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Aung WW, Krongrawa W, Limmatvapirat S, Kulpicheswanich P, Okonogi S, Limmatvapirat C. Fabrication and Optimization of Electrospun Shellac Fibers Loaded with Senna alata Leaf Extract. Polymers (Basel) 2024; 16:183. [PMID: 38256981 PMCID: PMC10819501 DOI: 10.3390/polym16020183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 12/31/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
Single-fluid electrospinning creates nanofibers from molten polymer solutions with active ingredients. This study utilized a combination of a fractional factorial design and a Box-Behnken design to examine crucial factors among a multitude of parameters and to optimize the electrospinning conditions that impact fiber mats' morphology and the entrapment efficiency of Senna alata leaf extract. The findings indicated that the shellac content had the greatest impact on both fiber diameter and bead formation. The optimum electrospinning conditions were identified as a voltage of 24 kV, a solution feed rate of 0.8 mL/h, and a shellac-extract ratio of 38.5:3.8. These conditions produced nanosized fibers with a diameter of 306 nm, a low bead-to-fiber ratio of 0.29, and an extract entrapment efficiency of 96% within the fibers. The biphasic profile of the optimized nanofibers was confirmed with an in vitro release study. This profile consisted of an initial burst release of 88% within the first hour, which was succeeded by a sustained release pattern surpassing 90% for the next 12 h, as predicted with zero-order release kinetics. The optimized nanofibers demonstrated antimicrobial efficacy against diverse pathogens, suggesting promising applications in wound dressings and protective textiles.
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Affiliation(s)
- Wah Wah Aung
- Department of Industrial Pharmacy, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand; (W.W.A.); (W.K.); (S.L.)
- Pharmaceutical Biopolymer Group (PBiG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
| | - Wantanwa Krongrawa
- Department of Industrial Pharmacy, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand; (W.W.A.); (W.K.); (S.L.)
- Pharmaceutical Biopolymer Group (PBiG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
| | - Sontaya Limmatvapirat
- Department of Industrial Pharmacy, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand; (W.W.A.); (W.K.); (S.L.)
- Pharmaceutical Biopolymer Group (PBiG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
| | | | - Siriporn Okonogi
- Center of Excellence in Pharmaceutical Nanotechnology, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand;
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chutima Limmatvapirat
- Department of Industrial Pharmacy, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand; (W.W.A.); (W.K.); (S.L.)
- Pharmaceutical Biopolymer Group (PBiG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
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Vera-Vázquez F, Ramírez-Bribiesca JE, Cruz-Monterrosa RG, Crosby-Galvan MM, Barcena-Gama JR, Ramírez DT, Mejía-Méndez JL, Vallejo-Hernández LH, López-Mena ER. Enhancing Pectin Particles with Polymer Additives: Mitigating Rumen Degradation and Minimizing Yellowish Milk Color in Grazed Cows. Polymers (Basel) 2023; 16:106. [PMID: 38201771 PMCID: PMC10780586 DOI: 10.3390/polym16010106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/20/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
The pigments consumed in grazing give the milk from dual-purpose cows raised in tropical conditions a yellowish color, affecting the quality and price of the milk. This study aimed to develop an economical method with supplementary pectin to antagonize the availability of carotenes by designing microparticles with shellac and palm oil as a viable alternative to protect pectin degradation against rumen microbes. Three preparations of microparticles based on citrus pectin were synthesized: unprotected (PnP), protected with palm oil (PwP), and protected with palm oil and shellac (PwPL) microparticles. Samples were roughly characterized by spectroscopy and electron microscopy techniques. The effect of PnP, PwP, and PwPL on blood metabolites and physicochemical characteristics of the milk of grazing lactating cows was evaluated through in vivo assays. The release of citrus pectin from microparticles was determined as uronic acids using solutions with distinct pH, whereas its degradation was studied using in situ tests. Results revealed that PnP, PwP, and PwPL are amorphous structures with sizes that range from 60 to 265 nm or 750 to 3570 µm and have surface charges that range from -11.5 to -50.2 mV. Samples exhibited characteristic peaks during FTIR analyses that corresponded to O-H, C=O, and COOCH3 groups and bands within the UV-vis region that indicated the absorption of pectin. The EDS analysis revealed the presence of carbon, oxygen, or calcium in samples. The release of uronic acids was higher at pH 2-3 with PwPL. The in situ degradability of PnP, PwP, and PwPL was 99, 28.4, and 17.7%, respectively. Moreover, PwPL decreased the blood concentration of glucose, cholesterol, and lactate. In contrast, 100 g of pectin per animal daily during the feed process reduced yellow coloring. In conclusion, designing particles protected with lipids and polymers as shellac is an economical method that resists degradation at pH levels greater than five.
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Affiliation(s)
- Francisco Vera-Vázquez
- Programa de Ganadería, Colegio de Postgraduados, Km. 36.5, Montecillo, Texcoco 56230, Estado de México, Mexico; (F.V.-V.); (M.M.C.-G.); (J.R.B.-G.)
| | - Jacinto Efrén Ramírez-Bribiesca
- Programa de Ganadería, Colegio de Postgraduados, Km. 36.5, Montecillo, Texcoco 56230, Estado de México, Mexico; (F.V.-V.); (M.M.C.-G.); (J.R.B.-G.)
| | - Rosy G. Cruz-Monterrosa
- División de Ciencias Biológicas y de la Salud, Departamento de Ciencias de la Alimentación, Universidad Autónoma Metropolitana, Unidad Lerma, Av. Hidalgo Poniente 46, Col. La Estación, Lerma de Villada 52006, Estado de México, Mexico
| | - María M. Crosby-Galvan
- Programa de Ganadería, Colegio de Postgraduados, Km. 36.5, Montecillo, Texcoco 56230, Estado de México, Mexico; (F.V.-V.); (M.M.C.-G.); (J.R.B.-G.)
| | - José Ricardo Barcena-Gama
- Programa de Ganadería, Colegio de Postgraduados, Km. 36.5, Montecillo, Texcoco 56230, Estado de México, Mexico; (F.V.-V.); (M.M.C.-G.); (J.R.B.-G.)
| | | | - Jorge L. Mejía-Méndez
- Laboratorio en Investigación Fitoquímica, Departamento de Ciencias Químico-Biológicas, Universidad de las Américas Puebla, Ex Hacienda Sta. Catarina Mártir S/N, Puebla 72810, San Andrés Cholula, Mexico;
| | - Laura H. Vallejo-Hernández
- Departamento de Enseñanza, Investigación y Servicio en Zootecnia, Universidad Autónoma Chapingo, Km. 38.5 Carretera México—Texcoco, Chapingo, Texcoco 56230, Estado de México, Mexico;
| | - Edgar R. López-Mena
- Escuela de Ingeniería y Ciencias, Campus Guadalajara, Tecnológico de Monterrey, Av. Gral. Ramón Corona No 2514, Zapopan 45121, Colonia Nuevo México, Mexico;
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Sunakawa Y, Kondo M, Yamamoto Y, Inomata T, Inoue Y, Mori D, Mizuno T. Design of Cell-Adhesive Shellac Derivatives and Endowment of Photoswitchable Cell-Adhesion Properties. ACS Appl Bio Mater 2023; 6:5493-5501. [PMID: 37978057 DOI: 10.1021/acsabm.3c00684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The emergence of new biodegradable cell-adhesion materials is an attractive topic in biomaterial chemistry, particularly for the development of cell incubation scaffolds and drug encapsulation materials used in in situ regenerative therapy. Shellac is a natural resin with unique film-forming properties and high miscibility with various chemicals, in addition to being biodegradable and nontoxic to biological systems. However, since native shellac does not adhere to mammalian cells, there have been no reports of using shellac to develop cell-adhesive biomaterials. In this study, we report on the development of cell-adhesive shellac derivatives through slight chemical modification. Shellac is a mixture of oligoesters that consists of hydroxyl fatty acids and resin acids, and therefore, all oligomers have one carboxylic acid group at the terminal. We discovered that a simple modification of hydrophobic chemical groups, particularly those containing aromatic groups in the ester form, could dramatically improve cell-adhesion properties for mammalian cells. Furthermore, by using photocleavable esters containing aromatic groups, we successfully endowed photoswitchable properties in cell adhesion. Given that shellac is a low-cost, biodegradable, and nontoxic natural resin, the modified shellacs have the potential to become new and attractive biomaterials applicable to in situ regenerative therapy.
