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Shang J, Duan L, Zhang W, Zhuang Q, Ren X, Gu D. The effect of Bletilla striata polysaccharide on the physical and healing properties of curdlan-based hydrogel for wound healing. J Biomater Appl 2024; 38:943-956. [PMID: 38462970 DOI: 10.1177/08853282241238409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Bletilla striata polysaccharide (BSP) was added to curdlan to form a blend hydrogel through a simple heating-cooling procedure to improve the hydrophilicity and healing efficacy of curdlan-based hydrogel used in wound healing. We explored the interplay between BSP and curdlan, studied how BSP concentration affects the physical properties and microstructures of hydrogels, and examined the biocompatibility and healing properties of the blend hydrogel. It was proved that the hydrogel framework was primarily formed by ordered arranged curdlan molecules, with BSP uniformly dispersed and intertwined with curdlan through hydrogen bonding. This effectively improved its hydrophilicity and strengthened the microstructure. Curdlan was found to be compatible with BSP. The blend hydrogel B3Cd3 (containing 1.5% BSP and 1.5% curdlan, w/v) was identified as the optimal formulation based on its higher water adsorption, water retention, thermal stability and interconnected microstructure, and was thus selected for further research. In vitro experiments revealed the highest cell viability of L929 in B3Cd3 extracts compared to those extracts of single-component curdlan hydrogel (Cd). In vivo, animal studies indicated that the B3Cd3 accelerated wound healing compared to the control group by improving re-epithelialization and blood vessel regeneration. On Days 3 and 11, the therapeutic benefits of B3Cd3 exceeded those of the Cd group, and no significant differences were observed in wound healing rates between the B and B3Cd3 groups from Day 7. The study proves that BSP enhances the physical and healing properties, as well as cell proliferation, of the curdlan-based hydrogel. The blend hydrogel B3Cd3, with its exceptional properties, holds potential for future application as a material for non-infected wound healing.
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Affiliation(s)
- Jin Shang
- School of Public Health, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Liangliang Duan
- School of Public Health, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Weimin Zhang
- Administration for Drug and Instrument Supervision and Inspection of PLAJLSF, Beijing, China
| | - Qibin Zhuang
- College of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, China
| | - Xiaomei Ren
- School of Public Health, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Dale Gu
- Technical Department, Anhui Xiletianyuan Food Co., Ltd, Anqing, China
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Dai MQ, Wang XC, Gao LY, Zhang LC, Lai B, Wang C, Yan JN, Wu HT. Effect of black wolfberry anthocyanin and maltitol on the gelation and microstructural properties of curdlan/gellan gum hybrid gels. J Sci Food Agric 2024; 104:3749-3756. [PMID: 38234140 DOI: 10.1002/jsfa.13259] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 12/27/2023] [Accepted: 12/31/2023] [Indexed: 01/19/2024]
Abstract
BACKGROUND Laboratory scale experiments have shown that curdlan and gellan gum gelled together as curdlan/gellan gum (CG) hybrid gels showed better gel properties than the individual curdlan and gellan gum. In this study, CG and black wolfberry anthocyanin (BWA), CG and maltitol (ML) hybrid gels were constructed using CG hybrid gel as matrix. The effects of BWA or ML on the gel properties and microstructure of CG hybrid gels were investigated and a confectionery gel was developed. RESULTS The presence of BWA increased the storage modulus (G') value of CG at 0.1 Hz, whereas ML had little effect on the G' value of CG. The addition of BWA (5 g L-1 ) and ML (0.3 mol L-1 ) increased the melting and gelling temperatures of CG hybrid gels to 42.4 °C and 34.1 °C and 44.2 °C and 33.2 °C, respectively. Meanwhile, the relaxation time T22 in CG-ML and CG-BWA hybrid gels was reduced to 91.96 and 410.27 ms, indicating the strong binding between BWA and CG, ML and CG. The hydrogen bond interaction between BWA or ML and CG was confirmed by the shift in the hydroxyl stretching vibration peak. Moreover, the microstructures of CG-ML and CG-BWA hybrid gels were denser than that of CG. In addition, confectionery gel containing CG-BWA-ML has good chewing properties. CONCLUSION These results indicated that the incorporation of BWA or ML could improve the structure of CG hybrid gels and assign a sustainability potential for the development of confectionery gels based on CG complex. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Meng-Qi Dai
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
| | - Xue-Chen Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
| | - Ling-Yi Gao
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
