151
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Park H, Kim H, Kim GY, Lee MY, Kim Y, Kang S. Enhanced biodegradation of hydrocarbons by Pseudomonas aeruginosa-encapsulated alginate/gellan gum microbeads. JOURNAL OF HAZARDOUS MATERIALS 2021; 406:124752. [PMID: 33316667 DOI: 10.1016/j.jhazmat.2020.124752] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 10/10/2020] [Accepted: 11/30/2020] [Indexed: 05/17/2023]
Abstract
Pseudomonas aeruginosa-encapsulated alginate/gellan gum microbeads (PAGMs) were prepared at the condition of 10 g/L alginate, 1 g/L gellan gum, and 2.57 mM calcium ions, and investigated for the biodegradation of a diesel-contaminated groundwater. The degradation of diesel with PAGMs reached 71.2% after 10days in the aerobic condition, while that of suspended bacteria was only 32.0% even after 30days. The kinetic analysis showed that PAGMs had more than two-order higher second-order kinetic constant than that of the suspended bacteria. Interestingly, the degradation of diesel was ceased due to the depletion of the dissolved oxygen after 10 day in the PAGM reactor, but the microbial degradation activity was immediately restored after the addition of oxygen to 10.5 mg/L. The change in ATP concentration and the viability of bacteria showed that the microbial activity in PAGMs were maintained (66.4%, and 84.3%, respectively) even after 30days of experiment with PAGMs due to the protective barrier of the microbeads, whereas those of suspended bacteria showed significant decrease to 6.2% and 14.4% of initial value, respectively, due to the direct contact to toxic hydrocarbons. The results suggested that encapsulation of bacterial cells could be used for the enhanced biodegradation of diesel hydrocarbons in aqueous systems.
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Affiliation(s)
- Hyejoo Park
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hyojeon Kim
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ga-Yeong Kim
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Mi-Young Lee
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Young Kim
- Department of Environmental Systems Engineering, Korea University Sejong Campus, 2511 Sejong-ro, Sejong City 30019, Republic of Korea
| | - Seoktae Kang
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
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152
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Applications of mixed polysaccharide-protein systems in fabricating multi-structures of binary food gels—A review. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.01.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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153
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Nishinari K, Fang Y. Molar mass effect in food and health. Food Hydrocoll 2021; 112:106110. [PMID: 32895590 PMCID: PMC7467918 DOI: 10.1016/j.foodhyd.2020.106110] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 12/26/2022]
Abstract
It is demanded to supply foods with good quality for all the humans. With the advent of aging society, palatable and healthy foods are required to improve the quality of life and reduce the burden of finance for medical expenditure. Food hydrocolloids can contribute to this demand by versatile functions such as thickening, gelling, stabilising, and emulsifying, controlling texture and flavour release in food processing. Molar mass effects on viscosity and diffusion in liquid foods, and on mechanical and other physical properties of solid and semi-solid foods and films are overviewed. In these functions, the molar mass is one of the key factors, and therefore, the effects of molar mass on various health problems related to noncommunicable diseases or symptoms such as cancer, hyperlipidemia, hyperglycemia, constipation, high blood pressure, knee pain, osteoporosis, cystic fibrosis and dysphagia are described. Understanding these problems only from the viewpoint of molar mass is limited since other structural characteristics, conformation, branching, blockiness in copolymers such as pectin and alginate, degree of substitution as well as the position of the substituents are sometimes the determining factor rather than the molar mass. Nevertheless, comparison of different behaviours and functions in different polymers from the viewpoint of molar mass is expected to be useful to find a common characteristics, which may be helpful to understand the mechanism in other problems.
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Affiliation(s)
- Katsuyoshi Nishinari
- Glyn O. Phillips Hydrocolloids Research Centre, School of Food and Biological Engineering, Hubei University of Technology, Wuhan, 430068, PR China
- Department of Food and Nutrition, Graduate School of Human Life Science, Osaka City University, Osaka, 558-6565, Japan
| | - Yapeng Fang
- Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
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154
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Khin MN, Goff HD, Nsor-Atindana J, Ahammed S, Liu F, Zhong F. Effect of texture and structure of polysaccharide hydrogels containing maltose on release and hydrolysis of maltose during digestion: In vitro study. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106326] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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155
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Wang J, Zhao X, Zhou C, Wang C, Zheng Y, Ye K, Li C, Zhou G. Effects of gellan gum and inulin on mixed-gel properties and molecular structure of gelatin. Food Sci Nutr 2021; 9:1336-1346. [PMID: 33747449 PMCID: PMC7958535 DOI: 10.1002/fsn3.2077] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 12/03/2020] [Accepted: 12/08/2020] [Indexed: 12/25/2022] Open
Abstract
Gellan gum (GG) is often added to gelatin (GL) to improve the gel property. GG-based or inulin (IL)-based hydrogels were developed. Rigid and brittle gels or smooth and delicate gels were prepared with GG and IL, respectively. This study aimed to explore the properties and interaction mechanisms of the mixed-gel system containing GL, GG, and IL, in which different ratios of GG-IL (0.4%) (10:0, 8:2, 6:4, 5:5, 4:6, 2:8, and 0:10) were added to GL (6%). Texture profiles, rheological properties, water mobility, intermolecular forces, circular dichroism (CD) spectra, and microstructures were analyzed. The results showed that addition of GG-IL could improve the hardness, chewiness, and cohesiveness of mixed-gel, besides maintaining appropriate springiness. Water mobility of the mixed-gel decreased while viscoelasticity increased upon the addition GG. At GG:IL = 2:8, the melting temperature of mixed-gel was far higher than that of GL gel itself. The GL-GG-IL gel showed decrease in nonspecific bonding and increase in hydrogen bonding compared with the GL gel. CD spectra indicated the promotion of GL unfolding by GG, hence suggesting the binding of GG to GL; binding ability was better at GG:IL >5:5. Cryo-SEM provided evidence for the formation of cross-linked network within GL-GG-IL. Overall, we concluded that addition of GG-IL to GL system would be most suitable for improving the properties of mixed-gel. This finding may be potentially applicable in the further development of gel food products, such as meat jellies and gummy jellies.
