1
|
Tao H, Fang XH, Chen P, Yang BQ, Feng R, Zhang B. Casein/butyrylated dextrin nanoparticles and chitosan stabilized bilayer emulsions as fat substitutes in sponge cakes. Food Chem 2024; 448:139043. [PMID: 38552463 DOI: 10.1016/j.foodchem.2024.139043] [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] [Received: 06/07/2023] [Revised: 03/01/2024] [Accepted: 03/13/2024] [Indexed: 04/24/2024]
Abstract
This study aimed to evaluate the potential of the bilayer emulsions stabilized with casein/butyrylated dextrin nanoparticles and chitosan as fat substitutes in preparing low-calorie sponge cakes. Among the different cake groups, the substitution of bilayer emulsions at 60% exhibited comparable baking properties, appearance, texture characteristics and stable secondary structure to fat. The specific volume and height were increased by 36.94% and 22%, respectively, while the cake showed higher lightness (L*) in the cores and softer hardness in the crumb. In addition, the moisture content of cakes was increased while the water activity remained unchanged. These results showed that casein/butyrylated dextrin bilayer emulsion was a potential fat substitute for cake products at the ratio of 60% with the desirable characteristics.
Collapse
Affiliation(s)
- Han Tao
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China
| | - Xiao-Han Fang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China
| | - Pin Chen
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China
| | - Bao-Qiu Yang
- Xinjiang Production & Construction Group Key Laboratory of Agricultural Products Processing in Xinjiang South, College of Food Science and Engineering, Tarim University, Alar 843300, Xinjiang Province, PR China
| | - Ran Feng
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China
| | - Bao Zhang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China.
| |
Collapse
|
2
|
Alawadi M, Fakhari AR, Maghsoudi M, Nojavan S. Dextrin-assisted gel electromembrane extraction of chiral drugs: Improving the extraction efficiency and investigation of enantioselectivity of extraction. Talanta 2024; 274:126016. [PMID: 38599118 DOI: 10.1016/j.talanta.2024.126016] [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] [Received: 11/11/2023] [Revised: 03/27/2024] [Accepted: 03/29/2024] [Indexed: 04/12/2024]
Abstract
The present study investigates the use of dextrins (maltodextrin, β-cyclodextrin, and hydroxypropyl-β-cyclodextrin) to improve the efficiency of the agarose-based gel electromembrane extraction technique for extracting chiral basic drugs (citalopram, hydroxyzine, and cetirizine). Additionally, it examines the enantioselectivity of the extraction process for these drugs. To achieve these, dextrins were incorporated into either the sample solution, the membrane, or the acceptor solution, and then the extraction procedure was performed. Enantiomers were separated and analyzed using a capillary electrophoresis device equipped with a UV detector. The results obtained under the optimal extraction conditions (sample solution pH: 4.0, acceptor solution pH: 2.0, gel membrane pH: 3.0, agarose concentration: 3 % w/v, stirring rate: 1000 rpm, gel thickness: 4.4 mm, extraction voltage: 62.3 V, and extraction time: 32.1 min) indicated that incorporating dextrins into either the sample solution, membrane or the acceptor solution enhances extraction efficiency by 17.3-23.1 %. The most significant increase was observed when hydroxypropyl-β-cyclodextrin was added to the acceptor solution. The findings indicated that the inclusion of hydroxypropyl-β-cyclodextrin in the sample solution resulted in an enantioselective extraction, yielding an enantiomeric excess of 6.42-7.14 %. The proposed method showed a linear range of 5.0-2000 ng/mL for enantiomers of model drugs. The limit of detection and limit of quantification for all enantiomers were found to be < 4.5 ng/mL and <15.0 ng/mL, respectively. Intra- and inter-day RSDs (n = 4) were less than 10.8 %, and the relative errors were less than 3.2 % for all the enantiomers. Finally, the developed method was successfully applied to determine concentrations of enantiomers in a urine sample with relative recoveries of 96.8-99.2 %, indicating good reliability of the developed method.
Collapse
Affiliation(s)
- Mustafa Alawadi
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, Tehran, Iran
| | - Ali Reza Fakhari
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, Tehran, Iran.
| | - Majid Maghsoudi
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, Tehran, Iran
| | - Saeed Nojavan
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, Tehran, Iran.
| |
Collapse
|
3
|
Meng R, Chen P, Feng R, Tao H, Zhang B, Su DL. Interfacial engineering method to regulate the performances of bilayer emulsions co-stabilized by casein/butyrylated dextrin nanoparticles and chitosan. Int J Biol Macromol 2024; 266:131160. [PMID: 38547946 DOI: 10.1016/j.ijbiomac.2024.131160] [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] [Received: 11/26/2023] [Revised: 03/15/2024] [Accepted: 03/25/2024] [Indexed: 04/01/2024]
Abstract
In present study, bilayer emulsions with different interfacial structures stabilized by casein/butyrylated dextrin nanoparticles (CDNP), chitosan (CS) and chitosan nanoparticles (CSNP) were prepared to overcome the limitations of conventional emulsions. The effects of chitosan morphology and incorporation sequences on the bilayer emulsions were examined. Bilayer emulsions prepared with CDNP as the inner layer and CS/CSNP as the outer layer were observed to have smaller droplet sizes (1.39 ± 86.74 um and 1.45 ± 7.87 um). Bilayer emulsions prepared with CDNP as the inner layer and CS as the outer layer exhibited the lowest creaming index (2.38 %) after 14 days of storage, indicating excellent stability. Furthermore, bilayer emulsion prepared with CDNP as the inner layer and CS as the outer layer also exhibited a uniform water distribution, excellent protein oxidative stability, and uniformly distributed droplets by the measurement of Low-field NMR, intrinsic tryptophan fluorescence and laser confocal laser scanning microscopy. These results indicated that the study provided a theoretical basis for the development and design of bilayer emulsions with different interfacial structures. This study also provides a new material for the preparation of delivery systems that protect biologically active compounds. Bilayer emulsions are promising for applications in traditional and manufactured food products.
Collapse
Affiliation(s)
- Ran Meng
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China
| | - Pin Chen
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China
| | - Ran Feng
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China
| | - Han Tao
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China.
| | - Bao Zhang
- Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China; School of Food and Biological Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, Anhui 230009, PR China
| | - Dong-Lin Su
- Hunan Agricultural Product Processing Institute, Hunan Academy of Agricultural Sciences, Changsha, PR China.
| |
Collapse
|
4
|
Li F, Muhmood A, Akhter M, Gao X, Sun J, Du Z, Wei Y, Zhang T, Wei Y. Characterization, health benefits, and food applications of enzymatic digestion- resistant dextrin: A review. Int J Biol Macromol 2023; 253:126970. [PMID: 37730002 DOI: 10.1016/j.ijbiomac.2023.126970] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/19/2023] [Accepted: 09/15/2023] [Indexed: 09/22/2023]
Abstract
Resistant dextrin or resistant maltodextrin (RD), a short-chain glucose polymer that is highly resistant to hydrolysis by human digestive enzymes, has shown broad developmental prospects in the food industry and has gained substantial attention owing to its lack of undesirable effects on the sensory features of food or the digestive system. However, comprehensive fundamental and application information on RD and how RD improves anti-diabetes and obesity have not yet been received. Therefore, the characterization, health benefits and application of RD in various fields are summarized and discussed in the current study. Typically, RD is prepared by the acid thermal method and possesses excellent physicochemical properties, including low viscosity, high solubility, storage stability, and low retro-gradation, which are correlated with its low molecular weight (Mw) and non-digestible glycosidic linkages. In contrast, RD prepared by the simultaneous debranching and crystallization method has low solubility and high crystallinity. The ingestion of RD can positively affect metabolic diseases (diabetes and obesity) in animals and humans by producing short-chain fatty acids (SCFAs), and facilitating the inflammatory response. Moreover, RD has been widely used in the beverage, dairy products, and dessert industries due to its nutritional value and textural properties without unacceptable quality loss. More studies are required to further explore RD application potential in the food industry and its role in the management of different chronic metabolic disorders.
Collapse
Affiliation(s)
- Fei Li
- College of Life Science, Qingdao University, Qingdao 266071, China; Shandong Luhua Group Co., Ltd., Laiyang 265200, China
| | - Atif Muhmood
- Department of Agroecology, Aarhus University, Denmark.
| | - Muhammad Akhter
- College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
| | - Xiang Gao
- College of Life Science, Qingdao University, Qingdao 266071, China; Shandong Huatao Food Co., Ltd., Weifang 262100, China.
| | - Jie Sun
- College of Life Science, Qingdao University, Qingdao 266071, China
| | - Zubo Du
- Shandong Luhua Group Co., Ltd., Laiyang 265200, China.
| | - Yuxi Wei
- College of Life Science, Qingdao University, Qingdao 266071, China.
| | - Ting Zhang
- Henan University of Technology, Grain College, Zhengzhou 450000, China
| | - Yunlu Wei
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
| |
Collapse
|
5
|
Kapusniak Jochym K, Wojcik M, Wrobel K, Rosicka-Kaczmarek J, Kapusniak J. Assessment of physicochemical and thermal properties of soluble dextrin fiber from potato starch for use in fruit mousses. J Sci Food Agric 2021; 101:4125-4133. [PMID: 33368353 DOI: 10.1002/jsfa.11048] [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] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 11/20/2020] [Accepted: 12/26/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Fruit mousses are products with a relatively low amount of dietary fiber in a single portion, but with additional portions of soluble fiber they may be good alternative to fiber-rich snacks as take-away food. In the present study, the properties of new soluble dextrin fiber (SDexF) from potato starch were assessed to establish whether it could be used to enrich fruit mousses. The properties of SDexF that can affect processing and storage stability of enriched mousses were studied and compared with those of native potato starch and semiproducts (resulting from various drying temperatures). The effect of the addition of SDexF on the pasting properties of mousse was also analyzed. RESULTS The application of food-grade hydrochloric and citric acids as catalysts in the dextrinization of food-grade potato starch allowed to SDexF to be obtained. Despite the differences in characteristics of the semiproducts, the final SDexF preparations were very similar in the meaning of solubility, dextrose equivalent (DE), retrogradation, and pasting properties. SDexF preparations were characterized by a significantly lower retrogradation tendency, peak viscosity, final viscosity, and gelatinization enthalpy in comparison with both native starch and semiproducts. Soluble dextrin fiber was successfully added to banana-apple mousse. The addition of SDexF to mousse did not cause any undesirable changes to the viscosity of the product, and surprisingly even resulted in mousse with lower viscosity. Turbidity and RVA studies revealed that SDexF was stable and retrogradation processes can be negligible during storage. CONCLUSION The SDexF obtained from potato starch can be a novel functional substance to increase the dietary fiber content of fruit or fruit and vegetable mousses. © 2020 Society of Chemical Industry.
