permeation amount after 24 h respectively. MSt-treated skin exhibits greatly increased permeation. The molecule parameters (size, acid dissociation constant, partition coefficient and solubility)—traditional hurdles associated with passive diffusion through intact skin—are overcome using MSt skin treatment.
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Affiliation(s)
- Raha Rahbari
- Singleton Campus, Institute of Life Science 2, Swansea University, Innoture Ltd., Swansea SA2 8PP, UK; (I.I.); (R.B.); (J.B.); (J.B.); (M.G.)
- Correspondence:
| | - Ionut Ichim
- Singleton Campus, Institute of Life Science 2, Swansea University, Innoture Ltd., Swansea SA2 8PP, UK; (I.I.); (R.B.); (J.B.); (J.B.); (M.G.)
| | - Ryan Bamsey
- Singleton Campus, Institute of Life Science 2, Swansea University, Innoture Ltd., Swansea SA2 8PP, UK; (I.I.); (R.B.); (J.B.); (J.B.); (M.G.)
| | - Jemma Burridge
- Singleton Campus, Institute of Life Science 2, Swansea University, Innoture Ltd., Swansea SA2 8PP, UK; (I.I.); (R.B.); (J.B.); (J.B.); (M.G.)
| | - Owen J. Guy
- Chemistry Department, Swansea University, Swansea SA2 8PP, UK;
| | - John Bolodeoku
- Singleton Campus, Institute of Life Science 2, Swansea University, Innoture Ltd., Swansea SA2 8PP, UK; (I.I.); (R.B.); (J.B.); (J.B.); (M.G.)
| | - Michael Graz
- Singleton Campus, Institute of Life Science 2, Swansea University, Innoture Ltd., Swansea SA2 8PP, UK; (I.I.); (R.B.); (J.B.); (J.B.); (M.G.)
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8
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de França BM, Ghasemishahrestani Z, de Souza GFM, da Silva RN, Queiroz DD, Pierre MBR, Pereira MD, Forero JSB, Corrêa RJ. In vitro Studies of Antitumor Effect, Toxicity/Cytotoxicity and Skin Permeation/Retention of a Green Fluorescence Pyrene-based Dye for PDT Application. Photochem Photobiol 2020; 97:408-415. [PMID: 32967040 DOI: 10.1111/php.13335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 08/27/2020] [Accepted: 09/14/2020] [Indexed: 11/28/2022]
Abstract
Photosensitizers (PS) are compounds that can generate reactive oxygen species under irradiation of appropriate light and are widely used in photodynamic therapy (PDT). Currently, topical PDT is an effective treatment for several skin diseases, including bacterial infections, fungal mycoses and psoriasis. In addition, PDT is also used to treat nonmelanoma skin cancer and can be a potential tool for melanoma, associated with other treatments. In this work, we evaluated the antitumor photoactivity of a new pyrene-based PS (TPPy) by using the murine melanoma cell line (B16F10). The in vitro permeation/retention tests in porcine ear skin were also performed in order to evaluate the potential application of the PS for topical use in skin cancer. Moreover, to determine the toxicity in vivo, we used the Galleria mellonella as an alternative animal model of study. The results showed that TPPy is a promising PS for application in PDT, with potential antitumor photoactivity (IC50 6.5 μmol L-1 ), absence of toxicity in the G. mellonella model at higher concentration (70.0 mmol L-1 ) and the accumulation tendency in the epidermis plus dermis sites (165.20 ± 4.12 ng cm-2 ).
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Affiliation(s)
| | | | | | | | - Daniela Dias Queiroz
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Marcos Dias Pereira
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Rodrigo José Corrêa
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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9
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Kim T, Kim MA, Hwang YC, Rosa V, Del Fabbro M, Min KS. Effect of a calcium hydroxide-based intracanal medicament containing N-2-methyl pyrrolidone as a vehicle against Enterococcus faecalis biofilm. J Appl Oral Sci 2020; 28:e20190516. [PMID: 32236357 PMCID: PMC7105290 DOI: 10.1590/1678-7757-2019-0516] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 11/25/2019] [Indexed: 11/21/2022] Open
Abstract
This study investigated the effect of a calcium hydroxide (CH) paste (CleaniCal®) containing N-2-methyl pyrrolidone (NMP) as a vehicle on Enterococcus faecalis (E. faecalis) biofilms compared with other products containing saline (Calasept Plus™) or propylene glycol (PG) (Calcipex II®).