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Affiliation(s)
- Juanjuan Wang
- Key Laboratory of Meat Processing and Quality ControlMOEKey Laboratory of Meat ProcessingMOAJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlNanjing Agricultural UniversityNanjingP.R. China
| | - Xue Zhao
- Key Laboratory of Meat Processing and Quality ControlMOEKey Laboratory of Meat ProcessingMOAJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlNanjing Agricultural UniversityNanjingP.R. China
| | - Changyu Zhou
- Key Laboratory of Meat Processing and Quality ControlMOEKey Laboratory of Meat ProcessingMOAJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlNanjing Agricultural UniversityNanjingP.R. China
| | - Chong Wang
- Key Laboratory of Meat Processing and Quality ControlMOEKey Laboratory of Meat ProcessingMOAJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlNanjing Agricultural UniversityNanjingP.R. China
| | - Yanyan Zheng
- Key Laboratory of Meat Processing and Quality ControlMOEKey Laboratory of Meat ProcessingMOAJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlNanjing Agricultural UniversityNanjingP.R. China
| | - Keping Ye
- Key Laboratory of Meat Processing and Quality ControlMOEKey Laboratory of Meat ProcessingMOAJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlNanjing Agricultural UniversityNanjingP.R. China
| | - Chunbao Li
- Key Laboratory of Meat Processing and Quality ControlMOEKey Laboratory of Meat ProcessingMOAJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlNanjing Agricultural UniversityNanjingP.R. China
| | - Guanghong Zhou
- Key Laboratory of Meat Processing and Quality ControlMOEKey Laboratory of Meat ProcessingMOAJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlNanjing Agricultural UniversityNanjingP.R. China
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156
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Kanyuck K, Norton-Welch A, Mills T, Norton I. Structural characterization of interpenetrating network formation of high acyl gellan and maltodextrin gels. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106295] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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157
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Rheological and emulsifying properties of an exopolysaccharide produced by potential probiotic Leuconostoc citreum-BMS strain. Carbohydr Polym 2021; 256:117523. [DOI: 10.1016/j.carbpol.2020.117523] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 12/13/2020] [Accepted: 12/13/2020] [Indexed: 01/15/2023]
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158
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Kohyama K, Ishihara S, Nakauma M, Funami T. Fracture phenomena of soft gellan gum gels during compression with artificial tongues. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106283] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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159
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Wan L, Yang Z, Cai R, Pan S, Liu F, Pan S. Calcium-induced-gel properties for low methoxyl pectin in the presence of different sugar alcohols. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106252] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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160
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Zhao M, Zhang H, Xu X, Li S, Xu H. A strategy for the synthesis of low-molecular-weight welan gum by eliminating capsule form of Sphingomonas strains. Int J Biol Macromol 2021; 178:11-18. [PMID: 33636257 DOI: 10.1016/j.ijbiomac.2021.02.157] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/18/2021] [Accepted: 02/20/2021] [Indexed: 10/22/2022]
Abstract
Welan gum is widely used in food, concrete additives, and oil recovery. Here we changed the capsule form of Sphingomonas strains by knocked out the sortase gene (srtW). The obtained welan gum was mainly composed of mannose, glucose, rhamnose, and glucuronic acid at a molar ratio of 4.0:5.8:1.6:1, respectively. Meanwhile, the molecular weight of welan gum decreased sharply (about 68 kDa). Moreover, the low molecular weight (LMW) welan gum was characterized by FT-IR and NMR spectroscopy. The rheological results revealed that the LMW welan gum solution is a pseudoplastic fluid with a lower apparent viscosity. Furthermore, the oscillation test illustrated stable dynamic viscoelasticity within the temperature range of 5-68 °C and frequency range of 0.01-15 rad/s. To the best of our knowledge, this is the first report of LMW welan gum production and characterization. These results provide references for LMW welan gum applications, and likely applicable for other biopolymers production.
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Affiliation(s)
- Ming Zhao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Hao Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Xiaoqi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Sha Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
| | - Hong Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
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161
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Lee W, Choi JH, Lee J, Youn J, Kim W, Jeon G, Lee SW, Song JE, Khang G. Dopamine-Functionalized Gellan Gum Hydrogel as a Candidate Biomaterial for a Retinal Pigment Epithelium Cell Delivery System. ACS APPLIED BIO MATERIALS 2021; 4:1771-1782. [PMID: 35014523 DOI: 10.1021/acsabm.0c01516] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In this study, dopamine-functionalized gellan gum (DFG) hydrogel was prepared as a carrier for retinal pigment epithelium (RPE) cell delivery via a carbodiimide reaction. The carboxylic acid of gellan gum (GG) was replaced with catechol in a 21.3% yield, which was confirmed by NMR. Sol fraction and weight loss measurements revealed that dopamine improved degradability in the GG hydrogel. Measurements of the viscosity, injection force, and compressibility also showed that dopamine-functionalized GG hydrogels had more desirable rheological/mechanical properties for improving injectability. These characteristics were confirmed to arise from the GG's helix structure loosened by the dopamine's bulky nature. Moreover, dopamine's hydrophilic characteristics were confirmed to create a more favorable microenvironment for cell growth by promoting swelling capability and cell attachment. This improved biocompatibility became more pronounced when the hydrophilicity of dopamine was combined with a larger specific surface area stemming from the less porous structure of the dopamine-grafted hydrogels. This effect was apparent from the live/dead staining images of the as-prepared hydrogels. Meanwhile, the nonionic cross-linked DFG (DG) hydrogel showed the lowest protein expression in the immunofluorescence staining images obtained after 28 days of culture, supporting that it had the highest degradability and associated cell-releasing ability. That tendency was also observed in the gene expression data acquired by real-time polymerase chain reaction (RT-PCR) analysis. RT-PCR analysis also revealed that the DG hydrogel carrier could upregulate the visual function-related gene of RPE. Overall, the DG hydrogel system demonstrated its feasibility as a carrier of RPE cells and its potential as a means of improving visual function.
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Affiliation(s)
- Wonchan Lee
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Joo Hee Choi
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Jaewoo Lee
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.,Department of Polymer-Nano Science and Technology, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Jina Youn
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Wooyoup Kim
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Gayeong Jeon
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Sung Won Lee
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Jeong Eun Song
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Gilson Khang
- Department of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea.,Department of Polymer-Nano Science and Technology, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
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162
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Ng JY, Zhu X, Mukherjee D, Zhang C, Hong S, Kumar Y, Gokhale R, Ee PLR. Pristine Gellan Gum-Collagen Interpenetrating Network Hydrogels as Mechanically Enhanced Anti-inflammatory Biologic Wound Dressings for Burn Wound Therapy. ACS APPLIED BIO MATERIALS 2021; 4:1470-1482. [PMID: 35014496 DOI: 10.1021/acsabm.0c01363] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Gellan gum is a biologically inert natural polymer that is increasingly favored as a material-of-choice to form biorelevant hydrogels. However, as a burn wound dressing, native gellan gum hydrogels do not drive host's biology toward regeneration and are mechanically inadequate wound barriers. To overcome these issues, we fabricateda gellan gum-collagen full interpenetrating network (full-IPN) hydrogel that can house adipose-derived mesenchymal stem cells (ADSCs) and employ their multilineage differentiation potential and produce wound-healing paracrine factors to reduce inflammation and promote burn wound regeneration. Herein, a robust temperature-dependent simultaneous IPN (SIN) hydrogel fabrication process was demonstrated using applied rheology for the first time. Subsequently after fabrication, mechanical characterization assays showed that the IPN hydrogels were easy to handle without deforming and retained sufficient mass to effect ADSCs' anti-inflammation property in a simulated wound environment. The IPN hydrogels' increased stiffness proved conducive for mechanotransduced cell adhesion. Scanning electron microscopy revealed theIPN's porous network, which enabled encapsulated ADSCs to spread and proliferate, for up to 3 weeks of culture, further shown by cells' dynamic filopodia extension observed in 3D confocal images. Successful incorporation of ADSCs accorded the IPN hydrogels with biologic wound-dressing properties, which possess the ability to promote human dermal fibroblast migration and secrete an anti-inflammatory paracrine factor, TSG-6 protein, as demonstrated in the 2D scratch wound assay and ELISA, respectively. More importantly, upon application onto murine full thickness burn wounds, our biologic wound dressing enhanced early wound closure, reduced inflammation, and promoted complete skin regeneration. Altogether, our results highlight the successful mechanical and biological enhancement of the inert matrix of gellan gum. Through completely natural procedures, a highly applicable biologic wound dressing is introduced for cell-based full thickness burn wound therapy.