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Affiliation(s)
- Yurino Sunakawa
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Mai Kondo
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Yasushi Yamamoto
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Tomohiko Inomata
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Yasumichi Inoue
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Daisuke Mori
- Gifu Shellac Manufacturing Co., Ltd., 1-41, Higashiuzura, Gifu-shi, Gifu 500-8618, Japan
| | - Toshihisa Mizuno
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
- Department of Nanopharmaceutical Sciences, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
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Liu L, Li X, Dong G, Zhang H, Tao YF, He R, Xu J, Ma J, Tang B, Zhou B. Bioinspired Natural Shellac Dressing for Rapid Wound Sealing and Healing. ACS Appl Mater Interfaces 2023; 15:43294-43308. [PMID: 37695271 DOI: 10.1021/acsami.3c06734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Developing safe and effective wound dressings that address the complexities of wound healing is an ongoing goal in biomaterials research. Inspired by the shield used to protect lac insects, we have designed and developed a type of bioactive shellac-based wound dressing in this paper. The dressing exhibited a high adhesion energy of 146.6 J·m-2 in porcine skin and showed a reversible binding due to its pH sensitivity. Meanwhile, a novel "shellac-like" compound, n-octacosanol gallate ester, has been synthesized and added to the dressing to improve its antibacterial and blood coagulation properties. The novel shellac-based dressing could be sprayed to form a sticky film within 70 s for rapid hemostasis and wound sealing, which could be conveniently applied to various wounds on extensible body parts. In addition, the shellac-based dressing can actively promote the healing of a full-thickness wound in the skin of mice. We also used molecular dynamics simulations to investigate the interactions between the shellac molecule and the phospholipid bilayer and attempted to show that the shellac molecule was beneficial for wound healing. This work provides a novel and practical bioinspired wound dressing with significant properties, facile preparation, and ease of use, which is an interesting alternative to its traditional counterparts.
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Affiliation(s)
- Lanxiang Liu
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Xiang Li
- Yunnan Province Key Laboratory of Wood Adhesives and Glued Products, Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, International Joint-Research Center for Bio-Materials, Ministry of Science and Technology, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
- College of Life Science and College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Gang Dong
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Hong Zhang
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Yun-Feng Tao
- College of Life Science and College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Rui He
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Juan Xu
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Jinju Ma
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Baoshan Tang
- Institute of Highland Forest Science, Chinese Academy of Forestry. Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650233, China
| | - Bei Zhou
- Yunnan Province Key Laboratory of Wood Adhesives and Glued Products, Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, International Joint-Research Center for Bio-Materials, Ministry of Science and Technology, College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
- College of Life Science and College of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
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Han T, Chen W, Zhong Q, Chen W, Xu Y, Wu J, Chen H. Development and Characterization of an Edible Zein/ Shellac Composite Film Loaded with Curcumin. Foods 2023; 12:foods12081577. [PMID: 37107372 PMCID: PMC10137614 DOI: 10.3390/foods12081577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/29/2023] [Accepted: 04/03/2023] [Indexed: 04/29/2023] Open
Abstract
The development of functional edible films is promising for the food industry, and improving the water barrier of edible films has been a research challenge in recent years. In this study, curcumin (Cur) was added to zein (Z) and shellac (S) to prepare an edible composite film with a strong water barrier and antioxidant properties. The addition of curcumin significantly reduced the water vapor permeability (WVP), water solubility (WS), and elongation at break (EB), and it clearly improved the tensile strength (TS), water contact angle (WCA), and optical properties of the composite film. The ZS-Cur films were characterized by SEM, FT-IR, XRD, DSC, and TGA; the results indicated that hydrogen bonds were formed among the curcumin, zein, and shellac, which changed the microstructure and improved the thermal stability of the film. A test of curcumin release behavior showed controlled release of curcumin from the film matrix. ZS-Cur films displayed remarkable pH responsiveness, strong antioxidant properties, and inhibitory effects on E. coli. Therefore, the insoluble active food packaging prepared in this study provides a new strategy for the development of functional edible films and also provides a possibility for the application of edible films to extend the shelf life of fresh food.
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Affiliation(s)
- Tao Han
- HNU-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Wenxue Chen
- HNU-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Qiuping Zhong
- HNU-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Weijun Chen
- HNU-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Yaping Xu
- HNU-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Jiawu Wu
- HNU-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Haiming Chen
- HNU-HSF/LWL Collaborative Innovation Laboratory, School of Food Science and Engineering, Hainan University, 58 Renmin Road, Haikou 570228, China
- Maritime Academy, Hainan Vocational University of Science and Technology, 18 Qiongshan Road, Haikou 571126, China
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Vrabič-Brodnjak U. Bio-Based Adhesives Formulated from Tannic Acid, Chitosan, and Shellac for Packaging Materials. Polymers (Basel) 2023; 15:polym15051302. [PMID: 36904541 PMCID: PMC10007413 DOI: 10.3390/polym15051302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/24/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
The aim of this study was to develop bio-based adhesives that can be used for various packaging papers. In addition to commercial paper samples, papers produced from harmful plant species in Europe, such as Japanese Knotweed and Canadian Goldenrod, were used. In this research, methods were developed to produce bio-based adhesive solutions in combinations of tannic acid, chitosan, and shellac. The results showed that the viscosity and adhesive strength of the adhesives were best in solutions with added tannic acid and shellac. The tensile strength with adhesives of tannic acid and chitosan was 30% better than with commercial adhesives and 23% for combinations of shellac and chitosan. For paper from Japanese Knotweed and Canadian Goldenrod, the most durable adhesive was pure shellac. Because the surface morphology of the invasive plant papers was more open and had numerous pores compared to the commercial papers, the adhesives penetrated the paper structure and filled the voids. There was less adhesive on the surface and the commercial papers achieved better adhesive properties. As expected, the bio-based adhesives also showed an increase in peel strength and exhibited favorable thermal stability. In summary, these physical properties support the use of bio-based adhesives use in different packaging applications.