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Affiliation(s)
- Taegun Kim
- Chonbuk National University, School of Dentistry and Institute of Oral Bioscience, Department of Conservative Dentistry, Jeonju, Korea
| | - Mi-Ah Kim
- Chonbuk National University, School of Dentistry and Institute of Oral Bioscience, Department of Conservative Dentistry, Jeonju, Korea
| | - Yun-Chan Hwang
- Chonnam National University, School of Dentistry, Department of Conservative Dentistry, Gwangju, Korea
| | - Vinicius Rosa
- National University of Singapore, Faculty of Dentistry, Discipline of Oral Sciences, Singapore
| | - Massimo Del Fabbro
- Università degli Studi di Milano, Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche, Milano, Italia.,IRCCS Istituto Ortopedico Galeazzi, Milano, Italia
| | - Kyung-San Min
- Chonbuk National University, School of Dentistry and Institute of Oral Bioscience, Department of Conservative Dentistry, Jeonju, Korea.,Chonbuk National University, Research Institute of Clinical Medicine, Jeonju, Korea.,Chonbuk National University Hospital, Biomedical Research Institute, Jeonju, Korea
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10
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Shaker DS, Ishak RAH, Elhuoni MA, Ghoneim AM. Boosting transdermal delivery of atorvastatin calcium via o/w nanoemulsifying system: Two-step optimization, ex vivo and in vivo evaluation. Int J Pharm 2020; 578:119073. [PMID: 31982556 DOI: 10.1016/j.ijpharm.2020.119073] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 12/16/2022]
Abstract
A nanoemulsion system was designed for Atorvastatin calcium (ATOR) transdermal delivery to overcome its poor bioavailability of (30%) resulting from the extensive first-pass effect and dissolution rate-limited in vivo absorption. Pseudo ternary phase diagrams were developed, and various NE formulae were prepared using oleic acid (OA), Tween 80 as surfactant and PEG 400 as cosurfactant, ethanol and limonene as permeation enhancers (PEs). NEs were characterized for morphology, droplet size, zeta potential and in vitro release. The optimized formulae were assessed for ex vivo transdermal permeation and in vivo pharmacodynamic/pharmacokinetic studies. Hypocholesterolemic effect after 7 days skin treatment was detected and compared to oral ATOR dispersion. Finally, blood plasma levels were measured for 24 h for rats received the selected transdermal NE and transdermal drug in OA. The obtained results suggested the low potentiality of NE systems in transdermal delivery of lipophilic drugs, only the addition of PEs is driving factor for increasing drug flux through full thickness rat skin. In the optimized formula, the presence of ethanol and PEG 400 disrupts SC lipids exhibiting rapid ex vivo release profile compared to other NEs and to ATOR in OA. In contrast, the optimized NE achieved a prolonged plasma profile. Transdermal NE was significantly more efficient than oral administration in lowering cholesterol plasma level and in increasing ATOR bioavailability. In conclusion, data revealed no correlation between ex vivo and in vivo studies explained by the collapse of the follicles in ex vivo skin permeation study, leaving only the lipoidal pathway for NE to pass through, thus only NE components, neither nanosizing nor other reported mechanisms, are the main influencing factors. In vivo experiments suggested that o/w NE changed ATOR pathway to follicular delivery leading to accumulation of NE in follicles and consequently a prolonged plasma profile.
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Affiliation(s)
- Dalia S Shaker
- Department of Pharmaceutics &Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt (FUE), Cairo, Egypt.
| | - Rania A H Ishak
- Department of Pharmaceutics & Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt.
| | - Muaeid A Elhuoni
- Quality Control Department, Elnajah Medical Services, Benghazi, Libya
| | - Amira M Ghoneim
- Department of Pharmaceutics &Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt (FUE), Cairo, Egypt.