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Affiliation(s)
- Jian Yao Ng
- Department of Pharmacy, Faculty of Science, National University of Singapore, 5 Science Drive 2, 117545, Singapore
| | - Xiao Zhu
- Department of Pharmacy, Faculty of Science, National University of Singapore, 5 Science Drive 2, 117545, Singapore
| | - Devika Mukherjee
- Department of Pharmacy, Faculty of Science, National University of Singapore, 5 Science Drive 2, 117545, Singapore
| | - Chi Zhang
- Roquette Singapore Innovation Center, Helios, 11 Biopolis Way, #05-06, 138667, Singapore
| | - Shiqi Hong
- Roquette Singapore Innovation Center, Helios, 11 Biopolis Way, #05-06, 138667, Singapore
| | - Yogesh Kumar
- Roquette Singapore Innovation Center, Helios, 11 Biopolis Way, #05-06, 138667, Singapore
| | - Rajeev Gokhale
- Roquette Singapore Innovation Center, Helios, 11 Biopolis Way, #05-06, 138667, Singapore
| | - Pui Lai Rachel Ee
- Department of Pharmacy, Faculty of Science, National University of Singapore, 5 Science Drive 2, 117545, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, 21 Lower Kent Ridge Road, 119077, Singapore
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163
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Mohd Nadzir M, Nurhayati RW, Idris FN, Nguyen MH. Biomedical Applications of Bacterial Exopolysaccharides: A Review. Polymers (Basel) 2021; 13:530. [PMID: 33578978 PMCID: PMC7916691 DOI: 10.3390/polym13040530] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 01/28/2021] [Accepted: 02/02/2021] [Indexed: 12/11/2022] Open
Abstract
Bacterial exopolysaccharides (EPSs) are an essential group of compounds secreted by bacteria. These versatile EPSs are utilized individually or in combination with different materials for a broad range of biomedical field functions. The various applications can be explained by the vast number of derivatives with useful properties that can be controlled. This review offers insight on the current research trend of nine commonly used EPSs, their biosynthesis pathways, their characteristics, and the biomedical applications of these relevant bioproducts.
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Affiliation(s)
- Masrina Mohd Nadzir
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia;
| | - Retno Wahyu Nurhayati
- Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia;
- Stem Cell and Tissue Engineering Research Cluster, Indonesian Medical Education and Research Institute, Faculty of Medicine, Universitas Indonesia, Jl. Salemba Raya No. 6, Jakarta 10430, Indonesia
| | - Farhana Nazira Idris
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia;
| | - Minh Hong Nguyen
- Faculty of Biotechnology, Chemistry and Environmental Engineering, Phenikaa University, Hanoi 12116, Vietnam;
- Bioresource Research Center, Phenikaa University, Hanoi 12116, Vietnam
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164
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Exploiting the robust network structure of zein/low-acyl gellan gum nanocomplexes to create Pickering emulsion gels with favorable properties. Food Chem 2021; 349:129112. [PMID: 33581437 DOI: 10.1016/j.foodchem.2021.129112] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 09/22/2020] [Accepted: 01/11/2021] [Indexed: 02/06/2023]
Abstract
Zein/low-acyl gellan gum (GG) composite particles (ZGPs) were fabricated to stabilize Pickering emulsions (termed "ZGPEs"). The wettability of ZGPs was manipulated simply by adjusting the concentration of GG. The effects of GG concentration, oil fraction and pH on ZGPEs were systematically evaluated by confocal laser scanning microscopy (CLSM), cryo-scanning electron microscopy (cryo-SEM), dynamic light scattering technique, stimulated emission depletion (STED) nanoscopy and rheology. The results showed that ZGPEs exhibited robust colloidal properties and distinct advantage over other previously reported zein-polysaccharide-based Pickering emulsions. CLSM, STED and cryo-SEM analyses revealed that the network structures formed by GG and ZGPs at the continuous phase and oil-water interface were the main contributors to the emulsion's characteristics. This study provides insights into the fabrication of food-grade Pickering emulsions with distinct characteristics that impart favorable properties to various foods and bioactive delivery systems.
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165
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Karemore MN, Bali NR. Gellan gum based gastroretentive tablets for bioavailability enhancement of cilnidipine in human volunteers. Int J Biol Macromol 2021; 174:424-439. [PMID: 33539955 DOI: 10.1016/j.ijbiomac.2021.01.199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/25/2021] [Accepted: 01/29/2021] [Indexed: 12/14/2022]
Abstract
Cilnidipine, a fourth-generation both L-and N-type calcium channel blocker (CCB) is safe and effective in lowering blood-pressure without reflex tachycardia compared to other dihydropyridine CCBs. However, its low solubility coupled with extensive first-pass metabolism results in very low oral bioavailability. Thus the study aimed to improve oral bioavailability of Cilnidipine by increasing its gastrointestinal transit-time and mucoadhesion. Gastroretentive tablets were prepared by direct-compression technique using gellan gum as hydrogel forming polymer and sodium bicarbonate as gas-generating agent. Statistical optimization was carried out by design approach which showed that gellan gum has significant impact on floating lag time, mucoadhesive strength, % drug release at 1 h and time to release 90% of drug. Drug release study revealed that optimized tablets prolonged drug release for 12 h and followed anomalous-diffusion indicating drug release is by coupling of both diffusion and erosion mechanism. Intragastric behaviour of formulation in human volunteers revealed that radio-opaque tablets remain buoyant in stomach for more than 6 h with sufficient mucoadhesion. Comparative pharmacokinetic profiling in human subjects revealed that relative bioavailability of Cilnidipine GR tablets was enhanced compared to reference tablets. Thus concluded that gastroretentive tablets to be promising strategy for improved oral bioavailability of Cilnidipine for effective treatment of hypertension.
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Affiliation(s)
- Megha N Karemore
- University Department of Pharmaceutical Sciences, Mahatma Jyotiba Fuley Shaikshanik Parisar, R. T. M. Nagpur University Campus, Nagpur 440033, Maharashtra, India.
| | - Nikhil R Bali
- University Department of Pharmaceutical Sciences, Mahatma Jyotiba Fuley Shaikshanik Parisar, R. T. M. Nagpur University Campus, Nagpur 440033, Maharashtra, India
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166
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Khubber S, Chaturvedi K, Thakur N, Sharma N, Yadav SK. Low-methoxyl pectin stabilizes low-fat set yoghurt and improves their physicochemical properties, rheology, microstructure and sensory liking. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106240] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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167
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Nooshkam M, Varidi M. Physicochemical stability and gastrointestinal fate of β-carotene-loaded oil-in-water emulsions stabilized by whey protein isolate-low acyl gellan gum conjugates. Food Chem 2021; 347:129079. [PMID: 33493834 DOI: 10.1016/j.foodchem.2021.129079] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 01/03/2021] [Accepted: 01/07/2021] [Indexed: 12/25/2022]
Abstract
This study aimed to examine the effect of whey protein isolate-low acyl gellan gum (WPI-GG) conjugate on the physicochemical properties and digestibility of β-carotene-loaded oil-in-water emulsions. The WPI-GG conjugate-stabilized emulsions had lower droplet sizes with more homogenous distribution, more negative surface charge, and higher interfacial protein concentration and viscosity, compared to those stabilized by WPI-GG mixture and WPI. The emulsion droplets coated by the conjugate were also generally more stable to environmental stresses (i.e., storage, pH changes, ionic strength, freeze-thaw cycles, and thermal treatment) along with higher β-carotene retention than other systems. The stability to droplet aggregation during in vitro digestion was remarkably increased for the conjugate-stabilized emulsion. However, the β-carotene bioaccessibility was significantly affected when the conjugate was used to stabilize the emulsions, likely due to the thick interfacial layer, high viscosity, and negative charge of the corresponding emulsions that could inhibit droplet digestion and mixed micelle formation.