| | - Li-Chao Zhang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Dalian, China
- Institutes of Biomedical Sciences, Shanxi University, Taiyuan, China
| | - Bin Lai
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Dalian, China
| | - Ce Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Dalian, China
| | - Jia-Nan Yan
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Dalian, China
| | - Hai-Tao Wu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Dalian, China
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Fei C, Liu L, Qi H, Peng Y, Han J, Wang C, Li X. Curdlan-Decorated Fullerenes Mitigate Immune-Mediated Hepatic Injury for Autoimmune Hepatitis Therapeutics via Reducing Macrophage Infiltration. ACS Appl Mater Interfaces 2024; 16:5536-5547. [PMID: 38267397 PMCID: PMC10860698 DOI: 10.1021/acsami.3c16168] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 12/23/2023] [Accepted: 01/11/2024] [Indexed: 01/26/2024]
Abstract
Autoimmune hepatitis (AIH) is a severe immune-mediated inflammatory liver disease whose standard of care is immunosuppressive treatment with inevitable undesired outcomes. Macrophage is acknowledged to aggravate liver damage, providing a promising AIH therapeutic target. Accordingly, in this study, a kind of curdlan-decorated fullerene nanoparticle (Cur-F) is fabricated to alleviate immune-mediated hepatic injury for treating AIH via reducing macrophage infiltration in a concanavalin A (Con A)-induced AIH mouse model. After intravenous administration, Cur-F primarily distributes in liver tissues, efficiently eliminates the excessive reactive oxygen species, significantly attenuates oxidative stress, and subsequently suppresses the nuclear factor kappa-B-gene binding (NF-κB) signal pathway, resulting in the lowered production of pro-inflammatory cytokines and the balancing of the immune homeostasis with the prevention of macrophage infiltration in the liver. The regulation of hepatic inflammation contributes to inhibiting inflammatory cytokines-induced hepatocyte apoptosis, decreasing the serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) contents and thus ameliorating immune-mediated hepatic injury. Notably, there is no detectable toxicity to the body. Our findings may open up novel avenues for AIH based on curdlan and fullerene materials.
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Affiliation(s)
- Chenglong Fei
- Key
Laboratory of Molecular Nanostructure and Nanotechnology, Beijing
National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School
of Chemistry and Chemical Engineering, Inner
Mongolia University, Inner
Mongolia 010021, China
| | - Lei Liu
- Key
Laboratory of Molecular Nanostructure and Nanotechnology, Beijing
National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Hedong Qi
- Key
Laboratory of Molecular Nanostructure and Nanotechnology, Beijing
National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuyang Peng
- Key
Laboratory of Molecular Nanostructure and Nanotechnology, Beijing
National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingfen Han
- School
of Chemistry and Chemical Engineering, Inner
Mongolia University, Inner
Mongolia 010021, China
| | - Chunru Wang
- Key
Laboratory of Molecular Nanostructure and Nanotechnology, Beijing
National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Xue Li
- Key
Laboratory of Molecular Nanostructure and Nanotechnology, Beijing
National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
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Yu Y, Liu K, Zhang S, Zhang L, Chang J, Jing Z. Characterizations of Water-Soluble Chitosan/ Curdlan Edible Coatings and the Inhibitory Effect on Postharvest Pathogenic Fungi. Foods 2024; 13:441. [PMID: 38338576 PMCID: PMC10855209 DOI: 10.3390/foods13030441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/24/2024] [Accepted: 01/26/2024] [Indexed: 02/12/2024] Open
Abstract
This study focused on developing a composite coating comprising water-soluble chitosan (CTS) and curdlan (CUR). Cherry tomatoes served as the test material for assessing the preservative efficacy of these coatings. The incorporation of CUR markedly enhanced the coating's surface properties, refined its molecular structure, and improved its tensile strength and elongation at break. Additionally, the coating demonstrated enhanced permeability to water vapor, oxygen, and carbon dioxide and improved light transmission. The storage experiment, conducted at 25 ± 1 °C with a relative humidity of approximately 92% over 10 days, revealed that the CTS/CUR composite coating at a 1:1 ratio significantly outperformed the individual CTS or CUR coating and uncoated samples in maintaining the quality of postharvest cherry tomatoes. The 1:1 CTS/CUR composite coating demonstrated superior preservative effects. This study suggested that water-soluble chitosan/curdlan composite coatings have considerable potential for use in the preservation of postharvest fruits and vegetables.