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Affiliation(s)
- Urška Vrabič-Brodnjak
- Department of Textiles, Graphic Arts and Design, Faculty of Natural Sciences and Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
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Schubert S, Worm M, Dickel H, Wagner N, Brans R, Schröder-Kraft C, Bauer A, Koch A, Geier J. Patch testing shellac in consecutive patients-Data of the Information Network of Departments of Dermatology (IVDK) 2021. Contact Dermatitis 2023; 88:77-80. [PMID: 36163611 DOI: 10.1111/cod.14227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/21/2022] [Accepted: 09/22/2022] [Indexed: 01/06/2023]
Affiliation(s)
- Steffen Schubert
- Information Network of Departments of Dermatology (IVDK), Institute at the University Medical Center Göttingen, Göttingen, Germany
| | - Margitta Worm
- Allergy and Immunology, Department of Dermatology and Allergy, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Heinrich Dickel
- Department of Dermatology, Venereology and Allergology, St. Josef Hospital, University Medical Center, Ruhr University Bochum, Bochum, Germany
| | - Nicola Wagner
- Department of Dermatology, Erlangen University Hospital, Friedrich-Alexander University of Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Richard Brans
- Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) at the University of Osnabrück, Osnabrück, Germany.,Department of Dermatology, Environmental Medicine, and Health Theory, University of Osnabrück, Osnabrück, Germany
| | - Claudia Schröder-Kraft
- Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) at the University of Osnabrück, Osnabrück, Germany.,Dermatologic Center, BG Klinikum Hamburg, Hamburg, Germany
| | - Andrea Bauer
- Department of Dermatology, University Allergy Center, University Hospital Carl Gustav Carus, Technical University Dresden, Dresden, Germany
| | - André Koch
- Department of Dermatology and Allergology, Academic Teaching Hospital Dresden-Friedrichstadt, Dresden, Germany
| | - Johannes Geier
- Information Network of Departments of Dermatology (IVDK), Institute at the University Medical Center Göttingen, Göttingen, Germany
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Krongrawa W, Limmatvapirat S, Vollrath MK, Kittakoop P, Saibua S, Limmatvapirat C. Fabrication, Optimization, and Characterization of Antibacterial Electrospun Shellac Fibers Loaded with Kaempferia parviflora Extract. Pharmaceutics 2022; 15. [PMID: 36678752 DOI: 10.3390/pharmaceutics15010123] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/22/2022] [Accepted: 12/22/2022] [Indexed: 01/01/2023] Open
Abstract
This study aimed to develop a Kaempferia parviflora (KP) extract based on electrospun shellac fibers capable of transporting methoxyflavones. This study used a Box-Behnken design to determine the optimal production parameters that influence the fiber diameter and bead-to-fiber ratio responses. The optimization step produced fibers with a small diameter (574 nm) and a lower bead-to-fiber ratio (0.48 beads per fiber) by combining 37.25% w/w shellac and 1.50% w/w KP extract with a solution feed rate of 0.8 mL/h and an electrical voltage of 18 kV. The KP extract was found to be dispersed throughout the electrospun shellac fibers during the characterization study. The results were highly correlated with the theoretical values, indicating that the regression models used to predict the response variables were adequate. A study of in vitro dissolution confirmed that KP extract-loaded electrospun shellac fibers could produce a sustained-release profile within 10 h. Additionally, KP-infused shellac fibers demonstrated antibacterial activity against Staphylococcus aureus. This KP loading method combined with shellac properties provided a new delivery system and could be used to explore novel biomedical materials.
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Hindi SS, Dawoud UM, Asiry KA. Bioplastic Floss of a Novel Microwave-Thermospun Shellac: Synthesis and Bleaching for Some Dental Applications. Polymers (Basel) 2022; 15. [PMID: 36616491 DOI: 10.3390/polym15010142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/22/2022] [Indexed: 12/31/2022] Open
Abstract
In this paper, crude flakes (CFs) of shellac were converted into purified, nonwoven, thermospun fibers (shellac floss) using two devices, namely, an electric thermospinner (ETS) and a microwave thermospinner (MTS). This conversion was achieved by the action of heating and the centrifugal forces that arose toward the outside of the spinner-head cavity. The dissolved MTS floss was bleached using hydrogen peroxide to produce the bleached MTS floss. The unbleached shellac (CFs, ETS floss, and MTS floss) and the bleached MTS floss were characterized physically and chemically. There was no deterioration in the floss properties due to the heating tools or bleaching process. For the unbleached shellac, although there were no statistical differences in properties among the three shellac types (CFs, ETS floss, and MTS floss), except for insolubility in hot alcohol, acid value, and moisture content, the MTS floss exhibited superior values compared with the other types for nearly all the properties studied. Bleaching the MTS floss produced the greatest color change among other studies, caused a high reduction in insoluble solid matter due to increasing the solubility of some of the solid constituents of shellac, and slightly decreased its Young's modulus (E). The important dental applications were surveyed and it was suggested that the suitability was enhanced by using the bleached MTS floss, based on its superior whiteness, along with the unique properties detected.
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Gaber DA, Alnwiser MA, Alotaibi NL, Almutairi RA, Alsaeed SS, Abdoun SA, Alsubaiyel AM. Design and optimization of ganciclovir solid dispersion for improving its bioavailability. Drug Deliv 2022; 29:1836-1847. [PMID: 35674640 DOI: 10.1080/10717544.2022.2083723] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Development of new approaches for oral delivery of an existing antiviral drug aimed to enhance its permeability and hence bioavailability. Ganciclovir (GC) is an antiviral drug that belongs to class III in biopharmaceutical classification. The encapsulation of poorly absorbed drugs within nanosized particles offers several characteristics to drug due to their acquired surface properties. In the following study, the solvent evaporation technique was used to incorporate GC, within elegant nanosize particles using cyclodextrin and shellac polymers for enhancing its permeability and release pattern. Formulation variables were optimized using 23 full factorial design. The prepared formulations were assessed for yield, particle size, content, and micromeritics behavior. The optimized formula (F6) was identified through differential scanning calorimetry and Fourier transform infrared. In vitro release and stability were also assessed. Pharmacokinetic parameters of optimized nano GC solid dispersion particles (NGCSD-F6) were finally evaluated. The optimized formula (F6) showed a mean particle size of 288.5 ± 20.7 nm, a zeta potential of about 23.87 ± 2.27, and drug content 95.77 ± 2.1%. The in vitro drug release pattern of F6 showed an initial burst release followed by a sustained release over the next 12 h. The optimized formula showed accepted stability upon storage at room and refrigerator temperatures for 6 months with good flowing properties (Carr's index = 18.28 ± 0.44). In vivo pharmacokinetic study in rabbits revealed 2.2 fold increases in the bioavailability of GC compared with commercial convention tablets. The study affords evidence for the success of the solid dispersion technique under specified conditions in improvement of bioavailability of GC.
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Affiliation(s)
- Dalia A Gaber
- Department of Pharmaceutics, College of Pharmacy, AL-Qassim University, Qassim, KSA.,Department of Quality Control & Quality Assurance, Holding Company for Biological Products and Vaccines, Cairo, Egypt
| | | | | | | | | | - Siham A Abdoun
- Department of Pharmaceutics, College of Pharmacy, AL-Qassim University, Qassim, KSA
| | - Amal M Alsubaiyel
- Department of Pharmaceutics, College of Pharmacy, AL-Qassim University, Qassim, KSA
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11
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Camargo JR, Fernandes-Junior WS, Azzi DC, Rocha RG, Faria LV, Richter EM, Muñoz RAA, Janegitz BC. Development of New Simple Compositions of Silver Inks for the Preparation of Pseudo-Reference Electrodes. Biosensors (Basel) 2022; 12:761. [PMID: 36140146 PMCID: PMC9497032 DOI: 10.3390/bios12090761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/02/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
Silver materials are known to present excellent properties, such as high electrical and thermal conductivity as well as chemical stability. Silver-based inks have drawn a lot of attention for being compatible with various substrates, which can be used in the production uniform and stable pseudo-reference electrodes with low curing temperatures. Furthermore, the interest in the use of disposable electrodes has been increasing due to the low cost and the possibility of their use in point-of-care and point-of-need situations. Thus, in this work, two new inks were developed using Ag as conductive material and colorless polymers (nail polish (NP) and shellac (SL)), and applied to different substrates (screen-printed electrodes, acetate sheets, and 3D-printed electrodes) to verify the performance of the proposed inks. Measurements attained with open circuit potential (OCP) attested to the stability of the potential of the pseudo-reference proposed for 1 h. Analytical curves for β-estradiol were also obtained using the devices prepared with the proposed inks as pseudo-references electrodes, which presented satisfactory results concerning the potential stability (RSD < 2.6%). These inks are simple to prepare and present great alternatives for the development of pseudo-reference electrodes useful in the construction of disposable electrochemical systems.