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Affiliation(s)
- Majid Nooshkam
- Department of Food Science and Technology, Faculty of Agriculture, Ferdowsi University of Mashhad (FUM), Mashhad, Iran
| | - Mehdi Varidi
- Department of Food Science and Technology, Faculty of Agriculture, Ferdowsi University of Mashhad (FUM), Mashhad, Iran.
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168
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Iijima M, Hatakeyama T, Hatakeyama H. DSC and TMA Studies of Polysaccharide Physical Hydrogels. ANAL SCI 2021; 37:211-219. [PMID: 33281133 DOI: 10.2116/analsci.20sar10] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Various kinds of polysaccharides found in a wide variety of plants, bacteria, crustaceans and insects form hydrogels via physical aggregation in aqueous media. The major mass of hydrogels is water filled, ca. 95 - 99.5%, in a network structure, although the solid shape of the gel is maintained. In this paper, firstly the wide range of gelation mechanisms are briefly described, and then the thermal analysis of representative gel-forming polysaccharides, such as carrageenan, alginate, galactomannan, and pectin, is introduced. By differential scanning calorimetry (DSC), gel-sol and the sol-gel transition temperature of thermoreversible hydrogels are measured and phase diagram is established. It is suggested that binary systems showing sinusoidal gel-sol-gel transition are capable of being assembled. By thermomechanical analysis (TMA), the dynamic modulus (E') at around 1 × 104 Pa of thermo-irreversible hydrogels was obtained using a sample holder designed to measure the viscoelastic properties in water. Reliable coordination is shown between the results obtained by DSC and TMA. In this review, the current research and several topics on concerning the thermal properties of polysaccharide physical hydrogels are introduced.
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Affiliation(s)
- Mika Iijima
- Department of Nutrition, Faculty of Health Sciences, Aomori University of Health and Welfare, 58-1 Mase, Hamadate, Aomori, 030-8505, Japan
| | | | - Hyoe Hatakeyama
- Lignocell Research Ltd, 391-5 Ofunato, Tsukuba, 300-1267, Japan
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169
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Applications of gellan natural polymer microspheres in recombinant catechol-O-methyltransferase direct capture from a Komagataella pastoris lysate. Int J Biol Macromol 2021; 172:186-196. [PMID: 33421470 DOI: 10.1016/j.ijbiomac.2020.12.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/23/2020] [Accepted: 12/31/2020] [Indexed: 11/24/2022]
Abstract
The present work shows the application of nickel- and magnesium-crosslinked gellan microspheres in ionic and affinity capture strategies to directly extract hSCOMT from the complex Komagataella pastoris lysate through a simple batch method. Both formulations present similar morphology, but nickel-crosslinked microspheres present higher crosslinker content and smaller diameters. Four different capture strategies were established, by manipulating the ionic strength, pH, temperature and competing agents' presence. The most promising results for hSCOMT capture and clarification were obtained employing an ionic strategy with nickel-crosslinked microspheres and an affinity strategy with magnesium-crosslinked microspheres at 4 °C. The bioactivity results (200%) and purification degree (70%) of hSCOMT captured by the ionic strategy were more satisfactory probably due to the soft ionic conditions used (100 mM NaCl). For the first time, the gellan polysaccharide versatility was demonstrated in the microsphere application for the direct capture of hSCOMT from a complex lysate, simplifying isolation biotechnological procedures.
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170
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Gelling Properties. Food Hydrocoll 2021. [DOI: 10.1007/978-981-16-0320-4_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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171
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Effect of pH variation and crosslinker absence on the gelling mechanism of high acyl gellan: Morphological, thermal and mechanical approaches. Carbohydr Polym 2021; 251:117002. [DOI: 10.1016/j.carbpol.2020.117002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 08/24/2020] [Indexed: 12/21/2022]
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172
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Marboh V, Mahanta CL. Physicochemical and rheological properties and in vitro digestibility of heat moisture treated and annealed starch of sohphlang (Flemingia vestita) tuber. Int J Biol Macromol 2020; 168:486-495. [PMID: 33316343 DOI: 10.1016/j.ijbiomac.2020.12.065] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 12/06/2020] [Accepted: 12/07/2020] [Indexed: 10/22/2022]
Abstract
The effect of heat moisture treatment (HMT) and annealing (ANN) on physicochemical and rheological properties and in vitro digestibility of starch extracted from sohphlang (Flemingia vestita) was studied. Modification by HMT and ANN increased amylose content and water absorption capacity. For all modified samples, solubility, swelling power and amylose leaching progressively increased with increasing temperature (50-90 °C). Modified starches exhibited higher contents of SDS and RS and lower content of RDS as compared to native starch for both cooked and uncooked samples. The rheological properties of starch pastes were investigated by the power law model. The starch paste samples exhibited shear thinning characteristics and phase angle was closer to 0°. HMT-30 and ANN-80 exhibited greater impact on in vitro digestibility and rheological behaviour among the HMT and ANN starches, respectively. Thus, ANN and HMT could be used for modification of sohphlang starch making them suitable for application in food systems like pasta and noodles.
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Affiliation(s)
- Vegonia Marboh
- Department of Food Engineering and Technology, School of Engineering, Tezpur University, Assam, India
| | - Charu Lata Mahanta
- Department of Food Engineering and Technology, School of Engineering, Tezpur University, Assam, India.
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173
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Jahan N, Shahnaz S, Hossain KS. Gel point determination of gellan biopolymer gel from DC electrical conductivity. E-POLYMERS 2020. [DOI: 10.1515/epoly-2021-0002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Gellan is an anionic bacterial polysaccharide, which in aqueous solution dissociates into a charged gellan polymer molecule containing carboxyl ions and counter ions and forms thermoreversible gel under appropriate conditions. In this study, we investigated the effect of polymer concentration, the concentration of added monovalent metallic ion, and temperature on the DC electrical conductivity of the gellan. Results suggest that the DC conductivity decreases with the increasing polymer concentrations and the added monovalent metallic ions. Such a decrease in DC conductivity can be attributed to the reduction of the mobility of counter ions due to the increase in the crosslinking density of the gellan network. DC conductivity of gellan gels was increased with temperature, which is interpreted as the dissolution of physically cross-linked networks, thus increasing the mobility of counter ions. The behavior of temperature variation of DC electrical conductivity reveals an abrupt change at a specific temperature, which can be considered a way to determine the gel point or sol–gel transition temperature T
c of this thermoreversible biopolymer gel. This result agrees with that of rheological measurements where the viscosity showed a similar trend with temperature and diverges to infinity at the temperature close to T
c.