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Affiliation(s)
- Youwei Yu
- College of Food Science, Shanxi Normal University, Taiyuan 030031, China; (K.L.); (S.Z.); (L.Z.); (J.C.); (Z.J.)
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5
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McIntosh M. Genetic Engineering of Agrobacterium Increases Curdlan Production through Increased Expression of the crdASC Genes. Microorganisms 2023; 12:55. [PMID: 38257882 PMCID: PMC10819609 DOI: 10.3390/microorganisms12010055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/26/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024] Open
Abstract
Curdlan is a water-insoluble polymer that has structure and gelling properties that are useful in a wide variety of applications such as in medicine, cosmetics, packaging and the food and building industries. The capacity to produce curdlan has been detected in certain soil-dwelling bacteria of various phyla, although the role of curdlan in their survival remains unclear. One of the major limitations of the extensive use of curdlan in industry is the high cost of production during fermentation, partly because production involves specific nutritional requirements such as nitrogen limitation. Engineering of the industrially relevant curdlan-producing strain Agrobacterium sp. ATTC31749 is a promising approach that could decrease the cost of production. Here, during investigations on curdlan production, it was found that curdlan was deposited as a capsule. Curiously, only a part of the bacterial population produced a curdlan capsule. This heterogeneous distribution appeared to be due to the activity of Pcrd, the native promoter responsible for the expression of the crdASC biosynthetic gene cluster. To improve curdlan production, Pcrd was replaced by a promoter (PphaP) from another Alphaproteobacterium, Rhodobacter sphaeroides. Compared to Pcrd, PphaP was stronger and only mildly affected by nitrogen levels. Consequently, PphaP dramatically boosted crdASC gene expression and curdlan production. Importantly, the genetic modification overrode the strict nitrogen depletion regulation that presents a hindrance for maximal curdlan production and from nitrogen rich, complex media, demonstrating excellent commercial potential for achieving high yields using cheap substrates under relaxed fermentation conditions.
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Affiliation(s)
- Matthew McIntosh
- Institute of Microbiology and Molecular Biology, IFZ, Justus-Liebig-Universität, 35292 Giessen, Germany
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Kumagai K, Okubo H, Amano R, Kozu T, Ochiai M, Horiuchi M, Sakamoto T. Selection of aptamers using β-1,3-glucan recognition protein-tagged proteins and curdlan beads. J Biochem 2023; 174:433-440. [PMID: 37500079 DOI: 10.1093/jb/mvad059] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/22/2023] [Accepted: 07/26/2023] [Indexed: 07/29/2023] Open
Abstract
RNA aptamersare nucleic acids that are obtained using the systematic evolution of ligands by exponential enrichment (SELEX) method. When using conventional selection methods to immobilize target proteins on matrix beads using protein tags, sequences are obtained that bind not only to the target proteins but also to the protein tags and matrix beads. In this study, we performed SELEX using β-1,3-glucan recognition protein (GRP)-tags and curdlan beads to immobilize the acute myeloid leukaemia 1 (AML1) Runt domain (RD) and analysed the enrichment of aptamers using high-throughput sequencing. Comparison of aptamer enrichment using the GRP-tag and His-tag suggested that aptamers were enriched using the GRP-tag as well as using the His-tag. Furthermore, surface plasmon resonance analysis revealed that the aptamer did not bind to the GRP-tag and that the conjugation of the GRP-tag to RD weakened the interaction between the aptamer and RD. The GRP-tag could have acted as a competitor to reduce weakly bound RNAs. Therefore, the affinity system of the GRP-tagged proteins and curdlan beads is suitable for obtaining specific aptamers using SELEX.