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Affiliation(s)
- Jéssica R. Camargo
- Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, Araras 13600-970, SP, Brazil
| | - Wilson S. Fernandes-Junior
- Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, Araras 13600-970, SP, Brazil
| | - Déborah C. Azzi
- ADB Pesquisa e Desenvolvimento, Araras 13600-140, SP, Brazil
| | - Raquel G. Rocha
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia 38400-902, MG, Brazil
| | - Lucas V. Faria
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia 38400-902, MG, Brazil
| | - Eduardo M. Richter
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia 38400-902, MG, Brazil
| | - Rodrigo A. A. Muñoz
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia 38400-902, MG, Brazil
| | - Bruno C. Janegitz
- Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, Araras 13600-970, SP, Brazil
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12
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Zeng Q, Yu X, Wei N, Wu Z, Liu Q, Chen N, Zhao W. Effect of Impregnation with Natural Shellac Polymer on the Mechanical Properties of Fast-Growing Chinese Fir. Polymers (Basel) 2022; 14:3871. [PMID: 36146016 DOI: 10.3390/polym14183871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/07/2022] [Accepted: 09/11/2022] [Indexed: 11/18/2022] Open
Abstract
Fast-growing Chinese fir wood has shortfalls such as loose structure and low strength because it grows faster than natural trees. Resin impregnation is a great way to increase the strength of fast-growing fir. However, the resin used for impregnation is a kind of urea-formaldehyde resin, phenolic formaldehyde resin, melamine formaldehyde resin, and the like, which introduce harmful substances such as formaldehyde or phenolic into the wood. In this paper, Chinese fir wood was impregnated with natural shellac polymer, and the effects of impregnation variables on the mechanical properties of the wood were examined. The increase in strength in compression perpendicular to grain (SCPG) of wood samples impregnated with 15% shellac solution achieved a maximum value of 39.01%, but the modulus of rupture (MOR) was slightly reduced. The effects of the impregnation pressure, time, and their interaction were investigated by the response surface method (RSM). ANOVA analysis revealed that the impregnation pressure and time and the interaction between the two seemed to have a significant effect on ∆SCPG. Based on the response face model, the corresponding optimal parameters obtained are 1.0 MPa and 16.0 min for impregnation pressure and time, respectively. By impregnating fir wood with the above optimal conditions, the SCPG increased by 85.78%, whereas the MOR decreased by the least amount.
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13
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Han Y, Yan X, Tao Y. Effect of Transparent, Purple, and Yellow Shellac Microcapsules on Properties of the Coating on Paraberlinia bifoliolata Surface. Polymers (Basel) 2022; 14:polym14163304. [PMID: 36015561 PMCID: PMC9412888 DOI: 10.3390/polym14163304] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/03/2022] [Accepted: 08/10/2022] [Indexed: 01/27/2023] Open
Abstract
In order to explore the applicability of the waterborne coating with self-repairing microcapsules based on the surface of wood boards and specify the optimal range of microcapsule content in the coating, three different kinds of shellac microcapsules (transparent shellac, purple shellac, and yellow shellac) were embedded in a waterborne acrylic coating at 0, 1.5 wt.%, 3.0 wt.%, 4.5 wt.%, 6.0 wt.%, and 7.5 wt.%. The Beli wood (Paraberlinia bifoliolata) boards were then covered with self-repairing coatings to investigate the self-repairing coating’s physical and chemical properties, aging resistance, and scratch repair abilities. The findings demonstrated that the chromatic difference and gloss of surface coatings on Beli wood boards were significantly influenced by the content of microcapsules. The optical characteristics and cold liquid resistance performance of the coating on Beli wood were enhanced when the microcapsule content was 3.0 wt.%. Additionally, the mechanical qualities of the coating with 3.0 wt.% transparent shellac microcapsules on Beli wood surface were better, with an H hardness, grade 2 adhesion, and 8 kg·cm of impact strength. The studies on scratch repairing and aging resistance indicated that microcapsules helped to slow down the coating’s damage and retard aging. After a microcrack appeared, the waterborne coating with microcapsules on Beli wood’s surface had the capacity to repair itself. After aging, the coating with 3.0 wt.% transparent shellac microcapsule on Beli wood boards had a better performance on the comprehensive properties, with a 28.9% light loss rate and a 6 kg·cm impact resistance. It also had a 25.0% repairing rate in scratch width after being damaged for 5 d. This study advances the development of self-healing waterborne coatings on the wood board with shellac microcapsules by examining the effects of shellac in various colors and shellac microcapsule content in waterborne coatings.
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Affiliation(s)
- Yan Han
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
- College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China
| | - Xiaoxing Yan
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
- College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China
- Correspondence:
| | - Yu Tao
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
- College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China
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14
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Mercader-García P. Occupational allergic contact dermatitis caused by shellac. Contact Dermatitis 2022; 86:557-559. [PMID: 35194808 DOI: 10.1111/cod.14083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 02/14/2022] [Accepted: 02/18/2022] [Indexed: 11/27/2022]
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15
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Melchers RC, Quint KD, van Zuuren EJ. Contact allergy to a shellac containing mouthguard. Contact Dermatitis 2022; 86:554-556. [PMID: 35188994 PMCID: PMC9311161 DOI: 10.1111/cod.14081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 02/10/2022] [Accepted: 02/17/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Rutger C Melchers
- Department of Dermatology, Leiden University Medical Center, The Netherlands
| | - Koen D Quint
- Department of Dermatology, Leiden University Medical Center, The Netherlands
| | - Esther J van Zuuren
- Department of Dermatology, Leiden University Medical Center, The Netherlands
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16
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Zhang H, Wang J, Sun X, Zhang Y, Dong M, Wang X, Li L, Wang L. Fabrication and Characterization of Quercetagetin-Loaded Nanoparticles Based on Shellac and Quaternized Chitosan: Improvement of Encapsulation Efficiency and Acid and Storage Stabilities. J Agric Food Chem 2021; 69:15670-15680. [PMID: 34923817 DOI: 10.1021/acs.jafc.1c01830] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Shellac can be used as an ideal delivery vehicle to deliver and protect the hydrophobic quercetagetin; the barriers such as low acid stability and encapsulation efficiency, however, heavily impede the application of shellac. The purpose of this work is to prepare quercetagetin-loaded shellac-quaternized chitosan nanoparticles (Que-Sh-QCS NPs) to overcome these challenges. Herein, quaternized chitosan, with 14% degree of substitution, was successfully synthesized via a quaternization modification. The concentration of quaternized chitosan over 0.05% can prevent the aggregation of shellac nanoparticles at the acid. The encapsulation efficiency of quercetagetin obviously increased from 37.92 to 65.48% with the concentration of QCS varying from 0 to 0.05%. Meanwhile, Que-Sh-QCS0.05 NPs possessed good storage stability, antioxidant property, biocompatibility, and controlled release. Therefore, quaternized chitosan can improve the encapsulation efficiency and acid and storage stabilities of nutraceutical-loaded shellac nanoparticles, providing a new insight into the application of shellac in cosmetics, pharmaceuticals, and food.