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Affiliation(s)
- Nusrat Jahan
- Department of Physics, Bangabandhu Sheikh Mujibur Rahman Maritime University , Dhaka 1216 , Bangladesh
| | - Sakiba Shahnaz
- Department of Mathematical and Physical Sciencess, East West University , Dhaka 1212 , Bangladesh
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174
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Fabrication of emulsion gel based on polymer sanxan and its potential as a sustained-release delivery system for β-carotene. Int J Biol Macromol 2020; 164:597-605. [PMID: 32687901 DOI: 10.1016/j.ijbiomac.2020.07.177] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 12/14/2022]
Abstract
Food-grade emulsion gels have attracted increasing attention in food and drug manufacturing, owing to their potential as novel delivery systems for lipophilic bioactive ingredients. Emulsion gels are structurally either a polymeric gel matrix with incorporated emulsion droplets (emulsion-filled gels), or a network of aggregated emulsion droplets (emulsion particulate gels). In this study, a novel emulsion gel was prepared by formulating an oil-in-water (O/W) emulsion stabilized by sanxan alone, followed by heating and cooling treatment, resulting in a structured solid system. Stable O/W type sanxan emulsion gels (SEGs) were obtained at sanxan concentration >0.5% (w/w). Fluorescence microscopy results confirmed the adsorption of sanxan on oil droplet surfaces. The effect of temperature and sanxan/oil concentrations on the rheological and textural properties of the SEGs was evaluated: the SEG containing 1% (w/w) sanxan and 20% (w/w) sunflower oil exhibited excellent rheological and textural properties. Further, the addition of 10 mM Na+ or 5 mM Ca2+ greatly enhanced the thermostability of the SEG. The potential of SEGs as sustained-release delivery systems for β-carotene was also explored. The findings are of great interest for the development of novel delivery systems based on emulsion gels stabilized by sanxan for the sustained release of lipophilic components.
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175
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COSTA JND, BRITO SA, LEAL AR, RODRIGUES DDC, NASCIMENTO LGL, FIGUEIREDO RW, MATA P, SOUSA PHMD. Sensory characteristics of structured guava (Psidium guajava): comparison of optimized descriptive profile, cata and sensory acceptance methods. FOOD SCIENCE AND TECHNOLOGY 2020. [DOI: 10.1590/fst.25819] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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176
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Shinsho A, Brenner T, Descallar FB, Tashiro Y, Ando N, Zhou Y, Ogawa H, Matsukawa S. The thickening properties of native gellan gum are due to freeze drying–induced aggregation. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105997] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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177
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Tiwari U, Ganesan NG, Junnarkar J, Rangarajan V. Toward the formulation of bio-cosmetic nanoemulsions: from plant-derived to microbial-derived ingredients. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1847664] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Utkarsh Tiwari
- Department of Chemical Engineering, Birla Institute of Technology and Science-Pilani, K.K. Birla Goa Campus, Zuarinagar, Goa, India
| | - Neela Gayathri Ganesan
- Department of Chemical Engineering, Birla Institute of Technology and Science-Pilani, K.K. Birla Goa Campus, Zuarinagar, Goa, India
| | - Jui Junnarkar
- Department of Chemical Engineering, Birla Institute of Technology and Science-Pilani, K.K. Birla Goa Campus, Zuarinagar, Goa, India
| | - Vivek Rangarajan
- Department of Chemical Engineering, Birla Institute of Technology and Science-Pilani, K.K. Birla Goa Campus, Zuarinagar, Goa, India
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178
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Fisch P, Holub M, Zenobi-Wong M. Improved accuracy and precision of bioprinting through progressive cavity pump-controlled extrusion. Biofabrication 2020; 13. [PMID: 33086207 DOI: 10.1088/1758-5090/abc39b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 10/21/2020] [Indexed: 12/26/2022]
Abstract
3D bioprinting has seen a tremendous growth in recent years in a variety of fields such as tissue engineering, drug testing and regenerative medicine, which has led researchers and manufacturers to continuously advance and develop novel bioprinting techniques and materials. Although new bioprinting methods are emerging (e.g. contactless and volumetric bioprinting), micro-extrusion bioprinting remains the most widely used method. Micro-extrusion bioprinting, however, is still largely dependent on the conventional pneumatic extrusion process, which relies heavily on homogenous biomaterial inks and bioinks to maintain a constant material flow rate. Augmenting the functionality of the bioink with the addition of nanoparticles, cells or biopolymers can induce inhomogeneities resulting in uneven material flow during printing and/or clogging of the nozzle, leading to defects in the printed construct. In this work, we evaluated a novel extrusion technique based on a miniaturized progressive cavity pump which allows precise control over the volumetric flow rate by positive displacement. We compared the accuracy and precision of this system to the pneumatic extrusion system and tested both systems for their effect on cell viability after extrusion. The progressive cavity pump achieved a significantly higher accuracy and precision compared to the pneumatic system, while maintaining good viability. These improvements were independent of the bioink composition, printing speed or nozzle size. This study demonstrates the merit of precise extrusion-process control in bioprinting by progressive cavity pumps and investigates their influence on process-induced cell damage. Progressive cavity pumps are a promising tool for bioprinting and could help provide standardized and validated bioprinted constructs while leaving the researcher more freedom in the design of the bioinks.
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Affiliation(s)
- Philipp Fisch
- HEST, ETH Zürich, Otto-Stern-Weg 7, HPL J15.2, Zurich, Zürich, 8093, SWITZERLAND
| | - Martin Holub
- Department of Health, Science & Technology (D-HEST), Eidgenossiche Technische Hochschule - Zurich, Zurich, SWITZERLAND
| | - Marcy Zenobi-Wong
- Department of Health, Science & Technology (D-HEST), Eidgenossiche Technische Hochschule - Zurich, Zurich, SWITZERLAND
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179
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Duncan TT, Sarapas JM, Defante AP, Beers KL, Chan EP. Cutting to measure the elasticity and fracture of soft gels. SOFT MATTER 2020; 16:8826-8831. [PMID: 33026040 DOI: 10.1039/d0sm01174f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The fracture properties of very soft and/or brittle materials are challenging to measure directly due to the limitations of existing fracture testing methods. To address this issue, we introduce a razorblade-initiated fracture test (RIFT) to measure the mechanical properties related to fracture for soft polymeric gels. We use RIFT to quantify the elasticity, crack initiation energy, and the fracture energy of gellan hydrogels as a function of gellan concentration. Additionally, we use RIFT to study the role of friction in quantifying the fracture properties for poly(styrene-b-ethylene butadiene-b-styrene) gels as a function of test velocity. This new method provides a simple and efficient means to quantify the fracture properties of soft materials.
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Affiliation(s)
- Teresa T Duncan
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
| | - Joel M Sarapas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
| | - Adrian P Defante
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
| | - Kathryn L Beers
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
| | - Edwin P Chan
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
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180
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Nooshkam M, Varidi M. Whey protein isolate-low acyl gellan gum Maillard-based conjugates with tailored technological functionality and antioxidant activity. Int Dairy J 2020. [DOI: 10.1016/j.idairyj.2020.104783] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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181
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Nair R, Roy Choudhury A. Synthesis and rheological characterization of a novel shear thinning levan gellan hydrogel. Int J Biol Macromol 2020; 159:922-930. [DOI: 10.1016/j.ijbiomac.2020.05.119] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 05/11/2020] [Accepted: 05/15/2020] [Indexed: 12/20/2022]
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182
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New gellan gum-graft-poly(d,l-lactide-co-glycolide) copolymers as promising bioinks: Synthesis and characterization. Int J Biol Macromol 2020; 162:1653-1667. [PMID: 32777413 DOI: 10.1016/j.ijbiomac.2020.07.254] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/14/2020] [Accepted: 07/20/2020] [Indexed: 01/07/2023]
Abstract
This research focused on the aim of tackling the urgent demand of printable biomaterials, hence we synthetized and characterized three gellan gum-graft-poly(d,l-lactide-co-glycolide) copolymers (GGm-PLGA a, b and c) which differed in the graft substitution degree. We investigated the effect of the polyester chain grafted onto hydrophilic backbone of gellan gum in terms of physicochemical properties and the ability of the system to print 3D cell laden constructs. In particular, we evaluated thermo-rheological, ionotropic crosslinking, shear thinning, swelling and stability properties of these copolymers and their derived biomaterials and findings related to the degree of functionalization. Moreover, the optimization of the 3D process parameters and the effect of different water/DPBS mixtures was investigated, demonstrating the feasibility of the system to print 3D constructs. Finally, biological tests revealed that fibroblasts and chondrocytes remained viable after printing and over a culture period of seven days into scaffolds.