Collapse
Affiliation(s)
- Kamila Kapusniak Jochym
- Department of Dietetics and Food Studies, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Czestochowa, Poland
| | - Malwina Wojcik
- Department of Dietetics and Food Studies, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Czestochowa, Poland
| | - Karolina Wrobel
- Department of Dietetics and Food Studies, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Czestochowa, Poland
| | - Justyna Rosicka-Kaczmarek
- Institute of Food Technology and Analysis, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Lodz, Poland
| | - Janusz Kapusniak
- Department of Dietetics and Food Studies, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Czestochowa, Poland
| |
Collapse
|
6
|
Chiron E, Varache M, Stokniene J, Thomas DW, Ferguson EL. A physicochemical assessment of the thermal stability of dextrin-colistin conjugates. Sci Rep 2021; 11:10600. [PMID: 34011987 PMCID: PMC8134461 DOI: 10.1038/s41598-021-89946-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/04/2021] [Indexed: 11/25/2022] Open
Abstract
Attachment of polysaccharide carriers is increasingly being used to achieve precision delivery and improved effectiveness of protein and peptide drugs. Although it is clear that their clinical effectiveness relies on the purity and integrity of the conjugate in storage, as well as following administration, instability of polysaccharide-based conjugates can reduce the protective efficacy of the polymer, which may adversely affect the bioactive's potency. As a model, these studies used dextrin-colistin conjugates, with varying degrees of polymer modification (1, 2.5 and 7.5 mol% succinoylation) to assess the effect of storage temperature (- 20, 4, 21 and 37 °C) and duration (up to 12 months) on saccharide and colistin release and antimicrobial activity. Estimation of the proportion of saccharide release (by comparison of area under the curve from size exclusion chromatograms) was more pronounced at higher temperatures (up to 3 and 35% at - 20 °C and 37 °C, respectively after 12 months), however, repeated freeze-thaw did not produce any measurable release of saccharides, while addition of amylase (20, 100, 500 IU/L) caused rapid release of saccharides (> 70% total within 24 h). At all temperatures, conjugates containing the lowest degree of succinoylation released the highest proportion of free colistin, which increased with storage temperature, however no trend in saccharide release was observed. Despite the clear physical effects of prolonged storage, antimicrobial activity of all samples was only altered after storage at 37 °C for 12 months (> threefold decreased activity). These results demonstrate significant release of saccharides from dextrin-colistin conjugates during prolonged storage in buffered solution, especially at elevated temperature, which, in most cases, did not affect antimicrobial activity. These findings provide vital information about the structure-activity relationship of dextrin-colistin conjugates, prior to full-scale commercial development, which can subsequently be applied to other polysaccharide-protein and -peptide conjugates.
Collapse
Affiliation(s)
- Emilie Chiron
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK
| | - Mathieu Varache
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK
- CNRS, Ingénierie Des Matériaux Polymères, IMP UMR CNRS 5223, Université de Lyon, Université Claude Bernard Lyon 1, 15 bd A. Latarjet, 69622, Villeurbanne, France
| | - Joana Stokniene
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK
| | - David W Thomas
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK
| | - Elaine L Ferguson
- Advanced Therapies Group, Oral and Biomedical Sciences, School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Heath Park, Cardiff, CF14 4XY, UK.
| |
Collapse
|
7
|
Shukla A, Singh AP, Maiti P. Injectable hydrogels of newly designed brush biopolymers as sustained drug-delivery vehicle for melanoma treatment. Signal Transduct Target Ther 2021; 6:63. [PMID: 33589586 PMCID: PMC7884735 DOI: 10.1038/s41392-020-00431-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 05/25/2020] [Revised: 09/27/2020] [Accepted: 10/26/2020] [Indexed: 11/09/2022] Open
Abstract
Novel biocompatible and brush copolymers have been developed for cancer treatment using its controlled drug-release potential. Polyurethane graft on linear dextrin has been synthesized to control the hydrophilic-hydrophobic balance for regulated drug delivery. The properties of the graft copolymers have been tuned through graft density. The prepared grafts are thermally stable and mechanically strong. An injectable hydrogel has been developed by embedding the drug-loaded brush copolymers in methyl cellulose to better control the release for a prolonged period, importantly by keeping the drug release at a constant rate. Cellular studies indicate the biocompatible nature of the brush copolymers whose controlled and slow release of drug exhibit significant cytotoxic effects on cancer cells. Endocytosis of drug tagged contrast agent indicates greater transport of biologically active material inside cell as observed through cellular uptake studies. In vivo studies on melanoma mice exhibit the real efficacy of the controlled drug release from the injectable hydrogel with significant melanoma suppression without any side effects as opposed to severe toxic effects observed in conventional chemotherapy. Special application method of drug-loaded hydrogel just beneath the tumor makes this system incredibly effective through confinement. Thus, brush copolymer injectable hydrogel is a promising vehicle for control release of drug for cancer treatment in future.
Collapse
Affiliation(s)
- Aparna Shukla
- School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi, 221005, India
| | - Akhand Pratap Singh
- School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi, 221005, India
| | - Pralay Maiti
- School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi, 221005, India.
| |
Collapse
|
8
|
Abstract
In this work, spiral dextrin/resveratrol (SD/Res) crystal, a new colon-specific drug-delivery system, was established by a novel method of encapsulation and cocrystallization to improve the antidigestion ability compared with the SD/Res inclusion complex (SD/Res IC) prepared by encapsulation and coprecipitation. X-ray diffraction (XRD) and scanning electron microscopy (SEM) revealed that the SD/Res crystal formed a more regular and perfect crystallite than SD/Res IC. Moreover, the encapsulation ability and thermostability of the SD/Res crystal were enhanced as the chain length of SD was increased. In vitro digestion indicated that SD/Res IC merely achieved small intestine-targeted release of resveratrol, while the SD/Res crystal could act as a colon-specific delivery system to protect resveratrol from degradation by gastric acid and pancreatic enzymes. The SD-1/Res crystal presented much higher thermal stability and stronger gastrointestinal stability than other SD/Res crystals and SD/Res ICs, which facilitated its application as a novel colon-target delivery system for resveratrol.
Collapse
Affiliation(s)
- Ping-Ping Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Zhi-Gang Luo
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- South China Institute of Collaborative Innovation, Dongguan 523808, China
- Food Nutrition and Human Health Overseas Expertise Introduction Center for Discipline Innovation (111 Center), Guangzhou 510640, China
| | - Tamer Mahmoud Tamer
- Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City 21934, Egypt
| |
Collapse
|
9
|
Phillips J, Venter JL, Atanasova M, Wesley-Smith J, Oosthuizen H, Emmambux MN, Du Toit EL, Focke WW. Dextrin Nanocomposites as Matrices for Solid Dosage Forms. ACS Appl Mater Interfaces 2020; 12:16969-16977. [PMID: 32191427 DOI: 10.1021/acsami.0c02061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/10/2023]
Abstract
Safe application of water-insoluble acaricides requires fast release from solid dosage systems into aquatic environments. Dextrin is a water-soluble form of partially hydrolyzed starch, which may be used as matrix material for these systems if retrogradation can be inhibited by the inclusion of nanofillers. Several glycerol-plasticized thermoplastic dextrin-based nanocomposites were prepared with a twin-screw extrusion-compounding process. The nanofillers included a layered double hydroxide (LDH), cellulose nanofibers (CNF), and stearic acid. The time-dependent retrogradation of the compounds was monitored by X-ray diffraction (XRD) and dynamic mechanical thermal analysis (DMA). XRD showed that composite samples that included stearic acid in the formulation led to the formation of an amylose-lipid complex and a stable crystallinity during aging. The most promising nanocomposite included both stearic acid and CNF. It was selected as the carrier material for the water-insoluble acaricide Amitraz. Fast release rates were observed for composites containing 5, 10, and 20% (w/w) of the pesticide. A significant reduction in the particle size of the released Amitraz powder was observed, which is ascribed to the high-temperature compounding procedure.
Collapse
Affiliation(s)
- Justin Phillips
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - Jaco-Louis Venter
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - Maria Atanasova
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - James Wesley-Smith
- Sefako Makgatho Health Sciences University, Ga-Rankuwa 0208,South Africa
| | - Hester Oosthuizen
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - M Naushad Emmambux
- Department of Consumer and Food Sciences, University of Pretoria, Private Bag X20, Hatfield, Pretoria0028, South Africa
| | - Elizabeth L Du Toit
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - Walter W Focke
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| |
Collapse
|
10
|
Pan Y, Li XM, Meng R, Zhang B. Exploration of the Stabilization Mechanism and Curcumin Bioaccessibility of Emulsions Stabilized by Whey Protein Hydrolysates after Succinylation and Glycation in Different Orders. J Agric Food Chem 2020; 68:623-632. [PMID: 31846317 DOI: 10.1021/acs.jafc.9b07350] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [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: 06/10/2023]
Abstract
The combined effects of succinic anhydride (SA) succinylation and linear dextrin (LD) glycation on whey protein hydrolysates (WPH) and their stabilized emulsions were evaluated. Degree of succinylation (DS), degree of glycation (DG), and degree of browning of samples suggested that a competitive displacement of reactive groups existed when WPH reacted with SA and LD in different orders. Attenuated total reflection Fourier transform infrared (ATR-FTIR) and far-UV circular dichroism (CD) indicated that the order of modification methods had a significant effect on secondary structures of WPH. Succinylation combined with glycation effectively reduced the surface hydrophobicity and increased the molecular flexibility of WPH. Meanwhile, the total free -SH content decreased, and the exposed free -SH content increased. Results of storage stability and gastrointestinal fate of the curcumin-loaded emulsion revealed that the modified WPH with higher DS was more effective for improving the curcumin bioaccessibility, while that with higher DG was more effective for enhancing the stability of the emulsion.