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Affiliation(s)
- Hui Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, China
| | - Jiao Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, China
| | - Xinyu Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, China
| | - Yalan Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, China
| | - Mengna Dong
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, China
| | - Xin Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, China
| | - Lihua Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, China
| | - Li Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, China
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17
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Abstract
Delivery systems play a crucial role in enhancing the activity of active substances; however, they require complex processing techniques and raw material design to achieve the desired properties. In this regard, raw materials that can be easily processed for different delivery systems are garnering attention. Among these raw materials, shellac, which is the only pharmaceutically used resin of animal origin, has been widely used in the development of various delivery systems owing to its pH responsiveness, biocompatibility, and degradability. Notably, shellac performs better on encapsulating hydrophobic active substances than other natural polymers, such as polysaccharides and proteins. In addition, specially designed shellac-based delivery systems can also be used for the codelivery of hydrophilic and hydrophobic active substances. Shellac is most widely used for oral administration, as shellac-based delivery systems can form a compact structure through hydrophobic interaction, protecting transported active substances from the harsh environment of the stomach to achieve targeted delivery in the small intestine or colon. In this review, the advantages of shellac in delivery systems are discussed in detail. Multiscale shellac-based delivery systems from the macroscale to nanoscale are comprehensively introduced, including matrix tablets, films, enteric coatings, hydrogels, microcapsules, microparticles (beads/spheres), nanoparticles, and nanofibers. Furthermore, the hotspots, deficiencies, and future perspectives of shellac-based delivery system development are also analyzed. We hoped this review will increase the understanding of shellac-based delivery systems and inspire their further development.
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Affiliation(s)
- Yi Yuan
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Ni He
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Liya Dong
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Qiyong Guo
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Xia Zhang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Bing Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Lin Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
- School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
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18
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Yan G, Cao Z, Devine D, Penning M, Gately NM. Physical Properties of Shellac Material Used for Hot Melt Extrusion with Potential Application in the Pharmaceutical Industry. Polymers (Basel) 2021; 13:polym13213723. [PMID: 34771279 PMCID: PMC8587309 DOI: 10.3390/polym13213723] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/18/2021] [Accepted: 10/26/2021] [Indexed: 11/29/2022] Open
Abstract
Hot melt extrusion offers an efficient way of increasing the solubility of a poorly soluble drug. Shellac has potential as a pharmaceutical matrix polymer that can be used in this extrusion process, with further advantages for use in enteric drug delivery systems. The rheological property of a material affects the extrusion process conditions. However, the literature does not refer to any published work that investigates the processability of various shellac materials. This work explores various types of shellac and explores their physicochemical and thermal properties along with their processability in the hot melt extrusion application. Physicochemical characterization of the materials was achieved using differential scanning calorimetry, Fourier transform infrared spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy. Additional processability characterization was achieved using melt flow index and rheology analysis. The results indicated that there was no chemical difference between the various shellac types compared in this study. However, the extrudable temperature ranges and rheological properties of different shellac types varied; SSB 55 Pharma FL had the lowest processing temperature and glass transition temperatures. Due to the shear-thinning behaviours, shellac can be extruded at lower temperatures. This study provides necessary data to determine the processing conditions in hot melt extrusion applications for the range of shellac materials.
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Affiliation(s)
- Guangming Yan
- Materials Research Institute, Technological University of the Shannon, Midlands Midwest, N37 HD68 Co. Westmeath, Ireland; (G.Y.); (Z.C.); (D.D.)
| | - Zhi Cao
- Materials Research Institute, Technological University of the Shannon, Midlands Midwest, N37 HD68 Co. Westmeath, Ireland; (G.Y.); (Z.C.); (D.D.)
| | - Declan Devine
- Materials Research Institute, Technological University of the Shannon, Midlands Midwest, N37 HD68 Co. Westmeath, Ireland; (G.Y.); (Z.C.); (D.D.)
| | - Manfred Penning
- Shellac Consultant, Wormser Strasse 28, D-55277 Oppenheim, Germany;
| | - Noel M. Gately
- Materials Research Institute, Technological University of the Shannon, Midlands Midwest, N37 HD68 Co. Westmeath, Ireland; (G.Y.); (Z.C.); (D.D.)
- Correspondence: ; Tel.: +35-387-621-7186
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19
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Al-Obaidy SSM, Greenway GM, Paunov VN. Enhanced Antimicrobial Action of Chlorhexidine Loaded in Shellac Nanoparticles with Cationic Surface Functionality. Pharmaceutics 2021; 13:1389. [PMID: 34575466 PMCID: PMC8470920 DOI: 10.3390/pharmaceutics13091389] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/28/2021] [Accepted: 08/29/2021] [Indexed: 12/01/2022] Open
Abstract
We report on an active nanocarrier for chlorhexidine (CHX) based on sterically stabilized shellac nanoparticles (NPs) with dual surface functionalization, which greatly enhances the antimicrobial action of CHX. The fabrication process for the CHX nanocarrier is based on pH-induced co-precipitation of CHX-DG from an aqueous solution of ammonium shellac and Poloxamer 407 (P407), which serves as a steric stabilizing agent. This is followed by further surface modification with octadecyl trimethyl ammonium bromide (ODTAB) through a solvent change to yield cationic surface functionality. In this study, we assessed the encapsulation efficiency and release kinetics of the novel nanocarrier for CHX. We further examined the antimicrobial effects of the CHX nanocarriers and their individual components in order to gain better insight into how they work, to improve their design and to explore the impacts of their dual functionalization. The antimicrobial actions of CHX loaded in shellac NPs were examined on three different proxy microorganisms: a Gram-negative bacterium (E. coli), a yeast (S. cerevisiae) and a microalgae (C. reinhardtii). The antimicrobial actions of free CHX and CHX-loaded shellac NPs were compared over the same CHX concentration range. We found that the non-coated shellac NPs loaded with CHX showed inferior action compared with free CHX due to their negative surface charge; however, the ODTAB-coated, CHX-loaded shellac NPs strongly amplified the antimicrobial action of the CHX for the tested microorganisms. The enhancement of the CHX antimicrobial action was thought to be due to the increased electrostatic adhesion between the cationic surface of the ODTAB-coated, CHX-loaded shellac NPs and the anionic surface of the cell walls of the microorganisms, ensuring direct delivery of CHX with a high concentration locally on the cell membrane. The novel CHX nanocarriers with enhanced antimicrobial action may potentially find applications in dentistry for the development of more efficient formulations against conditions such as gingivitis, periodontitis and other oral infections, as well as enabling formulations to have lower CHX concentrations.
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Affiliation(s)
- Saba S. M. Al-Obaidy
- Department of Chemistry and Biochemistry, University of Hull, Hull HU6 7RX, UK; (S.S.M.A.-O.); (G.M.G.)
- Department of Chemistry, College of Science, University of Babylon, Hilla 51001, Iraq
| | - Gillian M. Greenway
- Department of Chemistry and Biochemistry, University of Hull, Hull HU6 7RX, UK; (S.S.M.A.-O.); (G.M.G.)
| | - Vesselin N. Paunov
- Department of Chemistry, Nazarbayev University, Kabanbay Batyr Ave. 53, Nursultan 010000, Kazakhstan
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20
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Maghrabia A, Boughdady M, Meshali M. Design and Optimization of New Enteric Nanoparticles of Ceftriaxone for Oral Delivery: In vitro and in vivo Assessments. Int J Nanomedicine 2021; 16:5937-5953. [PMID: 34511899 PMCID: PMC8414076 DOI: 10.2147/ijn.s319176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 08/17/2021] [Indexed: 12/20/2022] Open
Abstract
PURPOSE Development of new strategies for oral delivery of existing antibiotics administered exclusively through intravenous route is one of the global priorities of pharmaceutical research. The encapsulation of these active pharmaceutical agents within nanosized natural products offers several traits due to their tunable surface properties. Ceftriaxone (CTX) is an injectable, third-generation cephalosporin that suffers poor oral bioavailability. METHODS In the present study, ionic gelation of two biopolymers, namely chitosan (CH) and shellac (SH), was implemented to consolidate CTX, within elegant nanoparticles (NPs) for oral administration that would increase its bioavailability and sustainability. Quality by design approach (23 full factorial design) was adopted to optimize CTX-loaded nanoparticles. The optimized formula (F2) was characterized through transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy and differential scanning calorimetry (DSC). In vitro release behavior and stability study were also evaluated. Pharmacokinetic studies of enteric-coated hard gelatin capsules (HGCs) loaded with F2-NPs were finally assessed. RESULTS The optimized spherical F2-NPs had a mean particle size of 258 nm, zeta potential of about +30.1 and appreciable drug entrapment efficiency of 83%. The in vitro drug release profile of F2-NPs in pH 7.4 experienced biphasic configuration with an initial burst release for an hour, followed by a sustained release over 15 h with Higuchi model and non-Fickian diffusion mechanism (R2=0.9852). High stability upon storage at refrigerated and room temperature for 3 months and good flow properties (θ= 32.2 and HR= 1.13) of the optimized formula were also conferred. In vivo pharmacokinetic assessment in rabbits fruitfully displayed 92% absolute bioavailability of CTX. CONCLUSION The obtained results provide evidence for the potential combination of CH and SH in NPs preparation to enhance the oral bioavailability of CTX.