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183
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Yang X, Li A, Li X, Sun L, Guo Y. An overview of classifications, properties of food polysaccharides and their links to applications in improving food textures. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.05.020] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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184
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Biomimicry of microbial polysaccharide hydrogels for tissue engineering and regenerative medicine – A review. Carbohydr Polym 2020; 241:116345. [DOI: 10.1016/j.carbpol.2020.116345] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/13/2020] [Accepted: 04/17/2020] [Indexed: 12/17/2022]
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185
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Li A, Gong T, Li X, Li X, Yang X, Guo Y. Preparation of thermally stable emulsion gels based on Glucono-δ-lactone induced gelation of gellan gum. Int J Biol Macromol 2020; 156:565-575. [DOI: 10.1016/j.ijbiomac.2020.04.099] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/11/2020] [Accepted: 04/14/2020] [Indexed: 01/24/2023]
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186
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Di Napoli B, Franco S, Severini L, Tumiati M, Buratti E, Titubante M, Nigro V, Gnan N, Micheli L, Ruzicka B, Mazzuca C, Angelini R, Missori M, Zaccarelli E. Gellan Gum Microgels as Effective Agents for a Rapid Cleaning of Paper. ACS APPLIED POLYMER MATERIALS 2020; 2:2791-2801. [PMID: 32685926 PMCID: PMC7359273 DOI: 10.1021/acsapm.0c00342] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 05/27/2020] [Indexed: 05/21/2023]
Abstract
Microgel particles have emerged in the past few years as a favorite model system for fundamental science and for innovative applications ranging from the industrial to biomedical fields. Despite their potentialities, no works so far have focused on the application of microgels for cultural heritage preservation. Here we show their first use for this purpose, focusing on wet paper cleaning. Exploiting their retentive properties, microgels are able to clean paper, ensuring more controlled water release from the gel matrix, in analogy to their macroscopic counterpart, i.e., hydrogels. However, differently from these, the reduced size of microgels makes them suitable to efficiently penetrate in the porous structure of the paper and to easily adapt to the irregular surfaces of the artifacts. To test their cleaning abilities, we prepare microgels made of Gellan gum, a natural and widespread material already used as a hydrogel for paper cleaning, and apply them to modern and ancient paper samples. Combining several diagnostic methods, we show that microgels performances in the removal of cellulose degradation byproducts for ancient samples are superior to commonly employed hydrogels and water bath treatments. This is due to the composition and morphology of ancient paper, which facilitates microgels penetration. For modern paper cleaning, performances are at least comparable to the other methods. In all cases, the application of microgels takes place on a time scale of a few minutes, opening the way for widespread use as a rapid and efficient cleaning protocol.
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Affiliation(s)
- Benedetta Di Napoli
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Silvia Franco
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Leonardo Severini
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Manuel Tumiati
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Elena Buratti
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Mattia Titubante
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Valentina Nigro
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
- ENEA
C.R. Frascati, FSN-TECFIS-MNF
Photonics Micro and Nanostructures Laboratory, Via E. Fermi 45, 00044 Frascati, Roma, Italy
| | - Nicoletta Gnan
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Laura Micheli
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Barbara Ruzicka
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Claudia Mazzuca
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Roberta Angelini
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Mauro Missori
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Emanuela Zaccarelli
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
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187
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Battigelli A, Almeida B, Shukla S, Rocha AD, Shukla A. Inducing mesenchymal stem cell attachment on non-cell adhesive hydrogels through click chemistry. Chem Commun (Camb) 2020; 56:7661-7664. [PMID: 32520061 DOI: 10.1039/d0cc03403g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We introduce an innovative approach to adhere mesenchymal stem cells (MSCs) to a hydrogel scaffold by nucleating adhesion through strain-promoted click chemistry. This method yields a significant increase in cell viability compared to non-functionalized and RGD peptide functionalized hydrogels, providing a promising alternative to traditional biomaterials cell attachment approaches.
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Affiliation(s)
- Alessia Battigelli
- School of Engineering, Center for Biomedical Engineering, Institute for Molecular and Nanoscale Innovation, Brown University, Providence, Rhode Island 02912, USA.
| | - Bethany Almeida
- School of Engineering, Center for Biomedical Engineering, Institute for Molecular and Nanoscale Innovation, Brown University, Providence, Rhode Island 02912, USA.
| | - Shashank Shukla
- School of Engineering, Center for Biomedical Engineering, Institute for Molecular and Nanoscale Innovation, Brown University, Providence, Rhode Island 02912, USA.
| | - Alicia D Rocha
- School of Engineering, Center for Biomedical Engineering, Institute for Molecular and Nanoscale Innovation, Brown University, Providence, Rhode Island 02912, USA.
| | - Anita Shukla
- School of Engineering, Center for Biomedical Engineering, Institute for Molecular and Nanoscale Innovation, Brown University, Providence, Rhode Island 02912, USA.
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188
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189
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Senjoti FG, Timmins P, Conway BR, Smith AM. Optimizing ophthalmic delivery of a poorly water soluble drug from an aqueous in situ gelling system. Eur J Pharm Biopharm 2020; 154:1-7. [PMID: 32599271 DOI: 10.1016/j.ejpb.2020.06.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 05/26/2020] [Accepted: 06/22/2020] [Indexed: 12/24/2022]
Abstract
Poorly soluble drugs are often unsuitable to incorporate in ocular in situ gelling systems due to the aqueous based gelling formulations and low volumes administered. For such formulations to be successful, the administered drug must have sufficient solubility to diffuse from the formulation to the eye and should not affect the gelation of the in situ gelling material. Drug salt forms can improve the solubility of poorly soluble drugs, however, as in situ gel forming formulations are often designed to be crosslinked by salts (present the lacrimal fluid) it can make salt forms difficult to formulate. The aim of this study was to develop an in situ gel forming ophthalmic formulation of a poorly soluble drug flurbiprofen (FBP) through cyclodextrin complex formation and to analyse the impact on gelation, release and permeation through the cornea. Hydroxypropyl-beta-cyclodextrin (HβCD) was used as a complexing agent and low acyl gellan gum was added to the FBP- HβCD complex as a water soluble in situ gelling polymer. Measurements were performed using rheo-dissolution, which utilises a rheometer with a modified lower plate that has the unique ability to allow rheological measurement and analysis of drug release simultaneously. An ex-vivo permeation study was also performed using porcine cornea. Rheological measurements in terms of elastic (G') and viscous (G″) modulus showed rapid gelation of the formulation upon contact with simulated lacrimal fluid (SLF). Approximately, 97% FBP was released when 10% HβCD was used and release was decreased to 79% when the amount of HβCD was increased to 20%. The percentage of drug permeation through the cornea was 55% in 300 min whereas the marketed non gelling eye drop formulation containing FBP sodium showed only 37% permeation. The data presented here, revealed that not only could a poorly soluble drug be complexed with cyclodextrin and loaded into an in situ gelling system without interfering with the gelation, but also permeability the of the drug improved.