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11
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Ionic liquids with N-methyl-2-pyrrolidonium cation as an enhancer for topical drug delivery: Synthesis, characterization, and skin-penetration evaluation. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112166] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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12
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Influence of Acetylated Annealed Starch on the Release of β-Escin from the Anionic and Non-Ionic Hydrophilic Gels. Pharmaceutics 2020; 12:pharmaceutics12010084. [PMID: 31968699 PMCID: PMC7023413 DOI: 10.3390/pharmaceutics12010084] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/08/2020] [Accepted: 01/16/2020] [Indexed: 01/10/2023] Open
Abstract
Naturally sourced products introduced to human nutrition and rediscovered for therapy include polysaccharides from potatoes. The starch may obtain unique properties via acetylation with acetic anhydride at 13 cm3/100 g of starch as the basic dose of reagent used in industrial conditions. The hydrogel formulation was applied as a carrier for escin included in the dry extract of Aesculus hippocastanum. Six hydrogels were evaluated (methylcellulose, polyacrylic acid-Carbopol 980 NF and polyacrylate crosspolymer 11—Aristoflex Velvet) with various concentrations of the modified starch. The kinetic studies of in vitro β-escin release were carried out in purified water at 37 ± 0.5 °C using a paddle apparatus at 50 rpm and a time period of 7 h. The criterion for the most suitable model was based on a high correlation coefficient of evaluated release profiles. The addition of modified annealed acetylated potato starch resulted in prolongation of β-escin release.
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13
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Su M, Xia Y, Shen Y, Heng W, Wei Y, Zhang L, Gao Y, Zhang J, Qian S. A novel drug–drug coamorphous system without molecular interactions: improve the physicochemical properties of tadalafil and repaglinide. RSC Adv 2020; 10:565-583. [PMID: 35492562 PMCID: PMC9048229 DOI: 10.1039/c9ra07149k] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/17/2019] [Indexed: 01/24/2023] Open
Abstract
Tadalafil and repaglinide, categorized as BCS class II drugs, have low oral bioavailabilities due to their poorly aqueous solubilities and dissolutions. The aim of this study was to enhance the dissolution of tadalafil and repaglinide by co-amorphization technology and evaluate the storage and compression stability of such coamorphous system. Based on Flory–Huggins interaction parameter (χ ≤ 0) and Hansen solubility parameter (δt ≤ 7 MPa0.5) calculations, tadalafil and repaglinide was predicted to be well miscible with each other. Coamorphous tadalafil–repaglinide (molar ratio, 1 : 1) was prepared by solvent-evaporation method and characterized with respect to its thermal properties, possible molecular interactions. A single Tg (73.1 °C) observed in DSC and disappearance of crystallinity in PXRD indicated the formation of coamorphous system. Principal component analysis of FTIR in combination with Raman spectroscopy and Ss 13C NMR suggested the absence of intermolecular interactions in coamorphous tadalafil–repaglinide. In comparison to pure crystalline forms and their physical mixtures, both drugs in coamorphous system exhibited significant increases in intrinsic dissolution rate (1.5–3-fold) and could maintain supersaturated level for at least 4 hours in non-sink dissolution. In addition, the coamorphous tadalafil–repaglinide showed improved stability compared to the pure amorphous forms under long-term stability and accelerated storage conditions as well as under high compressing pressure. In conclusion, this study showed that co-amorphization technique is a promising approach for improving the dissolution rate of poorly water-soluble drugs and for stabilizing amorphous drugs. The coamorphous tadalafil–repaglinide (molar ratio, 1 : 1) prepared by solvent-evaporation method significantly improve the physicochemical properties of tadalafil and repaglinide.![]()
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Affiliation(s)
- Meiling Su
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Yanming Xia
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Yajing Shen
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Weili Heng
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Yuanfeng Wei
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Linghe Zhang
- Department of Chemistry
- Smith College
- Northampton
- USA
| | - Yuan Gao
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Jianjun Zhang
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Shuai Qian
- School of Traditional Chinese Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
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14
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Lim MJ, Jang HJ, Yu MK, Lee KW, Min KS. Removal efficacy and cytotoxicity of a calcium hydroxide paste using N-2-methyl-pyrrolidone as a vehicle. Restor Dent Endod 2017; 42:290-300. [PMID: 29142877 PMCID: PMC5682145 DOI: 10.5395/rde.2017.42.4.290] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 09/13/2017] [Indexed: 11/11/2022] Open
Abstract
Objectives This study investigated the removal efficacy and cytotoxicity of a newly developed calcium hydroxide paste (cleaniCal, Maruchi) using N-2-methyl-pyrrolidone (NMP) as a vehicle in comparison with ApexCal (Ivoclar Vivadent) and Calcipex II (Nishika), which use different vehicles such as polyethylene glycol and propylene glycol, respectively. Materials and Methods Thirty maxillary premolars with oval-shaped canals were divided into 3 groups and the teeth were filled with one of the pastes. After removal of the paste, micro-computed tomographic (μ-CT) imaging was obtained to assess the volume of residual paste in the root canal of each tooth. The teeth were then split longitudinally and the area of the paste-coated surface was evaluated by stereomicroscopy. The cytotoxicity of each product was assessed using an agar overlay assay. The effect of each vehicle on cell viability was evaluated using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The data were analyzed using one-way analysis of variance and Tukey's tests to detect any significance (p < 0.05). Results In the μ-CT and stereomicroscopic analysis, cleaniCal exhibited less remnants of medicament than ApexCal and Calcipex. cleaniCal showed a higher cytotoxicity than the other pastes in the agar overlay assay. Furthermore, NMP exhibited lower cell viability compared to the other vehicles. Conclusions cleaniCal showed better removal efficacy compared to the other products. However, clinicians should be aware of the higher cytotoxicity of the NMP-based material and consider its possible adverse effects on periradicular tissue when it is overfilled.