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Affiliation(s)
- Amir Maghrabia
- Department of Pharmacy, Urology and Nephrology Center, Mansoura University, Mansoura, 35516, Egypt
| | - Mariza Boughdady
- Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Mahasen Meshali
- Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
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21
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Abstract
Indomethacin (IND) is one of the supporting drug candidates for colonic targeting but it belongs to BCS class II category presenting a challenge in optimal targeting at the colonic site. To overcome this challenge, we sought to prepare a pH-dependent soluble ternary solid dispersion (SD) of IND of improved solubility and dissolution rate at the colon without the need for a coating. The current study focuses on the preparation of binary SDs of API (IND) with shellac (SSB 55) and Eudragit FS 100 (EFS) and ternary mixtures of IND, SSB 55 together with a new grade of HPMC (A15). Respective SDs were prepared via HME to achieve gastric protection and improved dissolution performance including maintenance of supersaturation. The SDs were characterized and tested for in-vitro dissolution performance using a pH shift dissolution method from 1.1, 5.5, 6.8, and 7.4. A ternary extrudate of IND, SSB 55, and A15 showed improved protection below pH 5.5 with a complete release of 99.5% at pH 7.4 compared to IND neat and binary extrudates from IND-A15, IND-SSB 55, and IND-EFS. It was attributed to an increased level of intermolecular interaction confirmed by ATR-IR and was studied for stability. It was found that in a ternary mixture containing IND, A15 and SSB 55 an increased hydrogen bonding interaction is present, which resulted in improved dissolution performance compared to binary mixtures. Therefore, ternary SDs proved to be a promising concept for future development of colon targeting of poorly soluble drugs.
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Affiliation(s)
- Dnyaneshwar N Kapote
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Bonn, Germany
| | - Karl G Wagner
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Bonn, Germany
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22
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Cho BG, Joshi SR, Lee S, Kim SK, Park YB, Kim GH. Enhanced Mechanical and Antibacterial Properties of Nanocomposites Based on Poly(vinyl Alcohol) and Biopolymer-Derived Reduced Graphene Oxide. Polymers (Basel) 2021; 13:polym13040615. [PMID: 33670700 PMCID: PMC7923123 DOI: 10.3390/polym13040615] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 02/16/2021] [Accepted: 02/16/2021] [Indexed: 11/29/2022] Open
Abstract
Functionalized graphene–polymer nanocomposites have gained significant attention for their enhanced mechanical, thermal, and antibacterial properties, but the requirement of multi-step processes or hazardous reducing agents to functionalize graphene limits their current applications. Here, we present a single-step synthesis of thermally reduced graphene oxide (TrGO) based on shellac, which is a low-cost biopolymer that can be employed to produce poly(vinyl alcohol) (PVA)/TrGO nanocomposites (PVA–TrGO). The concentration of TrGO varied from 0.1 to 2.0 wt.%, and the critical concentration of homogeneous TrGO dispersion was observed to be 1.5 wt.%, below which strong interfacial molecular interactions between the TrGO and the PVA matrix resulted in improved thermal and mechanical properties. At 1.5 wt.% filler loading, the tensile strength and modulus of the PVA–TrGO nanocomposite were increased by 98.7% and 97.4%, respectively, while the storage modulus was increased by 69%. Furthermore, the nanocomposite was 96% more effective in preventing bacterial colonization relative to the neat PVA matrix. The present findings indicate that TrGO can be considered a promising material for potential applications in biomedical devices.
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Affiliation(s)
| | | | | | | | - Young-Bin Park
- Correspondence: (Y.-B.P.); (G.-H.K.); Tel.: +82-52-217-2314 (Y-B.P.); +82-52-217-2413 (G.-H.K.)
| | - Gun-Ho Kim
- Correspondence: (Y.-B.P.); (G.-H.K.); Tel.: +82-52-217-2314 (Y-B.P.); +82-52-217-2413 (G.-H.K.)
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23
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Huang X, Gänzle M, Zhang H, Zhao M, Fang Y, Nishinari K. Microencapsulation of probiotic lactobacilli with shellac as moisture barrier and to allow controlled release. J Sci Food Agric 2021; 101:726-734. [PMID: 32706117 DOI: 10.1002/jsfa.10685] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 07/20/2020] [Accepted: 07/24/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Rapid dissolution in digestive tract and moisture sorption during ambient storage are the two challenges of dry probiotic preparations. To solve these problems, microcapsules with shellac (LAC) addition containing Limosilactobacillus reuteri TMW 1.656 were designed in this work to provide a good moisture barrier and to provide controlled release in digestive tract, based on the hydrophobicity and acid-resistance of LAC. Four microcapsules were prepared using the method of emulsification/external gelation based on the crosslinking reaction between alginate or LAC with calcium ion, including alginate/sucrose (ALG), alginate/shellac/sucrose (ALG/LAC), alginate/whey protein isolate/sucrose (ALG/WPI) and alginate/whey protein isolate/shellac/sucrose (ALG/WPI/LAC). RESULTS Measurements of physical properties showed that microcapsules with LAC addition (ALG/WPI/LAC and ALG/LAC) had larger particle size, much denser structure, lower hygroscopicity and slower solubilization in water, which agreed with the primary microcapsule design. Probiotic survivals in digestive juices followed the order of ALG/WPI/LAC ≥ ALG/WPI ≥ ALG/LAC > ALG. Probiotic stability after heating and ambient storage both exhibited the order of ALG/WPI/LAC > ALG/LAC ≈ ALG/WPI > ALG, which can be explained by the decreased hygroscopicity with adding LAC. CONCLUSION LAC addition contributed to better probiotic survivals after freeze drying, simulated digestion, heating and ambient storage, and whey protein isolate (WPI) addition had a synergistic effect. Microcapsule hygroscopicity was closely related with probiotic survivals after heating and ambient storage, while microcapsule solubilization was closely related with probiotic survivals in simulated juices. Within our knowledge, this is the first report to improve probiotic stability during ambient storage based on LAC hydrophobicity. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Xue Huang
- Glyn O. Phillips Hydrocolloid Research Centre at HUT, Hubei International Scientific and Technological Cooperation Base of Food Hydrocolloids, National '111' Centre for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, China
| | - Michael Gänzle
- Glyn O. Phillips Hydrocolloid Research Centre at HUT, Hubei International Scientific and Technological Cooperation Base of Food Hydrocolloids, National '111' Centre for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, China
- Department of Agricultural, Food, and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada
| | - Hui Zhang
- Glyn O. Phillips Hydrocolloid Research Centre at HUT, Hubei International Scientific and Technological Cooperation Base of Food Hydrocolloids, National '111' Centre for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, China
| | - Meng Zhao
- Glyn O. Phillips Hydrocolloid Research Centre at HUT, Hubei International Scientific and Technological Cooperation Base of Food Hydrocolloids, National '111' Centre for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, China
| | - Yapeng Fang
- Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Katsuyoshi Nishinari
- Glyn O. Phillips Hydrocolloid Research Centre at HUT, Hubei International Scientific and Technological Cooperation Base of Food Hydrocolloids, National '111' Centre for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan, China
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Yan X, Wang L. Preparation of Shellac Resin Microcapsules Coated with Urea Formaldehyde Resin and Properties of Waterborne Paint Films for Tilia amurensis Rupr. Membranes (Basel) 2020; 10:E278. [PMID: 33053636 DOI: 10.3390/membranes10100278] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/05/2020] [Accepted: 10/09/2020] [Indexed: 12/20/2022]
Abstract
A two-step in situ polymerization method was utilized to fabricate urea formaldehyde (UF) resin-coated shellac resin microcapsules. The morphology and composition of microcapsules with different core-wall ratios were analyzed by scanning electron microscope (SEM) and infrared (IR) spectrum. The effects of different concentrations of microcapsules on gloss, color difference, hardness, adhesion, and impact resistance of waterborne paint films were studied. At the same time, the self-healing effect of the prepared microcapsules applied to waterborne paint film was discussed. The results revealed that the shellac resin microcapsules coated with UF resin were successfully prepared. At the 0.67:1 and 0.75:1 core-wall ratios, the color differences of the paint film with 0–20.0% (weight percent) microcapsules were small and the color was uniform. Under the condition of 60° incident angle and the same microcapsule concentration, a good gloss was obtained. When the concentration was 20.0%, the hardness of paint film reached the maximum value. The adhesion of paint film was better, which was not affected by microcapsule concentration. When the concentration was 5.0% and 10.0%, the microstructure of paint film was good. The paint film with a 10.0% concentration of the shellac resin microcapsules coated with UF resin had better self-healing performance and the comprehensive performance was better. This paper provides the basis for the industrial application of self-healing waterborne wood paint films.