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Affiliation(s)
- F G Senjoti
- Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
| | - P Timmins
- Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
| | - B R Conway
- Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
| | - A M Smith
- Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK.
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190
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Santos TP, Costa ALR, Michelon M, Costa LP, Cunha RL. Development of a microfluidic route for the formation of gellan-based microgels incorporating jabuticaba (Myrciaria cauliflora) extract. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2019.109884] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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191
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Youssef A, Dudhipala N, Majumdar S. Ciprofloxacin Loaded Nanostructured Lipid Carriers Incorporated into In-Situ Gels to Improve Management of Bacterial Endophthalmitis. Pharmaceutics 2020; 12:E572. [PMID: 32575524 PMCID: PMC7356176 DOI: 10.3390/pharmaceutics12060572] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 12/21/2022] Open
Abstract
Bacterial endophthalmitis (BE) is a potentially sight-threatening inflammatory reaction of the intraocular fluids or tissues caused by bacteria. Ciprofloxacin (CIP) eye drops are prescribed as first-line therapy in BE. However, frequent administration is necessary due to precorneal loss and poor ocular bioavailability. The objective of the current research was to prepare CIP containing nanostructured lipid carriers (CIP-NLCs) loaded an in situ gel system (CIP-NLC-IG) for topical ocular administration for enhanced and sustained antibacterial activity in BE treatment. CIP-NLCs were prepared by the hot homogenization method and optimized based on physicochemical characteristics and physical stability. The optimized CIP-NLC formulation was converted into CIP-NLC-IG with the addition of gellan gum as a gelling agent. Furthermore, optimized CIP-NLC and CIP-NLC-IG were evaluated for in vitro release and ex vivo transcorneal permeation studies, using commercial CIP ophthalmic solution (CIP-C) as the control. The optimized CIP-NLC formulation showed particle size, polydispersity index, zeta potential, assay and entrapment efficiency of 193.1 ± 5.1 nm, 0.43 ± 0.01, -32.5 ± 1.5 mV, 99.5 ± 5.5 and 96.3 ± 2.5%, respectively. CIP-NLC-IG with 0.2% w/v gellan gum showed optimal viscoelastic characteristics. The in vitro release studies demonstrated sustained release of CIP from CIP-NLC and CIP-NLC-IG formulations over a 24 h period. Transcorneal flux and permeability increased 4 and 3.5-fold, and 2.2 and 1.9-fold from CIP-NLC and CIP-NLC-IG formulations, respectively, when compared to CIP-C. The results demonstrate that CIP-NLC-IG could be considered as an alternate delivery system to prolong the residence time on the ocular surface after topical administration. Thus, the current CIP ophthalmic formulations may exhibit improved ocular bioavailability and prolonged antibacterial activity, which may improve therapeutic outcomes in the treatment of BE.
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Affiliation(s)
- Ahmed Youssef
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh 33516, Egypt;
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, University of Mississippi, Oxford, MS 38677, USA;
| | - Narendar Dudhipala
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, University of Mississippi, Oxford, MS 38677, USA;
| | - Soumyajit Majumdar
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, University of Mississippi, Oxford, MS 38677, USA;
- Research Institute of Pharmaceutical Sciences, University of Mississippi, Oxford, MS 38677, USA
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192
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Li X, He X, Mao L, Gao Y, Yuan F. Modification of the structural and rheological properties of β-lactoglobulin/κ-carrageenan mixed gels induced by high pressure processing. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2019.109851] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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193
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Fan R, Zhou D, Cao X. Evaluation of oat β-glucan-marine collagen peptide mixed gel and its application as the fat replacer in the sausage products. PLoS One 2020; 15:e0233447. [PMID: 32442194 PMCID: PMC7244152 DOI: 10.1371/journal.pone.0233447] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/05/2020] [Indexed: 11/19/2022] Open
Abstract
The food industry is currently shown the concern with low-fat products. This study aims to evaluate the properties of oat β-glucan(OG)-marine collagen peptide (MCP) mixed gels induced by high pressure at different ratios, pressures, pH levels and the superiority of application in the sausage. The results indicated that the typical gel with high levels of hardness, cohesiveness, springiness, and chewiness, as well as high water holding and oil adsorption capacities was formed using the OG/MCP ratio of 10:1 under 400 MPa at pH 6.0. The mixed gel replacing with 50% fat significantly increased the springiness and chewing(P<0.05), and sausages with 80% mixed gel were significantly juicier than that of the control sausage(P<0.05). Therefore, OG-MCP mixed gel could be used in the reformulation of low-fat meat products to enhance their safety and nutritional value.
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Affiliation(s)
- Rui Fan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing, P. R. China
- Department of Nutrition and Food Hygiene, School of Public Health, Peking University, Beijing, P. R. China
| | - Dan Zhou
- School of Life Science and Technology, Beijing University of Chemical Technology, Beijing, P. R. China
| | - Xueli Cao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing, P. R. China
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194
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Ahmed J, Thomas L, Mulla M. High‐pressure treatment of hummus in selected packaging materials: Influence on texture, rheology, and microstructure. J FOOD PROCESS ENG 2020. [DOI: 10.1111/jfpe.13425] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jasim Ahmed
- Food & Nutrition Program, Environment & Life Sciences Research CenterKuwait Institute for Scientific Research Safat Kuwait
| | - Linu Thomas
- Food & Nutrition Program, Environment & Life Sciences Research CenterKuwait Institute for Scientific Research Safat Kuwait
| | - Mehrajfatema Mulla
- Food & Nutrition Program, Environment & Life Sciences Research CenterKuwait Institute for Scientific Research Safat Kuwait
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195
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Jelkmann M, Leichner C, Zaichik S, Laffleur F, Bernkop-Schnürch A. A gellan gum derivative as in-situ gelling cationic polymer for nasal drug delivery. Int J Biol Macromol 2020; 158:1037-1046. [PMID: 32380110 DOI: 10.1016/j.ijbiomac.2020.04.114] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 03/10/2020] [Accepted: 04/16/2020] [Indexed: 12/13/2022]
Abstract
The aim of the present study was the development of a novel gellan gum derivative exhibiting mucoadhesive properties for nasal application. Accomplishing this, amino groups have been introduced to the polymeric backbone. The resulting synthesis products were characterized in terms of the amount of attached amino groups, regarding hydration, zeta potential and gel characteristics. Mucoadhesiveness was assessed studying rheological synergism, by rotating cylinder and regarding tensile studies. Next to erythrocyte-/cytotoxicity evaluation, the impact on ciliary beat frequency of nasal epithelial cells was investigated. Results revealed coupling rates up to 1259.50 ± 75.98 μmol/g polymer as well as accelerated hydration of the derivatives. Comparing aminated with unmodified gellan, enhanced mucoadhesion was verified by a 32-fold increase in viscosity of polymer/mucus mixtures and by a 14-fold extended mucosal adhesion time. Tensile studies demonstrated a 9-fold higher total work of adhesion and a 3.75-fold elevated maximum detachment force. Cellular membrane was not seriously impaired. CBF studies proved a reversible inhibition due to the application of the novel derivative. According to the outlined findings, aminated gellan gum can be considered as a promising excipient for nasal dosage forms improving drug bioavailability by superior adhesive features.
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Affiliation(s)
- Max Jelkmann
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Christina Leichner
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Sergey Zaichik
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Flavia Laffleur
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Andreas Bernkop-Schnürch
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria.