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Affiliation(s)
- Myung-Jin Lim
- Department of Conservative Dentistry, Chonbuk National University School of Dentistry and Institute of Oral Bioscience, Jeonju, Korea
| | - Hyun-Jin Jang
- Department of Life Science, College of Natural Sciences, Chonbuk National University, Jeonju, Korea
| | - Mi-Kyung Yu
- Department of Conservative Dentistry, Chonbuk National University School of Dentistry and Institute of Oral Bioscience, Jeonju, Korea.,Research Institute of Clinical Medicine of Chonbuk National University, Jeonju, Korea.,Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
| | - Kwang-Won Lee
- Department of Conservative Dentistry, Chonbuk National University School of Dentistry and Institute of Oral Bioscience, Jeonju, Korea.,Research Institute of Clinical Medicine of Chonbuk National University, Jeonju, Korea.,Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
| | - Kyung-San Min
- Department of Conservative Dentistry, Chonbuk National University School of Dentistry and Institute of Oral Bioscience, Jeonju, Korea.,Research Institute of Clinical Medicine of Chonbuk National University, Jeonju, Korea.,Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea
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Ashara KC, Shah KV. Association of Permeability and Lipid Content of Membrane. Folia Med (Plovdiv) 2017; 59:203-209. [DOI: 10.1515/folmed-2017-0019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 10/10/2016] [Indexed: 01/26/2023] Open
Abstract
AbstractBackground:Rat skin and goatcul de sacare mostly used in optimization of formulations as the model of human skin andcul de sac.Aim:To explore the correlation between lipid content of rat skin and goatcul de sacand permeability.Materials and methods:Find out wavelength maximum for Sapat plus malam®, Ciplox eye ointment®and chloramphenicol eye caps and the standard curve was also derived.In vitrostudies using Cellophane®membrane andex vivostudies using rat skin or goatcul de sacof the formulations. Permeability coefficient, % dislodgeable dose, lag time, diffusion parameter, and partition coefficient were found for both studies after six and a half hours of penetration studies. Student’s unpaired t-test with equal variance was used to find any statistically significant difference in theex vivoandin vitrodiffusion transport studies at 95% level of confidence.Results:Permeability coefficient of Sapat plus malam®, Ciplox eye ointment®and chloramphenicol eye caps were 0.000316 ± 0.0000625, 0.00416 ± 0.0001, 0.0034 ± 0.00004 for Cellophane®membrane and 0.0001 ± 0.000001, 0.002254 ± 0.0002, 0.00303 ± 0.0001 forex vivomembrane in cm2/min, respectively. For all three formulations, there were calculated t values which were higher than tabulated t values at 95% of confidence level (P<0.05).Conclusion:Cellophane®membrane shows a better diffusion than rat skin or goatcul de sac. In the optimization of formulation, only Cellophane®membrane is advisable to use.