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Key Words
- SELEX.Abbreviations:
AML1, acute myeloid leukaemia 1; βGRP, β-1,3-glucan recognition protein; GST, glutathione S-transferase; His-tag, poly histidine tag; HTS, high-throughput sequencing; MBP, maltose-binding protein; RD, Runt domain; RUNX1, RUNX family transcription factor 1; SELEX, systematic evolution of ligands by exponential enrichment; SPR, surface plasmon resonance
- aptamer
- curdlan
- βGRP
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Affiliation(s)
- Kazuyuki Kumagai
- Department of Life Science, Faculty of Advanced Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
| | - Hiroki Okubo
- Department of Life Science, Faculty of Advanced Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
| | - Ryo Amano
- Department of Life Science, Faculty of Advanced Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
| | - Tomoko Kozu
- Research Institute for Clinical Oncology, Saitama Cancer Center, 780 Komuro, Ina, Kitaadachi, Saitama 362-0806, Japan
| | - Masanori Ochiai
- Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-ku, Sapporo 060-0819, Japan
| | - Masataka Horiuchi
- Faculty of Pharmaceutical Science, Health Sciences University of Hokkaido, 1757 Kanazawa, Toubetsu, Ishikari, Hokkaido 061-0293, Japan
| | - Taiichi Sakamoto
- Department of Life Science, Faculty of Advanced Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
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Lin SH, Ou SL, Hsu HM, Wu JY. Preparation and Characteristics of Polyethylene Oxide/ Curdlan Nanofiber Films by Electrospinning for Biomedical Applications. Materials (Basel) 2023; 16:ma16103863. [PMID: 37241490 DOI: 10.3390/ma16103863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/16/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023]
Abstract
In this study, polyethylene oxide (PEO) and curdlan solutions were used to prepare PEO/curdlan nanofiber films by electrospinning using deionized water as the solvent. In the electrospinning process, PEO was used as the base material, and its concentration was fixed at 6.0 wt.%. Moreover, the concentration of curdlan gum varied from 1.0 to 5.0 wt.%. For the electrospinning conditions, various operating voltages (12-24 kV), working distances (12-20 cm) and feeding rates of polymer solution (5-50 μL/min) were also modified. Based on the experimental results, the optimum concentration for the curdlan gum was 2.0 wt.%. Additionally, the most suitable operating voltage, working distance and feeding rate for the electrospinning process were 19 kV, 20 cm and 9 μL/min, respectively, which can help to prepare relatively thinner PEO/curdlan nanofibers with higher mesh porosity and without the formation of beaded nanofibers. Finally, the PEO/curdlan nanofiber instant films containing 5.0 wt.% quercetin inclusion complex were used to perform wetting and disintegration processes. It was found that the instant film can be dissolved significantly on the low-moisture wet wipe. On the other hand, when the instant film touched water, it can be disintegrated very quickly within 5 s, and the quercetin inclusion complex was dissolved in water efficiently. Furthermore, when the instant film encountered the water vapor at 50 °C, it almost completely disintegrated after immersion for 30 min. The results indicate that the electrospun PEO/curdlan nanofiber film is highly feasible for biomedical applications consisting of instant masks and quick-release wound dressings, even in the water vapor environment.
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Affiliation(s)
- Shu-Hung Lin
- PhD Program of Biotechnology and Industry, College of Biotechnology and Bioresources, Da-Yeh University, Changhua 515, Taiwan
| | - Sin-Liang Ou
- Department of Biomedical Engineering, Da-Yeh University, Changhua 515, Taiwan
| | - Hung-Ming Hsu
- Department of Medicinal Botanicals and Foods on Health Applications, Da-Yeh University, Changhua 515, Taiwan
| | - Jane-Yii Wu
- Department of Medicinal Botanicals and Foods on Health Applications, Da-Yeh University, Changhua 515, Taiwan
- Biotechnology Research and Development Center, Da-Yeh University, Changhua 515, Taiwan
- Innovation Incubation Center, Da-Yeh University, Changhua 515, Taiwan
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8
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Xu X, Pan Y, Liu X, Han Z, Chen S. Constructing Selenium Nanoparticles with Enhanced Storage Stability and Antioxidant Activities via Conformational Transition of Curdlan. Foods 2023; 12. [PMID: 36766092 DOI: 10.3390/foods12030563] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/20/2023] [Accepted: 01/26/2023] [Indexed: 02/03/2023] Open
Abstract
Selenium nanoparticles (SeNPs) are among the emerging selenium supplements because of their high bioactivity and low toxicity. However, bare SeNPs are prone to activity loss caused by aggregation and sedimentation. This study aims to stabilize SeNPs with curdlan (CUR), a polysaccharide, to maintain or even enhance their biological activity. Herein, the stable SeNPs were constructed via the unique conformational transition of CUR induced by alkali-neutralization (AN) pretreatment. The physicochemical properties and structures of the prepared SeNPs were characterized by dynamic light scattering (DLS), UV-visible spectroscopy, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), and free-radical-scavenging activity assays. The results show that most SeNPs are stabilized within the triple helix of CUR that has been pretreated with high-intensity AN treatment. These amorphous, small-sized (average size was 53.6 ± 17.7 nm), and stabilized SeNPs have significantly enhanced free-radical-scavenging ability compared to the control and can be well-stabilized for at least 240 days at 4 °C. This work indicates that CUR, as a food additive, can be used to well-stabilize SeNPs by AN pretreatment and provides a facile method to prepare and enhance the stability and bioactivity of SeNPs via triple-helix conformational transition.