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196
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Nishinari K, Ishihara S, Hori K, Fang Y. Tongue-palate squeezing of soft gels in food oral processing. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.02.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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197
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Interpenetrating network gels with tunable physical properties: Glucono-δ-lactone induced gelation of mixed Alg/gellan sol systems. Int J Biol Macromol 2020; 151:257-267. [DOI: 10.1016/j.ijbiomac.2020.02.107] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/08/2020] [Accepted: 02/10/2020] [Indexed: 11/21/2022]
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198
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Huang M, Zhang M, Guo C. 3D printability of brown rice gel modified by some food hydrocolloids. J FOOD PROCESS PRES 2020. [DOI: 10.1111/jfpp.14502] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Meng‐sha Huang
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi China
- Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan University Wuxi China
| | - Min Zhang
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi China
- International Joint Laboratory on Food Safety Jiangnan University Wuxi China
| | - Chao‐fan Guo
- State Key Laboratory of Food Science and Technology Jiangnan University Wuxi China
- Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan University Wuxi China
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199
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Destruel PL, Zeng N, Brignole-Baudouin F, Douat S, Seguin J, Olivier E, Dutot M, Rat P, Dufaÿ S, Dufaÿ-Wojcicki A, Maury M, Mignet N, Boudy V. In Situ Gelling Ophthalmic Drug Delivery System for the Optimization of Diagnostic and Preoperative Mydriasis: In Vitro Drug Release, Cytotoxicity and Mydriasis Pharmacodynamics. Pharmaceutics 2020; 12:E360. [PMID: 32326492 PMCID: PMC7238180 DOI: 10.3390/pharmaceutics12040360] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/08/2020] [Accepted: 04/13/2020] [Indexed: 11/16/2022] Open
Abstract
Mydriasis is required prior to many eye examinations and ophthalmic surgeries. Nowadays, phenylephrine hydrochloride (PHE) and tropicamide (TPC) are extensively used to induce mydriasis. Several pharmaceutic dosage forms of these two active ingredients have been described. However, no optimal therapeutic strategy has reached the market. The present work focuses on the formulation and evaluation of a mucoadhesive ion-activated in situ gelling delivery system based on gellan gum and hydroxyethylcellulose (HEC) for the delivery of phenylephrine and tropicamide. First, in vitro drug release was studied to assess appropriate sustained drug delivery on the ocular surface region. Drug release mechanisms were explored and explained using mathematical modeling. Then, in situ gelling delivery systems were visualized using scanning electron microscopy illustrating the drug release phenomena involved. Afterward, cytotoxicity of the developed formulations was studied and compared with those of commercially available eye drops. Human epithelial corneal cells were used. Finally, mydriasis intensity and kinetic was investigated in vivo. Mydriasis pharmacodynamics was studied by non-invasive optical imaging on vigilant rabbits, allowing eye blinking and nasolacrimal drainage to occur physiologically. In situ gelling delivery systems mydriasis profiles exhibited a significant increase of intensity and duration compared with those of conventional eye drops. Efficient mydriasis was achieved following the administration of a single drop of in situ gel reducing the required amount of administered active ingredients by four- to eight-fold compared with classic eye drop regimen.
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Affiliation(s)
- Pierre-Louis Destruel
- Unither Développement Bordeaux, ZA Tech Espace, av Toussaint Catros, 33185 Le Haillan, France;
- Département Recherche et Développement Pharmaceutique, Agence Générale des Equipements et Produits de Santé (AGEPS), AP-HP, 7 rue du fer à moulin, 75005 Paris, France (V.B.)
- Université de Paris, UTCBS, CNRS, INSERM, Faculté de Pharmacie, 4 av de l’observatoire, 75006 Paris, France
| | - Ni Zeng
- Unither Pharmaceuticals, 3-5 rue St-Georges, 75009 Paris, France
| | - Françoise Brignole-Baudouin
- UMR CNRS 8038-Chimie Toxicologie Analytique et Cellulaire, 75006 Paris, France
- CNRS UMR 7210-Inserm UMR_S 968, Institut de la Vision, 75012 Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DHOS, CIC 503, 75012 Paris, France
| | - Sophie Douat
- Département Recherche et Développement Pharmaceutique, Agence Générale des Equipements et Produits de Santé (AGEPS), AP-HP, 7 rue du fer à moulin, 75005 Paris, France (V.B.)
| | - Johanne Seguin
- Université de Paris, UTCBS, CNRS, INSERM, Faculté de Pharmacie, 4 av de l’observatoire, 75006 Paris, France
| | - Elodie Olivier
- UMR CNRS 8038-Chimie Toxicologie Analytique et Cellulaire, 75006 Paris, France
| | - Melody Dutot
- UMR CNRS 8038-Chimie Toxicologie Analytique et Cellulaire, 75006 Paris, France
- Recherche et Développement, Laboratoire d’Evaluation Physiologique, Yslab, 2 rue Félix le Dantec, 29000 Quimper, France
| | - Patrice Rat
- UMR CNRS 8038-Chimie Toxicologie Analytique et Cellulaire, 75006 Paris, France
| | - Sophie Dufaÿ
- Département Recherche et Développement Pharmaceutique, Agence Générale des Equipements et Produits de Santé (AGEPS), AP-HP, 7 rue du fer à moulin, 75005 Paris, France (V.B.)
| | - Amélie Dufaÿ-Wojcicki
- Département Recherche et Développement Pharmaceutique, Agence Générale des Equipements et Produits de Santé (AGEPS), AP-HP, 7 rue du fer à moulin, 75005 Paris, France (V.B.)
| | - Marc Maury
- Unither Pharmaceuticals, 3-5 rue St-Georges, 75009 Paris, France
| | - Nathalie Mignet
- Université de Paris, UTCBS, CNRS, INSERM, Faculté de Pharmacie, 4 av de l’observatoire, 75006 Paris, France
| | - Vincent Boudy
- Département Recherche et Développement Pharmaceutique, Agence Générale des Equipements et Produits de Santé (AGEPS), AP-HP, 7 rue du fer à moulin, 75005 Paris, France (V.B.)
- Université de Paris, UTCBS, CNRS, INSERM, Faculté de Pharmacie, 4 av de l’observatoire, 75006 Paris, France
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200
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Shukla S, Favata J, Srivastava V, Shahbazmohamadi S, Tripathi A, Shukla A. Effect of polymer and ion concentration on mechanical and drug release behavior of gellan hydrogels using factorial design. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20190205] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Shashank Shukla
- School of Engineering, Brown University Providence Rhode Island USA
- Center for Biomedical Engineering Brown University Providence Rhode Island USA
| | - Joseph Favata
- REFINE Lab University of Connecticut Storrs Connecticut USA
| | - Vikas Srivastava
- School of Engineering, Brown University Providence Rhode Island USA
- Center for Biomedical Engineering Brown University Providence Rhode Island USA
| | | | - Anubhav Tripathi
- School of Engineering, Brown University Providence Rhode Island USA
- Center for Biomedical Engineering Brown University Providence Rhode Island USA
- Institute for Molecular and Nanoscale Innovation, Brown University Providence Rhode Island USA
| | - Anita Shukla
- School of Engineering, Brown University Providence Rhode Island USA
- Center for Biomedical Engineering Brown University Providence Rhode Island USA
- Institute for Molecular and Nanoscale Innovation, Brown University Providence Rhode Island USA
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