Collapse
Affiliation(s)
- Yi Pan
- Engineering Research Center of Bio-process, Ministry of Education , Hefei University of Technology , 193 Tunxi Road , Hefei , Anhui 230009 , P. R. China
- School of Food and Biological Engineering , Hefei University of Technology , 193 Tunxi Road , Hefei , Anhui 230009 , P. R. China
| | - Xiao-Min Li
- Engineering Research Center of Bio-process, Ministry of Education , Hefei University of Technology , 193 Tunxi Road , Hefei , Anhui 230009 , P. R. China
- School of Food and Biological Engineering , Hefei University of Technology , 193 Tunxi Road , Hefei , Anhui 230009 , P. R. China
| | - Ran Meng
- Engineering Research Center of Bio-process, Ministry of Education , Hefei University of Technology , 193 Tunxi Road , Hefei , Anhui 230009 , P. R. China
- School of Food and Biological Engineering , Hefei University of Technology , 193 Tunxi Road , Hefei , Anhui 230009 , P. R. China
| | - Bao Zhang
- Engineering Research Center of Bio-process, Ministry of Education , Hefei University of Technology , 193 Tunxi Road , Hefei , Anhui 230009 , P. R. China
- School of Food and Biological Engineering , Hefei University of Technology , 193 Tunxi Road , Hefei , Anhui 230009 , P. R. China
| |
Collapse
|
11
|
Maimaitizi H, Kadeer K, Reheman A, Talifu D, Tursun Y, Abulizi A. One-pot sonochemical synthesis of 3D flower-like hierarchical AgCl microsphere with enhanced photocatalytic activity. Environ Sci Pollut Res Int 2019; 26:26883-26892. [PMID: 31302891 DOI: 10.1007/s11356-019-05371-z] [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] [Received: 11/09/2018] [Accepted: 05/03/2019] [Indexed: 06/10/2023]
Abstract
A highly uniform 3D flower-like hierarchical AgCl microsphere was prepared by sonochemical method with the existence of β-dextrin. The 3D flower-like hierarchical structure can be ascribed to the existence of β-dextrin, which provides nucleation sites for the growth of nanosheets because of the strong interaction between β-dextrin and Ag+. The 3D flower-like hierarchical AgCl microspheres were assembled by numerous interleaving nanosheet petals with small thickness. Benefiting from the unique structural features, the as-prepared 3D flower-like hierarchical AgCl microsphere exhibited higher degradation efficiency with degrading 98.17% of methylene blue (MB) and 88.50% of tetracycline (TC) within 40 min, which were both remarkably higher than those of irregular AgCl under visible light irradiation. Besides, the photocatalytic degradation rate constant of 3D flower-like hierarchical AgCl microsphere (0.063 min-1) for MB was 3.94 times higher than that of irregular AgCl (0.016 min-1). Moreover, a possible mechanism for the formation and excellent photocatalytic performance of 3D flower-like hierarchical AgCl microsphere was also proposed.
Collapse
Affiliation(s)
- Hujiabudula Maimaitizi
- Key Laboratory of Coal Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Shengli Road No.666, Tianshan District, Urumqi, 830046, Xinjiang, People's Republic of China
| | - Kuerbangnisha Kadeer
- Key Laboratory of Coal Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Shengli Road No.666, Tianshan District, Urumqi, 830046, Xinjiang, People's Republic of China
| | - Abulajiang Reheman
- Key Laboratory of Coal Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Shengli Road No.666, Tianshan District, Urumqi, 830046, Xinjiang, People's Republic of China
| | - Dilinuer Talifu
- Key Laboratory of Coal Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Shengli Road No.666, Tianshan District, Urumqi, 830046, Xinjiang, People's Republic of China
| | - Yalkunjan Tursun
- Key Laboratory of Coal Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Shengli Road No.666, Tianshan District, Urumqi, 830046, Xinjiang, People's Republic of China
| | - Abulikemu Abulizi
- Key Laboratory of Coal Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Shengli Road No.666, Tianshan District, Urumqi, 830046, Xinjiang, People's Republic of China.
| |
Collapse
|
12
|
Fakhrullina G, Khakimova E, Akhatova F, Lazzara G, Parisi F, Fakhrullin R. Selective Antimicrobial Effects of Curcumin@Halloysite Nanoformulation: A Caenorhabditis elegans Study. ACS Appl Mater Interfaces 2019; 11:23050-23064. [PMID: 31180643 DOI: 10.1021/acsami.9b07499] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [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: 06/09/2023]
Abstract
Alterations in the normal gastrointestinal microbial community caused by unhealthy diet, environmental factors, and antibiotic overuse may severely affect human health and well-being. Novel antimicrobial drug formulations targeting pathogenic microflora while not affecting or even supporting symbiotic microflora are urgently needed. Here we report fabrication of a novel antimicrobial nanocontainer based on halloysite nanotubes loaded with curcumin and protected with a dextrin outer layer (HNTs+Curc/DX) and its effective use to suppress the overgrowth of pathogenic bacteria in Caenorhabditis elegans nematodes. Nanocontainers have been obtained using vacuum-facilitated loading of hydrophobic curcumin into halloysite lumens. We have applied UV-vis and infrared spectroscopy, thermogravimetry and microscopy to characterize the HNTs+Curc/DX nanocontainers. In experiments in vitro we found that HNTs+Curc/DX effectively suppressed the growth of Serratia marcescens cells, whereas Escherichia coli bacteria were not affected. We applied HNTs+Curc/DX nanocontainers to alleviate the S. marcescens infection in C. elegans nematodes in vivo. The nematodes ingest HNTs+Curc/DX at 4-6 ng per worm, which results in improvement of the nematodes' fertility and life expectancy. Remarkably, treatment of S. marcescens-infected nematodes with HNTs+Curc/DX nanocontainers completely restored the longevity, demonstrating the enhanced bioavailability of hydrophobic curcumin. We believe that our results reported here open new avenues for fabrication of effective antimicrobial nanoformulations based on hydrophobic drugs and clay nanotubes.
Collapse
Affiliation(s)
- Gölnur Fakhrullina
- Institute of Fundamental Medicine and Biology , Kazan Federal University , Kreml uramı 18 , Kazan 420008 , Republic of Tatarstan , Russian Federation
| | - Elvira Khakimova
- Institute of Fundamental Medicine and Biology , Kazan Federal University , Kreml uramı 18 , Kazan 420008 , Republic of Tatarstan , Russian Federation
| | - Farida Akhatova
- Institute of Fundamental Medicine and Biology , Kazan Federal University , Kreml uramı 18 , Kazan 420008 , Republic of Tatarstan , Russian Federation
| | - Giuseppe Lazzara
- Dipartimento di Fisica e Chimica , Università degli Studi di Palermo , Viale delle Scienze, pad. 17 , Palermo 90128 , Italy
| | - Filippo Parisi
- Dipartimento di Fisica e Chimica , Università degli Studi di Palermo , Viale delle Scienze, pad. 17 , Palermo 90128 , Italy
| | - Rawil Fakhrullin
- Institute of Fundamental Medicine and Biology , Kazan Federal University , Kreml uramı 18 , Kazan 420008 , Republic of Tatarstan , Russian Federation
| |
Collapse
|
13
|
Chong RWW, Ball M, McRae C, Packer NH. Comparing the chemical composition of dietary fibres prepared from sugarcane, psyllium husk and wheat dextrin. Food Chem 2019; 298:125032. [PMID: 31260968 DOI: 10.1016/j.foodchem.2019.125032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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] [Received: 07/10/2018] [Revised: 06/14/2019] [Accepted: 06/16/2019] [Indexed: 02/02/2023]
Abstract
A dietary fibre prepared from sugarcane stalk was compared with psyllium husk and wheat dextrin. In contrast to the other dietary fibres, sugarcane fibre was found to contain significant amounts of insoluble dietary fibre (73-86%), lignin (18.66-20.23%), and rare minerals such as chromium (0.67-2.54 mg/100 g) and manganese (1.07-2.34 mg/100 g). Analysis of the ethanol extract also detected compounds with antioxidant activity. Characterisation of five sugarcane fibres prepared from selected strains, harvest periods (growth or storage phase), and processing conditions showed these factors influenced the final composition. Furthermore, using in vitro digestion, we found that potassium, magnesium, chromium, and zinc in were bioaccessible in sugarcane samples. Also, sodium was shown to bind to the sugarcane fibre potentially indicating bile salt binding activity. Results from this study support the use of sugarcane as a source of dietary fibre in functional foods.
Collapse
Affiliation(s)
- Raymond Wei Wern Chong
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, North Ryde, 2109, New South Wales, Australia; Australian Research Council Industrial Transformation Training Centre for Molecular Technology in the Food Industry, Australia.
| | - Malcolm Ball
- Gratuk Technologies Pty. Ltd., Lane Cove North, 2066, New South Wales, Australia.
| | - Christopher McRae
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, North Ryde, 2109, New South Wales, Australia.
| | - Nicolle H Packer
- Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, North Ryde, 2109, New South Wales, Australia; Australian Research Council Industrial Transformation Training Centre for Molecular Technology in the Food Industry, Australia.
| |
Collapse
|
14
|
Wang PP, Luo ZG, Peng XC. Encapsulation of Vitamin E and Soy Isoflavone Using Spiral Dextrin: Comparative Structural Characterization, Release Kinetics, and Antioxidant Capacity during Simulated Gastrointestinal Tract. J Agric Food Chem 2018; 66:10598-10607. [PMID: 30217109 DOI: 10.1021/acs.jafc.8b00644] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 06/08/2023]
Abstract
Spiral dextrin subfraction (SD-40) obtained through enzyme debranching and gradient ethanol precipitation could interact with vitamin E (VE) or soy isoflavone (SIO) to form V-type inclusion complexes. The formation of two inclusion complexes was confirmed by Fourier transform-infrared spectroscopy, atomic force microscopy, and differential scanning calorimetry. In this study, an in vitro gastrointestinal model was used to investigate the breakdown of inclusion complexes and release behavior of bioactive compounds. The results indicated that the two inclusion complexes exhibited a controlled and sustained release behavior during digestion. In addition, the SD-40/VE inclusion complex presented higher stability and stronger antioxidant capacity than the SD-40/SIO inclusion complex. Furthermore, the first and zero order models were applied to understand the release kinetics of VE and SIO from inclusion complexes in the stomach, whereas the first order model was chosen to describe the release of VE and SIO from inclusion complexes in the intestine.
Collapse
Affiliation(s)
- Ping-Ping Wang
- School of Food Science and Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Zhi-Gang Luo
- School of Food Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- South China Institute of Collaborative Innovation , Dongguan 523808 , China
| | - Xi-Chun Peng
- Department of Food Science and Engineering, College of Science and Engineering , Jinan University , Guangzhou 510630 , China
| |
Collapse
|
15
|
Costa MS, Volanti DP, Grossmann MVE, Franco CML. Structural, thermal, and morphological characteristics of cassava amylodextrins. J Sci Food Agric 2018; 98:2751-2760. [PMID: 29105780 DOI: 10.1002/jsfa.8771] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 07/11/2017] [Revised: 10/29/2017] [Accepted: 10/30/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Amylodextrins from cassava starch were obtained by acid hydrolysis, and their structural, thermal and morphological characteristics were evaluated and compared to those from potato and corn amylodextrins. RESULTS Cassava starch was the most susceptible to hydrolysis due to imperfections in its crystalline structure. The crystalline patterns of amylodextrins remained unchanged, and crystallinity and peak temperature increased with hydrolysis time, whereas thermal degradation temperature decreased, independent of treatment time and starch source. Cassava amylodextrins had similar structural and morphological characteristics to those from corn amylodextrins due to their A-type crystalline arrangements. A-amylodextrins were structurally and thermally more stable than potato amylodextrins (B-type). Starch nanocrystals (SNC) were observed by transmission electron microscopy from the third day of hydrolysis in cassava amylodextrins, whereas potato and corn amylodextrins displayed SNC only on the fifth day. A-SNC displayed platelet shapes, whereas B-SNC were rounded. The SNC shape was related to the packing form and geometry of unit cells of allomorphs A and B. CONCLUSION Microstructures (agglomerated crystalline particles) and nanostructures (double helix organization) were observed for amylodextrins. Cassava starch was shown to be a promising material for SNC production, since it requires less hydrolysis time to obtaining more stable crystals. © 2017 Society of Chemical Industry.