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Zhang L, Xu L, Ma JK, Ye YY, Chen Y, Qian JY. Introduction of Curdlan Optimizes the Comprehensive Properties of Methyl Cellulose Films. Foods 2023; 12. [PMID: 36766078 DOI: 10.3390/foods12030547] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/20/2023] [Accepted: 01/23/2023] [Indexed: 01/29/2023] Open
Abstract
The good oxygen barrier and hydrophobic properties of curdlan (CL) film might be suitable complements for MC film, and its similar glucose unit and thermal-gel character might endow the methyl cellulose (MC)/CL blended system with compatibility and good comprehensive properties. Thus, MC/CL blended films were developed. The effects of MC/CL blend ratios on the microstructures and physical properties of the blends were characterized by using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), oxygen and water vapor permeability testing, dynamic mechanical analysis (DMA), light transmittance testing, tensile testing, hydrophilic property testing, and water solubility testing. The introduction of CL affected the molecular aggregation and crystallization of the MC molecules, suggesting MC-CL molecular interactions. The cross-sectional roughness of the MC/CL film increased with an increase in CL content, while the surface of the MC/CL 5:5 film was smoother than those of the MC/CL 7:3 and 3:7 films. Only one glass transition temperature, which was between that of the MC and CL films, was observed for the MC/CL 7:3 and MC/CL 5:5 films, indicating the good compatibility of the MC and CL molecules at these two blend ratios. The hydrophobicity and water insolubility increased with the CL content, which was due to the combined effects of more hydrophobic cavities in the CL triple-helix and increased surface roughness. Increased oxygen barrier properties with increasing CL content might be a combined effect of the increased hydrogen bonds and hydrophilic ektexines of the CL triple-helix. The elongations of the blended films were higher than those of the MC film, which might be related to its increased water content. The MC/CL 7:3 and MC/CL 5:5 films retained the good light transmittance and tensile strength of the MC film, which corresponded well to their good compatibility and might be due to the effects of the MC-CL molecular interactions and the relative smooth morphologies. MC/CL 5:5 showed improved water vapor barrier properties, which might be due to its smooth surface morphologies. This research offers new MC based films with improved properties and good compatibility, providing great potential for use as edible coatings, capsules, and packaging materials.