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Li K, Luo Q, Xu J, Li K, Zhang W, Liu L, Ma J, Zhang H. A Novel Freeze-Drying-Free Strategy to Fabricate a Biobased Tough Aerogel for Separation of Oil/Water Mixtures. J Agric Food Chem 2020; 68:3779-3785. [PMID: 32142264 DOI: 10.1021/acs.jafc.9b07629] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Renewable biobased porous aerogels with excellent biodegradability have versatile applications in oil/water separation, catalysis, and tissue engineering. However, processing of the porous matrix is challenging due to the high energy consumption and low efficiency from the fabrication procedures, such as freeze-drying or critical-drying of the hydrogel, which need to be improved. In the present study, natural amphiphilic oligomer shellac secreted by the lac Kerriar Lacca insect was employed to fabricate the porous template, which could self-assemble into a continuous rigid network with a hydrophobic core. Because of the hydrophobic core, the hydrated shellac network could be directly dried without collapse by the ambient air. The air-drying shellac aerogel presented a great mechanical property. The silane-coating treatment converted this shellac aerogel into a hydrophobic material that absorbed various organic solvents and oils. Also, this silane-coated shellac aerogel also could remove organic solvent or oil from the bottom or surface of the water. Notably, the saturable aerogel rapidly degraded in pH 14 and released the solvent absorbed by this matrix. This porous and hydrophobic matrix also could be applied as a filter that could connect with a vacuum pump to assemble a device for continuous collecting of oil from water. It also has great potential to be employed as a high-efficiency strategy to treat large scale oil spill issues. A new porous template composed of natural resin secreted by the insect was fabricated, and the whole fabrication process was green, low-cost, and energy saving. The surface of this template could be modified further to effectuate other processes, such as catalysis, heavy metal absorption, and tissue proliferation.
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Affiliation(s)
- Kai Li
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, People's Republic of China
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650550, People's Republic of China
| | - Qingming Luo
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, People's Republic of China
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650550, People's Republic of China
- College of Mobile Telecommunications, Chongqing University of Posts and Telecommunications, Chongqing 314000, People's Republic of China
| | - Juan Xu
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, People's Republic of China
| | - Kun Li
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, People's Republic of China
| | - Wenwen Zhang
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, People's Republic of China
| | - Lanxiang Liu
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, People's Republic of China
| | - Jinju Ma
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, People's Republic of China
| | - Hong Zhang
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, People's Republic of China
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Maghrabia AE, Boughdady MF, Meshali MM. New Perspective Enteric-Coated Tablet Dosage Form for Oral Administration of Ceftriaxone: In Vitro and In Vivo Assessments. AAPS PharmSciTech 2019; 20:306. [PMID: 31512022 DOI: 10.1208/s12249-019-1512-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/14/2019] [Indexed: 12/23/2022] Open
Abstract
Ceftriaxone (CTX) is a widely used injectable third-generation cephalosporin that exhibits broad-spectrum antibacterial activity. Unfortunately, the oral route of this drug suffers different encumbrances, such as instability in the upper part of the GIT and enzymatic degradation, as well as poor permeability. There is no reported tablet dosage form for this drug. In this respect, the authors investigated the possibility of developing an enteric-coated oral tablet of CTX that would be helpful for better patient compliance. The tablet consists of directly compressed core of CTX, citric acid (CA), sodium chloride (NaCl), and two biopolymers-chitosan (CH), a permeation enhancer, and silicified microcrystalline cellulose (SMCC), a wicking agent. Both biopolymers are naturally occurring polysaccharides that are biodegradable in the colon and able to incorporate acid labile drugs. CA is a pH modulator to protect CTX from protease enzymes, while NaCl is a translocation enhancer that helps drug penetration. The enteric coat of the core was shellac (SH) with plasticizer glycerol tristearate (GTS) and CA that was applied by direct compression (dry coating). The solventless heat curable coat resulted in an enteric-coated tablet that complies with the USP pharmacopeia. The optimized formula was further subjected to in vitro release and stability studies, as well as ingredient compatibility. In vivo oral bioavailability of the enteric-coated tablets in rabbits gave promising results (absolute bioavailability of about 80%). Synergistically, all ingredients together augmented oral bioavailability of CTX. This developed formula could be a perspective delivery system for those drugs intended to be absorbed from the colon such as peptides and peptide-like drugs.
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Gao J, Li K, Xu J, Zhang W, Ma J, Liu L, Sun Y, Zhang H, Li K. Unexpected Rheological Behavior of a Hydrophobic Associative Shellac-Based Oligomeric Food Thickener. J Agric Food Chem 2018; 66:6799-6805. [PMID: 29878772 DOI: 10.1021/acs.jafc.8b01148] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Sodium shellac constituted of a "surfactant" monomer, which is sensitive to shear stress, exhibits shear-thickening behavior at a low concentration (5 wt %), and reacts with H+ to retain transient high viscosity under shear, is introduced in this study. The steady shear flow test proved that, under a high shear rate, sodium shellac suspension could change from Newtonian fluid to continuous shear-thickening non-Newtonian fluid. The dynamic oscillation test suggested that the sodium shellac solution at low concentrations (0.1 and 1 wt %) under a low shear rate behaved as the viscous fluid ( G″ > G'), and the solution at high concentrations (5, 10, and 15 wt %) behaved as the elastic fluid ( G″ < G'). Moreover, a high shear rate caused a cross-linking point between the G″ and G' curve. At a low concentration, it could be the sol-gel point. At a high concentration, it could be the gel-sol point. All of these transforming points were related to the interaction between the sodium clusters. This interaction should be the hydrophobic association between the particles. To prove the assumption, hydrophilic polymer poly(ethylene oxide) (PEO) was employed as the disrupting factor to the hydrophobic association. As expected, the shear-thickening behavior vanished after mixing with PEO, which verified our assumption. On the other hand, the high viscosity of the suspension under shear could be retained by reaction with H+ to solidify the transient hydroclusters under shear. Meanwhile, sodium shellac had great potential as the functional shear thickener, which could modify the rheological property of the polymer with carboxyl groups, e.g., pectin, alginate, or poly(acrylic acid). Thus, this natural and green thicker has great potential in food, medical gel, green adhesive, or cosmetic products.