Collapse
Affiliation(s)
- Mariana Souza Costa
- Department of Food Engineering and Technology, UNESP - São Paulo State University, São José do Rio Preto, SP, Brazil
| | - Diogo Paschoalini Volanti
- Department of Chemistry and Environmental Sciences, UNESP - São Paulo State University, São José do Rio Preto, SP, Brazil
| | | | - Célia Maria Landi Franco
- Department of Food Engineering and Technology, UNESP - São Paulo State University, São José do Rio Preto, SP, Brazil
| |
Collapse
|
16
|
Cao Y, Chen X, Sun Y, Shi J, Xu X, Shi YC. Hypoglycemic Effects of Pyrodextrins with Different Molecular Weights and Digestibilities in Mice with Diet-Induced Obesity. J Agric Food Chem 2018; 66:2988-2995. [PMID: 29446938 DOI: 10.1021/acs.jafc.8b00404] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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
Pyrodextrin shares some properties of resistant starch, which is metabolically beneficial, and has potential applications as a functional food. In this study, we report that the oral administration of pyrodextrin (50 mg/kg/d for 7 weeks) decreased blood glucose (from 9.18 ± 1.47 to 7.67 ± 0.42 mmol/L), serum HbA1c, triglycerides, adipocyte size, and body weight (from 24.4 ± 1.2 to 22.5 ± 1.2 g) in mice with high-fat-diet-induced obesity. Western-blotting analysis suggested that pyrodextrins decreased intestinal SGLT-1 and GLUT-2 expression to ∼70 and ∼60% of the obese control, respectively, which slowed down glucose transportation from the gut into the blood and tentatively improved hepatic metabolism. Moreover, the pyrodextrin with a lower molecular weight of 44 kDa, a more branched structure, and increased nondigestible starch of 46.2 ± 0.3% showed stronger hypoglycemic activity. This work provides important information for developing pyrodextrins as a functional food and dietary supplement for the management of obesity and diabetes.
Collapse
Affiliation(s)
- Yan Cao
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Xiaoli Chen
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
- College of Food Science and Technology, Modern Biochemistry Experimental Center , Guangdong Ocean University , Zhanjiang 524088 , China
| | - Ying Sun
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Jialiang Shi
- Department of Grain Science and Industry , Kansas State University , Manhattan , Kansas 66506 , United States
| | - Xiaojuan Xu
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Yong-Cheng Shi
- Department of Grain Science and Industry , Kansas State University , Manhattan , Kansas 66506 , United States
| |
Collapse
|
17
|
Catalán-Latorre A, Pleguezuelos-Villa M, Castangia I, Manca ML, Caddeo C, Nácher A, Díez-Sales O, Peris JE, Pons R, Escribano-Ferrer E, Fadda AM, Manconi M. Nutriosomes: prebiotic delivery systems combining phospholipids, a soluble dextrin and curcumin to counteract intestinal oxidative stress and inflammation. Nanoscale 2018; 10:1957-1969. [PMID: 29319093 DOI: 10.1039/c7nr05929a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nutriosomes, new phospholipid nanovesicles specifically designed for intestinal protection were developed by simultaneously loading a water-soluble dextrin (Nutriose® FM06) and a natural antioxidant (curcumin). Nutriosomes were easily fabricated in a one-step, organic solvent-free procedure. The stability and delivery performances of the vesicles were improved by adding hydroxypropyl methylcellulose. All the vesicles were small in size (mean diameter ∼168 nm), negatively charged (zeta potential ∼-38 mV, irrespective of their composition), and self-assembled predominantly in unilamellar vesicles stabilized by the presence of Nutriose®, which was located in both the inter-lamellar and inter-vesicle media, as confirmed by cryo-TEM and SAXS investigation. The dextrin acted also as a cryo-protector, avoiding vesicle collapse during the lyophilization process, and as a protector against high ionic strength and pH changes encountered in the gastrointestinal environment. Thanks to the antioxidant properties of curcumin, nutriosomes provided an optimal protective effect against hydrogen peroxide-induced oxidative stress in Caco-2 cells. Moreover, these innovative vesicles showed promising efficacy in vivo, as they improved the bioavailability and the biodistribution of both curcumin and dextrin upon oral administration, which acted synergically in reducing colonic damage chemically induced in rats.
Collapse
Affiliation(s)
- Ana Catalán-Latorre
- Dept. of Scienze della Vita e dell'Ambiente, University of Cagliari, Cagliari, Italy.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Wang PP, Qin XS, Yang QY, Luo ZG, Xiao ZG, Peng XC. Comparative Structural Characterization of Spiral Dextrin Inclusion Complexes with Vitamin E or Soy Isoflavone. J Agric Food Chem 2017; 65:8744-8753. [PMID: 28910527 DOI: 10.1021/acs.jafc.7b03242] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 06/07/2023]
Abstract
In this study, the preparation and structural properties of spiral dextrin (SD)/vitamin E and SD/soy isoflavone inclusion complexes were studied. SD was obtained from debranched normal maize starch using isoamylases. After fractionation using a novel method of gradient ethanol precipitation, SD was separated into different fractions, among which SD-40 was found to be the optimal host molecule to prepare SD inclusion complexes with vitamin E or soy isoflavone. X-ray diffraction (XRD) and 13C cross-polarization magic angle spinning nuclear magnetic resonance (NMR) suggested that the crystalline structures of SD-40/vitamin E and SD-40/soy isoflavone were V6II and V6III types, respectively. Small-angle X-ray scattering revealed that the SD-40/vitamin E inclusion complex formed a tighter and more compact crystallite than the SD-40/soy isoflavone inclusion complex. Furthermore, the connection structures of inclusion complexes were investigated by two-dimensional nuclear Overhauser effect spectroscopy NMR, indicating that part of vitamin E with an alkyl chain was encapsulated in the helix cavity of SD-40, whereas the aromatic ring B of the soy isoflavone molecule was complexed by the helix cavity and screw of SD.
Collapse
Affiliation(s)
- Ping-Ping Wang
- School of Food Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Xin-Sheng Qin
- School of Food Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Qing-Yu Yang
- School of Food Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
- College of Grain Science and Technology, Shenyang Normal University , Shenyang, Liaoning 110034, People's Republic of China
| | - Zhi-Gang Luo
- School of Food Science and Engineering, South China University of Technology , Guangzhou, Guangdong 510640, People's Republic of China
| | - Zhi-Gang Xiao
- College of Grain Science and Technology, Shenyang Normal University , Shenyang, Liaoning 110034, People's Republic of China
| | - Xi-Chun Peng
- Department of Food Science and Engineering, Jinan University , Guangzhou, Guangdong 510630, People's Republic of China
| |
Collapse
|
19
|
Jicsinszky L, Caporaso M, Calcio Gaudino E, Giovannoli C, Cravotto G. Synthesis of Randomly Substituted Anionic Cyclodextrins in Ball Milling. Molecules 2017; 22:molecules22030485. [PMID: 28335503 PMCID: PMC6155213 DOI: 10.3390/molecules22030485] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 11/18/2016] [Revised: 03/12/2017] [Accepted: 03/16/2017] [Indexed: 12/03/2022] Open
Abstract
A number of influencing factors mean that the random substitution of cyclodextrins (CD) in solution is difficult to reproduce. Reaction assembly in mechanochemistry reduces the number of these factors. However, lack of water can improve the reaction outcomes by minimizing the reagent’s hydrolysis. High-energy ball milling is an efficient, green and simple method for one-step reactions and usually reduces degradation and byproduct formation. Anionic CD derivatives have successfully been synthesized in the solid state, using a planetary ball mill. Comparison with solution reactions, the solvent-free conditions strongly reduced the reagent hydrolysis and resulted in products of higher degree of substitution (DS) with more homogeneous DS distribution. The synthesis of anionic CD derivatives can be effectively performed under mechanochemical activation without significant changes to the substitution pattern but the DS distributions were considerably different from the products of solution syntheses.
Collapse
Affiliation(s)
- László Jicsinszky
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 7, 10125 Turin, Italy.
| | - Marina Caporaso
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 7, 10125 Turin, Italy.
| | - Emanuela Calcio Gaudino
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 7, 10125 Turin, Italy.
| | - Cristina Giovannoli
- Department of Chemistry, University of Turin, Via P. Giuria 7, 10125 Turin, Italy.
| | - Giancarlo Cravotto
- Department of Drug Science and Technology, University of Turin, Via P. Giuria 7, 10125 Turin, Italy.
| |
Collapse
|
20
|
Sekar R, Shin HD, DiChristina TJ. Direct conversion of cellulose and hemicellulose to fermentable sugars by a microbially-driven Fenton reaction. Bioresour Technol 2016; 218:1133-1139. [PMID: 27469094 DOI: 10.1016/j.biortech.2016.07.087] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 07/18/2016] [Accepted: 07/20/2016] [Indexed: 06/06/2023]
Abstract
The aim of this work was to develop a microbially-driven Fenton reaction that fragments cellulose and hemicellulose, degrades cellodextrins and xylodextrins, and produces short-chain oligosaccharides and monomeric sugars in a single bioreactor. The lignocellulose degradation system operates at neutral pH and does not require addition of conventional lignocellulose-degrading enzymes, thus avoiding problems associated with enzyme accessibility and specificity. The ability to produce useful bioproducts was demonstrated by production of the bioplastic polyhydroxybutyrate with the xylan degradation products as starting substrate.
Collapse
Affiliation(s)
- Ramanan Sekar
- School of Biology, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Hyun Dong Shin
- School of Biology, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Thomas J DiChristina
- School of Biology, Georgia Institute of Technology, Atlanta, GA 30332, United States.
| |
Collapse
|
21
|
Liu H, Luo XJ, He Y, Zhang Y, Liu BB, Wu SS, Rao XY. [Effect of different DE values of malto-dextrin on properties for Schisandrae Chinensis Fructus spray-dried powder]. Zhongguo Zhong Yao Za Zhi 2016; 41:3016-3021. [PMID: 28920341 DOI: 10.4268/cjcmm20161612] [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] [Received: 05/16/2016] [Indexed: 06/07/2023]
Abstract
The purpose of this study was to compare the effect of different DE values of malto-dextrin on Schisandrae Chinensis Fructus spray-dried powder. The glass transition temperature (Tg) of the spray-dried powder, powder properties and microscopic morphology were determined, and then the moisture absorption isotherms and the glass transition temperature were used to predict its storage stability. The study showed that after adding malto-dextrin, the powder rate was increased; moisture content was decreased; Tg was increased; mobility got better; produced spherical microstructure; and Tg was increased with the decrease of DE value. The water activity-equilibrium moisture content (aw-EMC) relationship in GAB models showed, the moisture absorption of powder was increased with the rising of DE value; and the equilibrium moisture content-glass transition temperature (EMC-Tg) relationship in Gordon-Taylor models showed that, Tg was decreased with the increase of moisture content. As a result, the storage critical condition of the spray-dried powder was improved, and along with the decrease of DE value, the critical water activity and the critical water content were increased. Therefore, the smaller the DE value, the greater the stability of the spray-dried powder.