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Klimek K, Palka K, Truszkiewicz W, Douglas TEL, Nurzynska A, Ginalska G. Could Curdlan/Whey Protein Isolate/Hydroxyapatite Biomaterials Be Considered as Promising Bone Scaffolds?-Fabrication, Characterization, and Evaluation of Cytocompatibility towards Osteoblast Cells In Vitro. Cells 2022; 11:cells11203251. [PMID: 36291119 PMCID: PMC9600130 DOI: 10.3390/cells11203251] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/08/2022] [Accepted: 10/14/2022] [Indexed: 11/16/2022] Open
Abstract
The number of bone fractures and cracks requiring surgical interventions increases every year; hence, there is a huge need to develop new potential bone scaffolds for bone regeneration. The goal of this study was to gain knowledge about the basic properties of novel curdlan/whey protein isolate/hydroxyapatite biomaterials in the context of their use in bone tissue engineering. The purpose of this research was also to determine whether the concentration of whey protein isolate in scaffolds has an influence on their properties. Thus, two biomaterials differing in the concentration of whey protein isolate (i.e., 25 wt.% and 35 wt.%; hereafter called Cur_WPI25_HAp and Cur_WPI35_HAp, respectively) were fabricated and subjected to evaluation of porosity, mechanical properties, swelling ability, protein release capacity, enzymatic biodegradability, bioactivity, and cytocompatibility towards osteoblasts in vitro. It was found that both biomaterials fulfilled a number of requirements for bone scaffolds, as they demonstrated limited swelling and the ability to undergo controllable enzymatic biodegradation, to form apatite layers on their surfaces and to support the viability, growth, proliferation, and differentiation of osteoblasts. On the other hand, the biomaterials were characterized by low open porosity, which may hinder the penetration of cells though their structure. Moreover, they had low mechanical properties compared to natural bone, which limits their use to filling of bone defects in non-load bearing implantation areas, e.g., in the craniofacial area, but then they will be additionally supported by application of mechanically strong materials such as titanium plates. Thus, this preliminary in vitro research indicates that biomaterials composed of curdlan, whey protein isolate, and hydroxyapatite seem promising for bone tissue engineering applications, but their porosity and mechanical properties should be improved. This will be the subject of our further work.
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Affiliation(s)
- Katarzyna Klimek
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland
- Correspondence: ; Tel.: +48-448-70-28
| | - Krzysztof Palka
- Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 26 Street, 20-618 Lublin, Poland
| | - Wieslaw Truszkiewicz
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland
| | - Timothy E. L. Douglas
- School of Engineering, Lancaster University, Gillow Avenue, Lancaster LA1 4YW, UK
- Materials Science Institute (MSI), Lancaster University, Lancaster LA1 4YW, UK
| | - Aleksandra Nurzynska
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland
| | - Grazyna Ginalska
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland
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11
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Negi S, Pahari S, Das DK, Khan N, Agrewala JN. Corrigendum: Curdlan Limits Mycobacterium tuberculosis Survival Through STAT-1 Regulated Nitric Oxide Production. Front Microbiol 2022; 13:924981. [PMID: 35663892 PMCID: PMC9159356 DOI: 10.3389/fmicb.2022.924981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 05/03/2022] [Indexed: 11/15/2022] Open
Affiliation(s)
- Shikha Negi
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India
| | - Susanta Pahari
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India.,Immunology Division, Texas Biomedical Research Institute, San Antonio, TX, United States
| | - Deepjyoti Kumar Das
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India
| | - Nargis Khan
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India.,Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
| | - Javed N Agrewala
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India.,Department of Biomedical Engineering, Indian Institute of Technology Ropar, Rupnagar, India
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Oliveira-Brito PKM, de Campos GY, Guimarães JG, Serafim da Costa L, Silva de Moura E, Lazo-Chica JE, Roque-Barreira MC, da Silva TA. Adjuvant Curdlan Contributes to Immunization against Cryptococcus gattii Infection in a Mouse Strain-Specific Manner. Vaccines (Basel) 2022; 10:vaccines10040620. [PMID: 35455369 PMCID: PMC9030172 DOI: 10.3390/vaccines10040620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/05/2022] [Accepted: 04/07/2022] [Indexed: 02/06/2023] Open
Abstract
The low efficacy and side effects associated with antifungal agents have highlighted the importance of developing immunotherapeutic approaches to treat Cryptococcus gattii infection. We developed an immunization strategy that uses selective Dectin-1 agonist as an adjuvant. BALB/c or C57BL/6 mice received curdlan or β-glucan peptide (BGP) before immunization with heat-killed C. gattii, and the mice were infected with viable C. gattii on day 14 post immunization and euthanized 14 days after infection. Adjuvant curdlan restored pulmonary tumor necrosis factor- α (TNF-α) levels, as induced by immunization with heat-killed C. gattii. The average area and relative frequency of C. gattii titan cells in the lungs of curdlan-treated BALB/c mice were reduced. However, this did not reduce the pulmonary fungal burden or decrease the i0,nflammatory infiltrate in the pulmonary parenchyma of BALB/c mice. Conversely, adjuvant curdlan induced high levels of interferon-γ (IFN-γ) and interleukin (IL)-10 and decreased the C. gattii burden in the lungs of C57BL/6 mice, which was not replicated in β-glucan peptide-treated mice. The adjuvant curdlan favors the control of C. gattii infection depending on the immune response profile of the mouse strain. This study will have implications for developing new immunotherapeutic approaches to treat C. gattii infection.