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Tuntiyasawasdikul S, Limpongsa E, Jaipakdee N, Sripanidkulchai B. Effects of Vehicles and Enhancers on the Skin Permeation of Phytoestrogenic Diarylheptanoids from Curcuma comosa. AAPS PharmSciTech 2017; 18:895-903. [PMID: 27380435 DOI: 10.1208/s12249-016-0582-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 06/23/2016] [Indexed: 11/30/2022] Open
Abstract
Curcuma comosa (C. comosa) is widely used in traditional medicine as a dietary supplement for health promotion in postmenopausal women in Thailand. It contains several diarylheptanoids, which are considered to be a novel class of phytoestrogens. However, the diarylheptanoids isolated from the plant rhizome are shown to have low oral bioavailability and faster elimination characteristics. The aim of this study was to investigate the permeation behavior of the active compounds of diarylheptanoids. The effects of binary vehicle systems and permeation enhancers on diarylheptanoids permeation and accumulation within the skin were studied using side-by-side diffusion cells through the porcine ear skin. Among the tested binary vehicle systems, the ethanol/water vehicle appeared to be the most effective system for diarylheptanoids permeation with the highest flux and shortest lag time. The presence of transcutol in the vehicle system significantly increased diarylheptanoid's permeation and accumulation within the skin in a concentration-dependent manner. Although the presence of terpenes in formulation decreased the flux of diarylheptanoids, it raised the amount of diarylheptanoids retained within the skin substantially. Based on the feasibility of diarylheptanoid permeation, C. comosa extract should be further developed into an effective transdermal product for health benefits and hormone replacement therapy.
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Ashara KC, Shah KV. Emulsion of Chloramphenicol: an Overwhelming Approach for Ocular Delivery. Folia Med (Plovdiv) 2017; 59:23-30. [DOI: 10.1515/folmed-2017-0007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 08/31/2016] [Indexed: 01/26/2023] Open
Abstract
Abstract
Background: Ophthalmic formulations of chloramphenicol have poor bioavailability of chloramphenicol in the ocular cavity.
Aim: The present study aimed at exploring the impact of different oil mixtures in the form of emulsion on the permeability of chloramphenicol after ocular application.
Materials and methods: Selection of oil mixture and ratio of the components was made by an equilibrium solubility method. An emulsifier was chosen according to its emulsification properties. A constrained simplex centroid design was used for the assessment of the emulsion development. Emulsions were evaluated for physicochemical properties; zone of inhibition, in-vitro diffusion and ex-vivo local accumulation of chloramphenicol. Validation of the design using check-point batch and reduced polynomial equations were also developed. Optimization of the emulsion was developed by software Design® expert 6.0.8. Assessment of the osmolarity, ocular irritation, sterility testing and isotonicity of optimized batch were also made.
Results: Parker Neem®, olive and peppermint oils were selected as an oil phase in the ratio 63.64:20.2:16.16. PEG-400 was selected as an emulsifier according to a pseudo-ternary phase diagram. Constrained simplex-centroid design was applied in the range of 25-39% water, 55-69% PEG-400, 5-19% optimized oil mixture, and 1% chloramphenicol. Unpaired Student’s t-test showed for in-vitro and ex-vivo studies that there was a significant difference between the optimized batch of emulsion and Chloramphenicol eye caps (a commercial product) according to both were equally safe.
Conclusion: The optimized batch of an emulsion of chloramphenicol was found to be as safe as and more effective than Chloramphenicol eye caps.
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Influence of Hydrophilic Polymers on theβFactor in Weibull Equation Applied to the Release Kinetics of a Biologically Active Complex ofAesculus hippocastanum. INT J POLYM SCI 2017. [DOI: 10.1155/2017/3486384] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Triterpenoid saponins complex of biological origin, escin, exhibits significant clinical activity in chronic venous insufficiency, skin inflammation, epidermal abrasions, allergic dermatitis, and acute impact injuries, especially in topical application. The aim of the study is the comparison of various hydrogel formulations, as carriers for a horse chestnut seed extract (EH). Methylcellulose (MC), two polyacrylic acid derivatives (PA1 and PA2), and polyacrylate crosspolymer 11 (PC-11) were employed. The release rates of EH were examined and a comparison with the Weibull model equation was performed. Application of MC as the carrier in the hydrogel preparation resulted in fast release rate of EH, whereas in the case of the hydrogel composed with PC-11 the release was rather prolonged. Applied Weibull function adhered best to the experimental data. Due to the evaluated shape parameterβ, in the Weibull equation, the systems under study released the active compound according to the Fickian diffusion.
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