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Affiliation(s)
- Jianan Gao
- Research Institute of Resources Insects , Chinese Academy of Forestry , Kunming , Yunnan 650224 , People's Republic of China
- Faculty of Chemical Engineering and Technology , Kunming University of Science and Technology , Kunming , Yunnan 650224 , People's Republic of China
| | - Kun Li
- Research Institute of Resources Insects , Chinese Academy of Forestry , Kunming , Yunnan 650224 , People's Republic of China
| | - Juan Xu
- Research Institute of Resources Insects , Chinese Academy of Forestry , Kunming , Yunnan 650224 , People's Republic of China
| | - Wenwen Zhang
- Research Institute of Resources Insects , Chinese Academy of Forestry , Kunming , Yunnan 650224 , People's Republic of China
| | - Jinju Ma
- Research Institute of Resources Insects , Chinese Academy of Forestry , Kunming , Yunnan 650224 , People's Republic of China
| | - Lanxiang Liu
- Research Institute of Resources Insects , Chinese Academy of Forestry , Kunming , Yunnan 650224 , People's Republic of China
| | - Yanlin Sun
- Faculty of Chemical Engineering and Technology , Kunming University of Science and Technology , Kunming , Yunnan 650224 , People's Republic of China
| | - Hong Zhang
- Research Institute of Resources Insects , Chinese Academy of Forestry , Kunming , Yunnan 650224 , People's Republic of China
| | - Kai Li
- Research Institute of Resources Insects , Chinese Academy of Forestry , Kunming , Yunnan 650224 , People's Republic of China
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Gately NM, Kennedy JE. The Development of a Melt-Extruded Shellac Carrier for the Targeted Delivery of Probiotics to the Colon. Pharmaceutics 2017; 9:E38. [PMID: 28937621 DOI: 10.3390/pharmaceutics9040038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/14/2017] [Accepted: 09/17/2017] [Indexed: 01/30/2023] Open
Abstract
Hot melt extrusion (HME) is considered an efficient technique in developing solid molecular dispersions, and has been demonstrated to provide sustained, modified and targeted drug delivery resulting in improved bioavailability. However, most commercial enteric or pH-responsive polymers are relatively difficult to process or have high Glass Transition Temperature (Tg) values, making their use with temperature-sensitive drugs, probiotics or biologics not viable. Shellac is a natural thermoplastic, and after a review of current literature on the pharmaceutical HME process, a possible gap in the knowledge of the use of shellac to produce dosage forms by means of HME was identified. This work explores the possibility of SSB® 55 pharmaceutical-grade shellac as a melt-extrudable encapsulation polymer to entrap freeze-dried probiotic powder and to determine bacterial cell viability post-processing. Well-defined strands were produced from the physical mixture of shellac and Biocare® Bifidobacterium Probiotic. FTIR clarified that there are no significant interactions between the probiotic and polymer. All of the samples demonstrated less than 5% degradation over 24 h at pH of both 1.2 and 6.8. At pH 7.4, both loaded samples gave a similar dissolution trend with complete degradation achieved after 10–11 h. Following five-month storage, 57.8% reduction in viability was observed.
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29
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González-Villanueva I, Hispán Ocete P, Silvestre Salvador JF. Allergic contact dermatitis caused by a black tattoo ink in a patient allergic to shellac. Contact Dermatitis 2017; 75:247-8. [PMID: 27620123 DOI: 10.1111/cod.12611] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 04/12/2016] [Indexed: 12/01/2022]
Affiliation(s)
- Iris González-Villanueva
- Department of Dermatology, Cutaneous Allergy Unit, Hospital General Universitario de Alicante, 03010, Alicante, Spain.
| | - Patricia Hispán Ocete
- Department of Dermatology, Cutaneous Allergy Unit, Hospital General Universitario de Alicante, 03010, Alicante, Spain
| | - Juan F Silvestre Salvador
- Department of Dermatology, Cutaneous Allergy Unit, Hospital General Universitario de Alicante, 03010, Alicante, Spain
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Luo Q, Li K, Xu J, Li K, Zheng H, Liu L, Zhang H, Sun Y. Novel Biobased Sodium Shellac for Wrapping Disperse Multiscale Emulsion Particles. J Agric Food Chem 2016; 64:9374-9380. [PMID: 27960293 DOI: 10.1021/acs.jafc.6b04417] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
As a result of amphipathic oligomers driven by different forces including hydrophobic interaction, electrostatic interaction, H-bond, and heat, multiscale emulsion particles can be wrapped. In this paper we attempted to use sodium shellac as a novel biobased wrapping material. The H+, Ca+, and spray-drying methods were employed to solidify the complex vitamin E (VE) emulsion with sodium shellac to fabricate the beads. The VE loading and encapsulation efficiency were used to evaluate the wrapping process. The results show that the microscale VE emulsion particles could easily be wrapped by these three means. However, due to the high solid content of the nanoscale emulsion particles, it was difficult to wrap them by spray-drying method. The beads solidified by H+ had higher VE loading and encapsulation efficiency than those solidified by other methods and even grabbed the hydrophobic molecule VE from the emulsion micelles. At an RVS of 1:4, these two parameters, which are obtained by the nanoscale emulsion particle wrapping process, could reach 18.9 and 64.3% supported by the single driving force of hydrophobic interaction. Above all, this research introduced a novel wrapping material driven by different forces that can aggregate and wrap the emulsion micelles. It can be widely used in the medical, food, and cosmetics industries.
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Affiliation(s)
- Qingming Luo
- School of Chemical Engineering, Kunming University of Science and Technology , Kunming 650224, People's Republic of China
- Research Institute of Resources Insects, Chinese Academy of Forestry , Kunming 650224, People's Republic of China
| | - Kai Li
- Research Institute of Resources Insects, Chinese Academy of Forestry , Kunming 650224, People's Republic of China
| | - Juan Xu
- Research Institute of Resources Insects, Chinese Academy of Forestry , Kunming 650224, People's Republic of China
| | - Kun Li
- Research Institute of Resources Insects, Chinese Academy of Forestry , Kunming 650224, People's Republic of China
| | - Hua Zheng
- Research Institute of Resources Insects, Chinese Academy of Forestry , Kunming 650224, People's Republic of China
| | - Lanxiang Liu
- Research Institute of Resources Insects, Chinese Academy of Forestry , Kunming 650224, People's Republic of China
| | - Hong Zhang
- Research Institute of Resources Insects, Chinese Academy of Forestry , Kunming 650224, People's Republic of China
| | - Yanlin Sun
- School of Chemical Engineering, Kunming University of Science and Technology , Kunming 650224, People's Republic of China
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Bellan LM, Pearsall M, Cropek DM, Langer R. A 3D interconnected microchannel network formed in gelatin by sacrificial shellac microfibers. Adv Mater 2012; 24:5187-91. [PMID: 22826135 PMCID: PMC3458513 DOI: 10.1002/adma.201200810] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Revised: 05/10/2012] [Indexed: 05/18/2023]
Abstract
3D microfluidic networks are fabricated in a gelatin hydrogel using sacrificial melt-spun microfibers made from a material with pH-dependent solubility. The fibers, after being embedded within the gel, can be removed by changing the gel pH to induce dissolution. This process is performed in an entirely aqueous environment, avoiding extreme temperatures, low pressures, and toxic organic solvents.
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Affiliation(s)
- Leon M Bellan
- MIT, 77 Massachusetts Avenue, The David H. Koch Institute, Room 76-661, Cambridge, MA 02139-4307, USA.
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