Collapse
Affiliation(s)
- Hui Liu
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Xiao-Jian Luo
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Nanchang 330006, China
| | - Yan He
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Yao Zhang
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Nanchang 330006, China
| | - Bin-Bin Liu
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Shuang-Shuang Wu
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Xiao-Yong Rao
- Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Nanchang 330006, China
| |
Collapse
|
22
|
Solah VA, O'Mara-Wallace B, Meng X, Gahler RJ, Kerr DA, James AP, Fenton HK, Johnson SK, Wood S. Consumption of the Soluble Dietary Fibre Complex PolyGlycopleX(®) Reduces Glycaemia and Increases Satiety of a Standard Meal Postprandially. Nutrients 2016; 8:nu8050268. [PMID: 27164135 PMCID: PMC4882681 DOI: 10.3390/nu8050268] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 02/09/2016] [Revised: 03/27/2016] [Accepted: 04/29/2016] [Indexed: 12/13/2022] Open
Abstract
The effect of consumption of PolyGlycopleX® (PGX®) was compared to wheat dextrin (WD) in combination with a standard meal, on postprandial satiety and glycaemia in a double-blind, randomised crossover trial, of 14 healthy subjects trained as a satiety panel. At each of six two-hour satiety sessions, subjects consumed one of three different test meals on two separate occasions. The test meals were: a standard meal plus 5 g PGX; a standard meal plus 4.5 g of PGX as softgels; and a standard meal plus 5 g of WD. Subjects recorded fullness using a labelled magnitude scale at 0, 15, 30, 45, 60, 90, and 120 min and the total area under the curve (AUC), mean fullness vs. time was calculated. The meals with PGX (in granular and softgel form) gave higher satiety (AUC) (477 ± 121 and 454 ± 242 cm·min), than the meal with WD (215 ± 261 cm·min) (p < 0.001). Subjects had blood glucose levels measured after the meals with PGX (granules) and WD. Glucose response (AUC) was significantly lower (p < 0.001) after the PGX meal than for the WD meal. The high viscosity reported for PGX is a likely mechanism behind the significant satiety and blood glucose modulating effects observed in this study.
Collapse
Affiliation(s)
- Vicky A Solah
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia 6845, Australia.
| | - Babette O'Mara-Wallace
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia 6845, Australia.
| | - Xingqiong Meng
- Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, Adelaide 5001, Australia.
| | | | - Deborah A Kerr
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia 6845, Australia.
| | - Anthony P James
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia 6845, Australia.
| | - Haelee K Fenton
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia 6845, Australia.
| | - Stuart K Johnson
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia 6845, Australia.
| | - Simon Wood
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia 6845, Australia.
- InovoBiologic Inc., Calgary, AB Y2N 4Y7, Canada.
- Food, Nutrition and Health Program, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
| |
Collapse
|
23
|
Silva JP, Dhall S, Garcia M, Chan A, Costa C, Gama M, Martins-Green M. Improved burn wound healing by the antimicrobial peptide LLKKK18 released from conjugates with dextrin embedded in a carbopol gel. Acta Biomater 2015; 26:249-62. [PMID: 26234490 DOI: 10.1016/j.actbio.2015.07.043] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [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] [Received: 02/17/2015] [Revised: 06/12/2015] [Accepted: 07/29/2015] [Indexed: 12/28/2022]
Abstract
Antimicrobial peptides (AMPs) are good candidates to treat burn wounds, a major cause of morbidity, impaired life quality and resources consumption in developed countries. We took advantage of a commercially available hydrogel, Carbopol®, a vehicle for topical administration that maintains a moist environment within the wound site. We hypothesized that the incorporation of LLKKK18 conjugated to dextrin would improve the healing process in rat burns. Whereas the hydrogel improves healing, LLKKK18 released from the dextrin conjugates further accelerated wound closure, and simultaneously improving the quality of healing. Indeed, the release of LLKKK18 reduced oxidative stress and inflammation (low neutrophil and macrophage infiltration and pro-inflammatory cytokines levels). Importantly, it induced a faster resolution of the inflammatory stage through early M2 macrophage recruitment. In addition, LLKKK18 stimulated angiogenesis (increased VEGF and microvessel development in vivo). Moreover, collagen staining evaluated by Masson's Trichrome was visually much more intense after treatment with LLKKK18, suggesting higher collagen deposition. Overall, we generated an effective, safe and inexpensive formulation that maintains a moist environment in the wound, easy to apply and remove, and with potential to prevent infection due to the presence of an antimicrobial peptide. These findings propel us to further study this LLKKK18-containing formulation, setting the foundations towards a potential therapeutic approach for burn wound treatment. STATEMENT OF SIGNIFICANCE This work presents a newly developed formulation that holds great potential as a therapeutic approach for burn treatment. It is based on the sustained delivery of an antimicrobial peptide - LLKKK18 - from conjugates with dextrin, after degradation of dextrin backbone upon exposure to wound α-amylases. Conjugates were further embedded in Carbopol®, a commercially available hydrogel, suitable for topical administration and that provides a moist environment to the wound. Overall, we obtained an efficient, safe and non-expensive formulation that improves burn wound healing, maintains a moist environment within the wound, is easy to apply-and-remove, and has potential to prevent infection due to the presence of an antimicrobial peptide. Importantly, this is the first time the wound healing ability of LLKKK18 is demonstrated and that its main mechanisms of action are identified.
Collapse
Affiliation(s)
- João P Silva
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States; CEB - Centre for Biological Engineering, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal.
| | - Sandeep Dhall
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States; Bioengineering Interdepartmental Graduate Program, University of California at Riverside, Riverside, CA 92521, United States
| | - Monika Garcia
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States
| | - Alex Chan
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States
| | - César Costa
- CEB - Centre for Biological Engineering, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Miguel Gama
- CEB - Centre for Biological Engineering, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Manuela Martins-Green
- Department of Cell Biology and Neuroscience, University of California at Riverside, Riverside, CA 92521, United States; Bioengineering Interdepartmental Graduate Program, University of California at Riverside, Riverside, CA 92521, United States
| |
Collapse
|
24
|
Barczyńska R, Śliżewska K, Libudzisz Z, Kapuśniak K, Kapuśniak J. Prebiotic properties of potato starch dextrins. POSTEP HIG MED DOSW 2015; 69:1031-1041. [PMID: 26400889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
The objective of the present study was to compare the prebiotic properties of starch dextrins, that is, resistant dextrins obtained from potato starch in the process of simultaneous thermolysis and chemical modification, which were selected based on previous research. Both prepared dextrins met the definition criterion of dietary fiber and also the basic prebiotic criterion - they were not degraded by the digestive enzymes of the initial sections of the gastrointestinal tract. The growth of probiotic lactobacilli and bifidobacteria, as well as Escherichia coli, Enterococcus, Bacteroides, and Clostridium strains isolated from feces of healthy people, showed that both studied dextrins were utilized as a source of assimilable carbon and energy by the strains. Furthermore, better growth (higher numbers of cells) counts of probiotic bacteria than those of fecal isolates indicated that the studied resistant dextrins showed a selective effect. Both dextrins might be considered as substances with prebiotic properties due to their chemical and physical properties and selectivity towards the studied probiotic bacterial strains.
Collapse
Affiliation(s)
- Renata Barczyńska
- Institute of Chemistry, Environmental Protection and Biotechnology, Jan Dlugosz University in Czestochowa, Poland
| | - Katarzyna Śliżewska
- Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences, Technical University of Lodz, Poland
| | - Zdzisława Libudzisz
- Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences, Technical University of Lodz, Poland
| | - Kamila Kapuśniak
- Institute of Chemistry, Environmental Protection and Biotechnology, Jan Dlugosz University in Czestochowa, Poland
| | - Janusz Kapuśniak
- Institute of Chemistry, Environmental Protection and Biotechnology, Jan Dlugosz University in Czestochowa, Poland
| |
Collapse
|
25
|
Das D, Ghosh P, Ghosh A, Haldar C, Dhara S, Panda AB, Pal S. Stimulus-Responsive, Biodegradable, Biocompatible, Covalently Cross-Linked Hydrogel Based on Dextrin and Poly(N-isopropylacrylamide) for in Vitro/in Vivo Controlled Drug Release. ACS Appl Mater Interfaces 2015; 7:14338-51. [PMID: 26069986 DOI: 10.1021/acsami.5b02975] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [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: 05/23/2023]
Abstract
A novel stimulus-sensitive covalently cross-linked hydrogel derived from dextrin, N-isopropylacrylamide, and N,N'-methylene bis(acrylamide) (c-Dxt/pNIPAm), has been synthesized via Michael type addition reaction for controlled drug release application. The chemical structure of c-Dxt/pNIPAm has been confirmed through Fourier transform infrared (FTIR) spectroscopy and (1)H and (13)C NMR spectral analyses. The surface morphology of the hydrogel has been studied by field emission scanning electron microscopic (FE-SEM) and environmental scanning electron microscopic (E-SEM) analyses. The stimulus responsiveness of the hydrogel was studied through equilibrium swelling in various pH media at 25 and 37 °C. Rheological study was performed to measure the gel strength and gelation time. Noncytotoxicity of c-Dxt/pNIPAm hydrogel has been studied using human mesenchymal stem cells (hMSCs). The biodegradability of c-Dxt/pNIPAm was confirmed using hen egg lysozyme. The in vitro and in vivo release studies of ornidazole and ciprofloxacin imply that c-Dxt/pNIPAm delivers both drugs in a controlled way and would be an excellent alternative for a dual drug carrier. The FTIR, powder X-ray diffraction (XRD), and UV-vis-near infrared (NIR) spectra along with the computational study predict that the drugs remain in the matrix through physical interaction. A stability study signifies that the drugs (ornidazole ∼97% and ciprofloxacin ∼98%) are stable in the tablet formulations for up to 3 months.
Collapse
Affiliation(s)
- Dipankar Das
- †Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India
| | | | - Animesh Ghosh
- §Departmental of Pharmaceutical Sciences, Birla Institutes of Technology, Mesra, Ranchi, Jharkhand 835215, India
| | - Chanchal Haldar
- †Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India
| | | | - Asit Baran Panda
- ∥Discipline of Inorganic Materials and Catalysis, Central Salt and Marine Chemicals Research Institute (CSIR), Bhavnagar, Gujarat 364002, India
| | - Sagar Pal
- †Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines, Dhanbad 826004, India
| |
Collapse
|
26
|
Dzamukova MR, Naumenko EA, Lvov YM, Fakhrullin RF. Enzyme-activated intracellular drug delivery with tubule clay nanoformulation. Sci Rep 2015; 5:10560. [PMID: 25976444 PMCID: PMC4432568 DOI: 10.1038/srep10560] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 04/13/2015] [Indexed: 12/22/2022] Open
Abstract
Fabrication of stimuli-triggered drug delivery vehicle s is an important milestone in treating cancer. Here we demonstrate the selective anticancer drug delivery into human cells with biocompatible 50-nm diameter halloysite nanotube carriers. Physically-adsorbed dextrin end stoppers secure the intercellular release of brilliant green. Drug-loaded nanotubes penetrate through the cellular membranes and their uptake efficiency depends on the cells growth rate. Intercellular glycosyl hydrolases-mediated decomposition of the dextrin tube-end stoppers triggers the release of the lumen-loaded brilliant green, which allowed for preferable elimination of human lung carcinoma cells (А549) as compared with hepatoma cells (Hep3b). The enzyme-activated intracellular delivery of brilliant green using dextrin-coated halloysite nanotubes is a promising platform for anticancer treatment.
Collapse
Affiliation(s)
- Maria R Dzamukova
- Bionanotechnology Lab, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml uramı 18, Kazan, Republic of Tatarstan, Russian Federation, 420008
| | - Ekaterina A Naumenko
- Bionanotechnology Lab, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml uramı 18, Kazan, Republic of Tatarstan, Russian Federation, 420008
| | - Yuri M Lvov
- Institute for Micromanufacturing, Louisiana Tech University, 911 Hergot Ave., Ruston, LA, 71272, USA
| | - Rawil F Fakhrullin
- 1] Bionanotechnology Lab, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml uramı 18, Kazan, Republic of Tatarstan, Russian Federation, 420008 [2] Institute for Micromanufacturing, Louisiana Tech University, 911 Hergot Ave., Ruston, LA, 71272, USA
| |
Collapse
|
27
|
Das D, Ghosh P, Dhara S, Panda AB, Pal S. Dextrin and poly(acrylic acid)-based biodegradable, non-cytotoxic, chemically cross-linked hydrogel for sustained release of ornidazole and ciprofloxacin. ACS Appl Mater Interfaces 2015; 7:4791-4803. [PMID: 25654747 DOI: 10.1021/am508712e] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [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: 06/04/2023]
Abstract
Herein, novel biodegradable, stimulus-responsive, chemically cross-linked and porous hydrogel has been synthesized to evaluate its applicability as an efficient carrier for sustained release of ornidazole and ciprofloxacin. The cross-linked hydrogel (c-Dxt/pAA) has been developed from dextrin and poly(acrylic acid) using N,N'-methylene bis(acrylamide) cross-linker via Michael-type addition reaction. With the variation of reaction parameters, various c-Dxt/pAA hydrogels have been synthesized to optimize the best one. c-Dxt/pAA hydrogel has been characterized using various physicochemical characterization techniques. The hydrogel demonstrates significant pH and temperature sensitivity. Gel characteristics and gel kinetics have been performed through the measurement of rheological parameters. The hydrogel shows noncytotoxic behavior toward human mesenchymal stem cells. Biodegradation study predicts that c-Dxt/pAA is degradable in nature. The in vitro release of ornidazole and ciprofloxacin suggests that the hydrogel released both the drugs in a controlled manner with extensive stability up to 3 months. The results suggest that c-Dxt/pAA is probably a promising candidate for controlled release of ornidazole and ciprofloxacin.
Collapse
Affiliation(s)
- Dipankar Das
- Polymer Chemistry Laboratory, Department of Applied Chemistry, Indian School of Mines , Dhanbad 826004, India
| | | | | | | | | |
Collapse
|
28
|
Böttcher S, Steinhäuser U, Drusch S. Off-flavour masking of secondary lipid oxidation products by pea dextrin. Food Chem 2015; 169:492-8. [PMID: 25236256 DOI: 10.1016/j.foodchem.2014.05.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [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] [Received: 01/27/2014] [Revised: 04/07/2014] [Accepted: 05/03/2014] [Indexed: 11/18/2022]
Abstract
The aim of the present study was to evaluate the off-flavour masking potential of pea dextrin (PD) in emulsions rich in ω-3 and ω-6-fatty acids in comparison with maltodextrin (MD) and 2-hydroxypropyl-β-cyclodextrin (HPBCD). After optimisation of the homogenisation procedure, stable emulsions were prepared and stored for up to eight weeks. The development of six secondary lipid oxidation products: propanal, 1-penten-3-one, 1-penten-3-ol, hexanal, (E,E)-2,4-heptadienal and (E,Z)-2,6-nonadienal, was monitored via headspace gas chromatography after solid-phase microextraction. Sensory evaluation of the emulsions was performed by a trained panel. PD already showed masking properties for propanal, 1-penten-3-one, hexanal and (E,E)-2,4-heptadienal during validation of the gas chromatographic analysis, but not for 1-penten-3-ol or (E,Z)-2,6-nonadienal. During storage, the course of lipid oxidation was similar in all emulsions as concluded from the hydroperoxide value. Results from the sensory evaluation confirmed a masking of rancid off-flavour. In conclusion, pea dextrin is suitable for masking off-flavour resulting from early stages of lipid oxidation.
Collapse
Affiliation(s)
- S Böttcher
- Beuth University of Applied Sciences Berlin, Department of Life Sciences and Technology, Luxemburger Straße 10, 13353 Berlin, Germany.
| | - U Steinhäuser
- Beuth University of Applied Sciences Berlin, Department of Life Sciences and Technology, Luxemburger Straße 10, 13353 Berlin, Germany
| | - S Drusch
- Institute of Food Technology and Food Chemistry, Department of Food Technology and Food Material Science, Technische Universität Berlin, Königin-Luise-Str. 22, 14195 Berlin, Germany
| |
Collapse
|
29
|
Wei W, Zhao Y, Peng S, Zhang H, Bian Y, Li H, Li H. Yolk-shell nanoarchitectures with a Ru-containing core and a radially oriented mesoporous silica shell: facile synthesis and application for one-pot biomass conversion by combining with enzyme. ACS Appl Mater Interfaces 2014; 6:20851-20859. [PMID: 25405326 DOI: 10.1021/am5052608] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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: 06/04/2023]
Abstract
In this paper, we develop a facile strategy for fabricating a yolk-shell structured catalytic system that consists of a core made of Ru supported on mesoporous carbon, which is encaged within a silica shell that has ordered radial mesochannels. A region-selective etching mechanism for the formation of the yolk-shell nanoarchitectures is proposed based on the stronger adsorption ability of the carbon core for etching agent than that of the silica shell for etching agent. By combining such material with amyloglucosidase, one-pot hydrolysis-hydrogenation of dextrin to sorbitol can be conducted, delivering enhanced efficiency and showing great promise for biomass conversion applications.
Collapse
Affiliation(s)
- Wei Wei
- Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University , Shanghai 200234, P. R. China
| | | | | | | | | | | | | |
Collapse
|
30
|
Abstract
Although Maillard reaction plays a pivotal role during preparation of food, only few investigations concerning the role of carbohydrate degradation in beer aging have been carried out. The formation of Maillard specific precursor structures and their follow-up products during degradation of low molecular carbohydrate dextrins in the presence of proline and lysine was studied in model incubations and in beer. Twenty-one α-dicarbonyl compounds were identified and quantitated as reactive intermediates. The oxidative formation of 3-deoxypentosone as the precursor of furfural from oligosaccharides was verified. N-Carboxymethylproline and N-formylproline were established as novel proline derived Maillard advanced glycation end products. Formation of N-carboxymethylproline and furfural responded considerably to the presence of oxygen and was positively correlated to aging of Pilsner type beer. The present study delivers an in-depth view on the mechanisms behind the formation of beer relevant aging parameters.
Collapse
Affiliation(s)
- Stefan Rakete
- Food Chemistry, Institute of Chemistry, Martin-Luther-University Halle-Wittenberg , Kurt-Mothes-Straße 2, 06120 Halle/Saale, Germany
| | | | | |
Collapse
|
31
|
Bai Y, Cai L, Doutch J, Gilbert EP, Shi YC. Structural changes from native waxy maize starch granules to cold-water-soluble pyrodextrin during thermal treatment. J Agric Food Chem 2014; 62:4186-4194. [PMID: 24779859 DOI: 10.1021/jf5000858] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [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: 06/03/2023]
Abstract
The structural changes occurring during the thermal conversion of insoluble native waxy maize starch granules to cold-water-soluble pyrodextrin under acidic conditions have been investigated by multiple techniques, including synchrotron small-angle X-ray scattering (SAXS), wide-angle X-ray scattering, differential scanning calorimetry, and gel permeation chromatography. In a mixture of water/glycerol (20/80, w/w), the SAXS characteristic peak at ca. 0.6 nm(-1) decreased in intensity as pyrodextrin solubility increased. The peak disappeared as pyrodextrin solubility reached 100%. Starch crystal size, its associated melting enthalpy, and pyrodextrin molecular size decreased as solubility increased. Although starch structure changed during thermal conversion, the pyrodextrins appeared identical to the native starch when observed in glycerol under a normal and polarized light microscope. It is proposed that the starch backbone is hydrolyzed by acid in the amorphous region and the crystalline region with starch molecules being hydrolyzed into small molecular fractions but persisting in a radial arrangement.
Collapse
Affiliation(s)
- Yanjie Bai
- Department of Grain Science and Industry, Kansas State University , Manhattan, Kansas 66506, United States
| | | | | | | | | |
Collapse
|
32
|
Sliżewska K. The citric acid-modified, enzyme-resistant dextrin from potato starch as a potential prebiotic. Acta Biochim Pol 2013; 60:671-675. [PMID: 24432315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 11/25/2013] [Accepted: 12/12/2013] [Indexed: 06/03/2023]
Abstract
In the present study, enzyme-resistant dextrin, prepared by heating of potato starch in the presence of hydrochloric (0.1% dsb) and citric (0.1% dsb) acid at 130ºC for 3 h (CA-dextrin), was tested as a source of carbon for probiotic lactobacilli and bifidobacteria cultured with intestinal bacteria isolated from feces of three healthy 70-year old volunteers. The dynamics of growth of bacterial monocultures in broth containing citric acid (CA)-modified dextrin were estimated. It was also investigated whether lactobacilli and bifidobacteria cultured with intestinal bacteria in the presence of resistant dextrin would be able to dominate the intestinal isolates. Prebiotic fermentation of resistant dextrin was analyzed using prebiotic index (PI). In co-cultures of intestinal and probiotic bacteria, the environment was found to be dominated by the probiotic strains of Bifidobacterium and Lactobacillus, which is a beneficial effect.
Collapse
Affiliation(s)
- Katarzyna Sliżewska
- Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences, Technical University of Lodz, Łódź, Poland
| |
Collapse
|
33
|
Pazzetto R, Ferreira SBDS, Santos EJS, Moriwaki C, Guedes TA, Matioli G. Preservation of Bacillus firmus strain 37 and optimization of cyclodextrin biosynthesis by cells immobilized on loofa sponge. Molecules 2012; 17:9476-88. [PMID: 22874792 PMCID: PMC6268496 DOI: 10.3390/molecules17089476] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2012] [Revised: 07/18/2012] [Accepted: 07/21/2012] [Indexed: 11/16/2022] Open
Abstract
The preservation of Bacillus firmus strain 37 cells by lyophilization was evaluated and response surface methodology (RSM) was used to optimize the β-cyclodextrin (β-CD) production by cells immobilized on loofa sponge. Interactions were studied with the variables temperature, pH and dextrin concentration using a central composite design (CCD). Immobilization time influence on β-CD production was also investigated. B. firmus strain 37 cells remained viable after one year of storage, showing that the lyophilization is a suitable method for preservation of the microorganism. From the three-dimensional diagrams and contour plots, the best conditions for β-CD production were determined: temperature 60 °C, pH 8, and 18% dextrin. Considering that the amount of dextrin was high, a new assay was carried out, in which dextrin concentrations of 10, 15, and 18% were tested and the temperature of 60 °C and pH 8 were maintained. The results achieved showed very small differences and therefore, for economic reasons, the use of 10% dextrin is suggested. Increasing the immobilization time of cells immobilized on synthetic sponge the β-CD production decreased and did not change for cells immobilized on loofa sponge. The results of this research are important for microorganism preservation and essential in the optimization of the biosynthesis of CD.
Collapse
Affiliation(s)
- Rúbia Pazzetto
- Department of Pharmacy, State University of Maringá (UEM), Av. Colombo, 5790, Maringá-PR 87020-900, Brazil
| | | | - Elder James Silva Santos
- Department of Pharmacy, State University of Maringá (UEM), Av. Colombo, 5790, Maringá-PR 87020-900, Brazil
| | - Cristiane Moriwaki
- Department of Pharmacy, State University of Maringá (UEM), Av. Colombo, 5790, Maringá-PR 87020-900, Brazil
| | - Teresinha Aparecida Guedes
- Department of Statistics, State University of Maringá (UEM), Av. Colombo, 5790, Maringá-PR 87020-900, Brazil
| | - Graciette Matioli
- Department of Pharmacy, State University of Maringá (UEM), Av. Colombo, 5790, Maringá-PR 87020-900, Brazil
- Author to whom correspondence should be addressed; ; Tel.: +55-44-3011-3868; Fax: +55-44-3011-4119
| |
Collapse
|
34
|
Abstract
The effects of spring dextrin on amylose recrystallization were investigated by wide-angle X-ray diffraction (WXRD) and differential scanning calorimetry (DSC). Recrystallinity of amylose was reduced in terms of adding SD(7), SD(9), or SD(11). Alternatively, SD(3) or SD(5) accelerated the degree of crystallinity. DSC data were analyzed using the Avrami equation and confirmed the results of WXRD. Finally, molecular dynamic simulation was adapted to predict the behavior of polymers in water, and the results showed that the small spring dextrins disturbed amylose retrogradation by inhibiting or altering amylose-amylose interaction.
Collapse
Affiliation(s)
- Jin Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, People's Republic of China
| | | | | | | | | | | |
Collapse
|
35
|
Jochym K, Kapusniak J, Barczynska R, Sliżewska K. New starch preparations resistant to enzymatic digestion. J Sci Food Agric 2012; 92:886-891. [PMID: 21969274 DOI: 10.1002/jsfa.4665] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 08/12/2011] [Accepted: 08/15/2011] [Indexed: 05/31/2023]
Abstract
BACKGROUND New starch preparations were produced by thermolysis of potato starch in the presence of inorganic (hydrochloric) and organic (citric and tartaric) acids under controlled conditions. The starch preparations were physicochemically and structurally characterised and analysed for their resistance to enzymatic digestion in vitro. RESULTS The content of resistant fraction in dextrin D1, obtained by heating starch acidified with hydrochloric and citric acids, determined by the AOAC 2001.03 and pancreatin-gravimetric methods was similar (~200 g kg⁻¹). In the case of dextrin D3, obtained by heating starch acidified with hydrochloric and tartaric acids, the result of determination by the pancreatin-gravimetric method was almost four times higher than that obtained with the AOAC 2001.03 method. The enzymatic tests revealed that dextrin D3 obtained with excess tartaric acid can be classified as RS4, which can only be partially determined by enzymatic-gravimetric methods. Tartaric acid at high concentration had a significantly stronger influence on starch hydrolysis than citric acid. This was confirmed by chromatographic analysis of dextrins and chemical investigation of the reducing power. CONCLUSION The results confirmed the possibility of applying dextrins, prepared under specific conditions, as soluble dietary fibre.
Collapse
Affiliation(s)
- Kamila Jochym
- Institute of Chemistry, Environmental Protection and Biotechnology, Jan Dlugosz University in Czestochowa, Czestochowa, Poland
| | | | | | | |
Collapse
|
36
|
Lin AHM, Chang YH, Chou WB, Lu TJ. Interference prevention in size-exclusion chromatographic analysis of debranched starch glucans by aqueous system. J Agric Food Chem 2011; 59:5890-5898. [PMID: 21553821 DOI: 10.1021/jf104393q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Branch chain-length distribution of amylopectin plays an important role on the characteristics of starch. One of the adapted protocols for determining the chain-length distribution and mass proportion of starch molecules is that starch is debranched with isoamylase and then analyzed by using high-performance size-exclusion chromatography coupled with multiangle laser-light scattering and refractive index detection (HPSEC-MALS-RI). However, ammonium sulfate in commercial isoamylase and acetate in debranching buffer give significant interferences on the chromatograms because of their undesirable ionic interactions with column sorbent materials. This study deals with development for correcting those interferences. A weak anion-exchange resin or selective precipitation with barium acetate was employed to remove sulfate prior to HPSEC determination. The interference of acetate was overcome by means of high ionic strength eluent, 0.3 M sodium nitrate. The specific refractive index increment (dn/dc) of amylodextrin was determined to be 0.147 using the modified conditions and was applied to calculate the molecular weight distribution of debranched starch molecules.
Collapse
Affiliation(s)
- Amy Hui-Mei Lin
- Institute of Food Science and Technology, National Taiwan University, 1, Sec. 4 Roosevelt Road, Taipei 10617, Taiwan, Republic of China
| | | | | | | |
Collapse
|
37
|
Gonçalves C, Ferreira MFM, Santos AC, Prata MIM, Geraldes CFGC, Martins JA, Gama FM. Studies on the biodistribution of dextrin nanoparticles. Nanotechnology 2010; 21:295103. [PMID: 20601764 DOI: 10.1088/0957-4484/21/29/295103] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The characterization of biodistribution is a central requirement in the development of biomedical applications based on the use of nanoparticles, in particular for controlled drug delivery. The blood circulation time, organ biodistribution and rate of excretion must be well characterized in the process of product development. In this work, the biodistribution of recently developed self-assembled dextrin nanoparticles is addressed. Functionalization of the dextrin nanoparticles with a DOTA-monoamide-type metal chelator, via click chemistry, is described. The metal chelator functionalized nanoparticles were labelled with a gamma-emitting (153)Sm(3+) radioisotope and the blood clearance rate and organ biodistribution of the nanoparticles were obtained. The effect of PEG surface coating on the blood clearance rate and organ biodistribution of the nanoparticles was also studied.
Collapse
Affiliation(s)
- C Gonçalves
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological Engineering, Minho University, Campus de Gualtar, 4710-057 Braga, Portugal
| | | | | | | | | | | | | |
Collapse
|
38
|
Abstract
The adsorption of dextrin on talc, molybdenite, and graphite (three naturally hydrophobic minerals) has been compared. Adsorption isotherms and in situ tapping mode atomic force microscope (TMAFM) imaging have enabled polymer adsorbed amount and morphology of the adsorbed layer (area coverage and polymer domain size) to be determined and also the amount of hydration water in the structure of the adsorbed layer. The effect of the polymer on the mineral contact angles, measured by the captive bubble method on cleaved mineral surfaces, indicates clear correlations between the hydrophobicity reduction of the minerals, the adsorbed amount, and the surface coverage of the adsorbed polymer. Predictions of the flotation recovery of the treated mineral phases have been confirmed by performing batch flotation experiments. The influence of the polymer surface coverage on flotation recovery has highlighted the importance of this key parameter in the predictions of depressant efficiency. The roles of the initial hydrophobicity and the surface structure of the mineral basal plane in determining adsorption parameters and flotation response of the polymer-treated minerals are also discussed.
Collapse
Affiliation(s)
- Audrey Beaussart
- Ian Wark Research Institute, ARC Special Research Centre for Particles and Material Interfaces, University of South Australia, Mawson Lakes SA 5095, Australia
| | | | | |
Collapse
|
39
|
Abstract
Erythropoietin (EPO) loaded microneedles were prepared using thread-forming polymer as a base for the percutaneous administration of EPO. The used polymers were dextrin, chondroitin sulfate and albumin. Under room temperature, EPO solution was added to high concentration of polymer solution and microneedles were prepared by forming thread with polypropylene tips. The mean weight of microneedle was 0.59 +/- 0.01 mg and length and basal diameter were 3.24 +/- 0.16 and 0.55 +/- 0.03 mm, respectively. Four microneedles were percutaneously (pc) administered to mice at the EPO dose levels of 100 IU/kg. After administration, blood samples were collected for 24 h and serum EPO levels were measured. Dextrin EPO microneedles were administered both pc and subcutaneously (sc) to mice. Serum EPO levels vs. time profiles showed Cmax of 138.6 +/- 16.1 and 146.5 +/- 8.0 mIU/ml, respectively. Tmax were 7.5 h. The values of bioavailability (BA) of EPO were 82.1 and 99.4%, respectively. By decreasing the dose from 100 to 50 and 25 IU/kg, dose-dependent serum EPO levels vs. time profiles were not clearly obtained. When chondroitin sulfate and albumin were used as the microneedle base, the serum EPO levels vs. time profiles showed almost the same pattern. Cmax of chondroitin sulfate and albumin microneedles were 96.3 +/- 8.8 and 132.2 +/- 18.9 mIU/ml, respectively. AUCs were 835.1 and 1098.7 mIU h/ml. Tmax were 8 and 6.8 h. These results suggest the usefulness of microneedles for the percutaneous administration of EPO.
Collapse
Affiliation(s)
- Yukako Ito
- Department of Pharmacokinetics, Kyoto Pharmaceutical University, Yamashina-Ku, Kyoto, 607-8414, Japan.
| | | | | | | | | |
Collapse
|
40
|
Shaunak S, Thornton M, Teo I, Chandler B, Jones M, Steel S. Optimisation of the Degree of Sulfation of a Polymer Based Construct to Block the Entry of HIV-1 into Cells. J Drug Target 2008; 11:443-8. [PMID: 15203933 DOI: 10.1080/1061186042000203574] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Blocking the entry of HIV-1 into CD4+ cells is an important new therapeutic target for the development of novel vaginal microbicides. In this study, sulfated derivatives of the linear polysaccharide dextrin were synthesised whose percentage sulphation increased incrementally from 7.4 to 48.3%. Their anti-HIV-1 activity in C8166 cells was first seen when percentage sulfation reached 33.2%, but it was only seen in peripheral blood mononuclear cells when it reached 36.3%. It did not increase further when sulfation reached 40.2%. Primary viruses with a V3 loop charge of greater than +5 were blocked by 80 microg/ml of dextrin 2 sulfate but primary viruses with a V3 loop charge of less than +3 required 1,600 microg/ml to block viral entry effectively. Our results identify the relative contribution of the percentage sulfation of a polymer based construct for optimising its anti-HIV-1 activity whilst minimising its toxicity. A better understanding of these structure-function relationships will inform the design and development of novel vaginal microbicides to effectively block the sexual transmission of all primary viral isolates of HIV-1.
Collapse
Affiliation(s)
- Sunil Shaunak
- Faculty of Medicine, Department of Infectious Diseases, Imperial College London, Hammersmith Hospital, Ducane Road, London W12 ONN, UK.
| | | | | | | | | | | |
Collapse
|
41
|
Abstract
The encapsulation of Beijerinckia sp. cell suspension in different wall materials using the spray drying technique was performed. Mat dextrin, dehydrated glucose syrups, gum acacia and modified starch materials were tested. Cell viability assays were carried out before and after drying and during storage of the products. The surface area and characteristics of the encapsulated powders were examined using BET adsorption of N(2) and scanning electron microscopy, respectively. The residual moisture content and water activity of the powders were also determined. The best results were obtained with the dehydrated glucose syrup, which resulted in products with the greatest per cent survival during the drying process and subsequent storage period. The products obtained with the dehydrated glucose syrup showed more uniform microcapsule surfaces at lower A(w) values and residual moisture content.
Collapse
Affiliation(s)
- Y Boza
- Department of Food Science, Faculty of Food Engineering, University of Campinas, Campinas C.P. 6121 13081-970, Brazil.
| | | | | |
Collapse
|
42
|
Sergio AP, Isabel DSFDRC, José BM, Otero-Espinar FJ. Fast and Controlled Release of Triamcinolone Acetonide from Extrusion-Spheronization Pellets Based on Mixtures of Native Starch with Dextrin or Waxy Maize Starch. Drug Dev Ind Pharm 2008; 33:945-51. [PMID: 17891580 DOI: 10.1080/03639040601128720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Pellets composed chiefly of inexpensive starches allow modulation of the rate of release of the poorly soluble drug triamcinolone acetonide in media of pH 1.2-6.8. Wheat- or maize-starch-based pellets with 20% of white dextrin release the drug in vitro almost completely within 20 min, while maize-starch-based pellets with 5-35% of waxy maize starch sustain gradual release over periods of 9-12 hr or longer when prepared using appropriate amounts of granulation fluid.
Collapse
Affiliation(s)
- Almeida-Prieto Sergio
- Departamento de Farmacia y Tecnología Farmacéutica, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | | | | | | |
Collapse
|
43
|
Park K. Bioresponsive drug delivery for regenerative medicine. J Control Release 2008; 130:201. [PMID: 18706947 DOI: 10.1016/j.jconrel.2008.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
44
|
Feng C, Cai YL, Ruan JL. [Research on formulation process of Yigong capsule]. Zhong Yao Cai 2008; 31:128-130. [PMID: 18589764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To choose the best supplementary material and formulation process of Yigong capsule. METHODS Critical relative humidity, absorption curve of moisture, angle of repose were used as the norms of the research. The suitable preparation and formulation process of Yigong capsule had been sieved. RESULTS It was feasible that the combined preparation of PH102 micro cellulse were mixed with the medicinal powder. The absorption of moisture of the medicinal powder was improved. The humidity of mass production and store was lower than 64%. CONCLUSION This craft simple is feasible and can provide the better anti-water absorbability of formulation process condition for Yigong capsule.
Collapse
Affiliation(s)
- Chao Feng
- College of Pharmacy, Tongji Medical Center of Huazhong University of Science and Technology, Wuhan, China.
| | | | | |
Collapse
|
45
|
Tugtas AE, Pavlostathis SG. Inhibitory effects of nitrate reduction on methanogenesis in the presence of different electron donors. Water Sci Technol 2008; 57:693-698. [PMID: 18401140 DOI: 10.2166/wst.2008.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The preferential utilization of different electron donors and their effects on the nitrate reduction and methanogenesis in a mixed, mesophilic (35 degrees C) methanogenic culture were investigated. Batch methanogenic cultures were fed with dextrin/peptone (D/P), propionate, acetate, and H(2)/CO(2) at an initial COD of 500 mg/L and an initial nitrate concentration of 50 mg N/L. Immediate cessation of methane production was observed in all nitrate-amended cultures. Methane production completely recovered in the D/P- and acetate-fed cultures, and partially recovered or did not recover in the propionate- and H(2)/CO(2)-fed, nitrate-amended cultures, respectively. Accumulation of denitrification intermediates was observed in both the propionate- and H(2)/CO(2)-fed cultures, which resulted in inhibition of fermentation and/or methanogenesis. The fastest and the slowest nitrate reduction were observed in the acetate- and propionate-fed cultures, respectively.
Collapse
Affiliation(s)
- A E Tugtas
- School of Civil and Environmental Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332-0512, USA
| | | |
Collapse
|
46
|
Salunkhe KS, Kulkarni MV. Formulation and in-vitro evaluation of dextrin matrix tablet of Ibuprofen for colon specific drug delivery. Pak J Pharm Sci 2008; 21:17-20. [PMID: 18166513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The objective of the present study is to develop colon targeted drug delivery system by using dextrin (polysaccharide) as a carrier for ibuprofen. Matrix tablets containing various excipients and dextrin were prepared by wet granulation technique using different binder systems. The matrix tablets were evaluated by different IPQC tests, content uniformity and in vitro drug release study. Drug release profile was evaluated in simulated gastric, intestinal fluid and simulated colonic fluid. Best formulation was decided on the basis drug release profile in simulated gastric and intestinal fluid. The matrix tablet containing dextrin as a carrier and ethyl cellulose as binder was found to be suitable for targeting ibuprofen for local action in the colon as compare to other matrix tablets containing different binders because of fewer amounts (8-11%) of drug release in the simulated gastric and intestinal fluid. Matrix tablets containing dextrin released 95-98% of ibuprofen in simulated colonic fluid with 4% human fecal matter solution. Tablets containing dextrin showed no change in physical appearance and dissolution profile upon storage at 40 degrees C/75% relative humidity for three months. The results of in-vitro study indicate that matrix tablets containing dextrin as carrier and ethyl cellulose as binder are most suitable to deliver the drug specifically in colonic region as compare to matrix tablets of dextrin with other binder systems.
Collapse
|
47
|
Cucinotta V, Giuffrida A, Maccarrone G, Messina M, Puglisi A, Vecchio G. Synthesis and NMR characterization of β-alanine-bridged hemispherodextrin, a very efficient chiral selector in EKC. Electrophoresis 2007; 28:2580-8. [PMID: 17607805 DOI: 10.1002/elps.200600813] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A capped derivative of beta-CD (THALAH) was synthesized and characterized by NMR spectroscopy at different pH values. A trehalose moiety, bonded through beta-alanine bridges to the CD cavity, is included in the capping unit, giving peculiar properties to this molecule. The hemispherodextrin thus obtained was tested as a chiral selector in EKC. At neutral pH, the monocationic species of THALAH behaves as a very efficient selector separating successfully all the 11 tested enantiomeric pairs of dansyl-derivatives of amino acids, some of them even at concentrations as low as 0.15 mM. The differences observed in the migration order among the different systems give suggestions about the mechanism of molecular recognition between the selector and the analytes.
Collapse
|
48
|
Kovalenko GA, Perminova LV, Terent'eva TG, Plaksin GV. [Catalytic properties of glucoamylase immobilized on the synthetic carbon material Sibunit]. Prikl Biokhim Mikrobiol 2007; 43:412-418. [PMID: 17929567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Glucoamylase (commercial preparation Glucavamorin) was immobilized by sorption on a carbon support Sibunit. Starch saccharification by the resulting biocatalyst (dextrin hydrolysis) was studied. Investigation of the effect of adsorptional immobilization on kinetic parameters of glucoamylase, including the rate constant of thermal inactivation, showed that immobilization of Glucavamorin on Sibunit resulted in a thousandfold increase in glucoamylase stability in comparison with the dissolved enzyme. Presence of the substrate (dextrins) in the reaction mixture had a considerable stabilizing effect. Increase in dextrin concentration increases the thermostability of the immobilized enzyme. The overall factor of glucoamylase stabilization adsorbed on Sibunit with the presence of 53% dextrin solutions in comparison with the dissolved enzyme approximated 10(5). The biocatalyst for starch saccharification made on the base of Subunit-adsorbed Glucavamorin had a high operational stability. Its half-inactivation time at 60 degrees C exceeded 30 days.
Collapse
|
49
|
Abstract
The amphiphilic molecule dextrin-VA-SC16 (dexC16) was synthesized and studied in this work. DexC16 has a hydrophilic dextrin backbone with grafted acrylate groups (VA) substituted with hydrophobic 1-hexadecanethiol (C16). A versatile synthetic method was developed allowing control of the dextrin degree of substitution with the hydrophobic chains (DSC16, number of alkyl chains per 100 dextrin glucopyranoside residues). Materials with different DSC16 were prepared and characterized using 1H NMR. DexC16 self-assembles in water through association of the hydrophobic alkyl chains, originating nanoparticles. The nanoparticles properties were studied by dynamic light scattering (DLS), fluorescence spectroscopy, and atomic force microscopy (AFM).
Collapse
Affiliation(s)
- Catarina Gonçalves
- Centro de Engenharia Biológica and Departamento de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | | | | |
Collapse
|
50
|
Sicoli G, Pertici F, Jiang Z, Jicsinszky L, Schurig V. Gas-chromatographic approach to probe the absence of molecular inclusion in enantioseparations by carbohydrates. Investigation of linear dextrins (“acyclodextrins”) as novel chiral stationary phases. Chirality 2007; 19:391-400. [PMID: 17387752 DOI: 10.1002/chir.20383] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Acetylated/silylated maltooligosaccharides with different degrees of oligomerization have been tested as chiral stationary phases for enantioselective gas chromatography. The acyclic dextrin derivatives carrying tert-butyldimethylsilyl groups at the primary hydroxyl sites and acetyl groups at the secondary hydroxyl sites showed an unexpected ability for the enantioseparation of alpha-amino acid derivatives and halogenated compounds, in addition to some underivatized chiral compounds. Some examples of an improved enantioselectivity invoked by the linear CSPs as compared to that of cyclic oligosaccharides are demonstrated in this work. The results highlight the role of the polar external surface of the selector in lieu of the well-established inclusion mechanism of enantiorecognition by cyclic dextrins. Thus, the enantioseparation of chiral compounds on linear dextrin derivatives--devoid of a molecular cavity--sheds a new light on the mechanisms of enantiorecognition by cyclodextrin derivatives. In contrast to cyclodextrins, linear dextrins are readily accessible in both enantiomeric forms.
Collapse
Affiliation(s)
- Giuseppe Sicoli
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, Tübingen, Germany
| | | | | | | | | |
Collapse
|