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Affiliation(s)
- Patrícia Kellen Martins Oliveira-Brito
- Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14049-900, SP, Brazil; (P.K.M.O.-B.); (G.Y.d.C.); (J.G.G.); (E.S.d.M.); (M.C.R.-B.)
| | - Gabriela Yamazaki de Campos
- Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14049-900, SP, Brazil; (P.K.M.O.-B.); (G.Y.d.C.); (J.G.G.); (E.S.d.M.); (M.C.R.-B.)
| | - Júlia Garcia Guimarães
- Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14049-900, SP, Brazil; (P.K.M.O.-B.); (G.Y.d.C.); (J.G.G.); (E.S.d.M.); (M.C.R.-B.)
| | - Letícia Serafim da Costa
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 14049-900, SP, Brazil;
| | - Edanielle Silva de Moura
- Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14049-900, SP, Brazil; (P.K.M.O.-B.); (G.Y.d.C.); (J.G.G.); (E.S.d.M.); (M.C.R.-B.)
| | - Javier Emílio Lazo-Chica
- Institute of Natural and Biological Sciences, Federal University of Triângulo Mineiro, Uberaba 38025-189, MG, Brazil;
| | - Maria Cristina Roque-Barreira
- Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14049-900, SP, Brazil; (P.K.M.O.-B.); (G.Y.d.C.); (J.G.G.); (E.S.d.M.); (M.C.R.-B.)
| | - Thiago Aparecido da Silva
- Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto 14049-900, SP, Brazil; (P.K.M.O.-B.); (G.Y.d.C.); (J.G.G.); (E.S.d.M.); (M.C.R.-B.)
- Thiago Aparecido da Silva, Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto 14049-900, SP, Brazil
- Correspondence: or ; Tel.: +55-16-3315-3049
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Klimek K, Tarczynska M, Truszkiewicz W, Gaweda K, Douglas TEL, Ginalska G. Freeze-Dried Curdlan/Whey Protein Isolate-Based Biomaterial as Promising Scaffold for Matrix-Associated Autologous Chondrocyte Transplantation-A Pilot In-Vitro Study. Cells 2022; 11:282. [PMID: 35053397 PMCID: PMC8773726 DOI: 10.3390/cells11020282] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 11/18/2021] [Revised: 01/09/2022] [Accepted: 01/12/2022] [Indexed: 01/18/2023] Open
Abstract
The purpose of this pilot study was to establish whether a novel freeze-dried curdlan/whey protein isolate-based biomaterial may be taken into consideration as a potential scaffold for matrix-associated autologous chondrocyte transplantation. For this reason, this biomaterial was initially characterized by the visualization of its micro- and macrostructures as well as evaluation of its mechanical stability, and its ability to undergo enzymatic degradation in vitro. Subsequently, the cytocompatibility of the biomaterial towards human chondrocytes (isolated from an orthopaedic patient) was assessed. It was demonstrated that the novel freeze-dried curdlan/whey protein isolate-based biomaterial possessed a porous structure and a Young's modulus close to those of the superficial and middle zones of cartilage. It also exhibited controllable degradability in collagenase II solution over nine weeks. Most importantly, this biomaterial supported the viability and proliferation of human chondrocytes, which maintained their characteristic phenotype. Moreover, quantitative reverse transcription PCR analysis and confocal microscope observations revealed that the biomaterial may protect chondrocytes from dedifferentiation towards fibroblast-like cells during 12-day culture. Thus, in conclusion, this pilot study demonstrated that novel freeze-dried curdlan/whey protein isolate-based biomaterial may be considered as a potential scaffold for matrix-associated autologous chondrocyte transplantation.
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Affiliation(s)
- Katarzyna Klimek
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland; (W.T.); (G.G.)
| | - Marta Tarczynska
- Department and Clinic of Orthopaedics and Traumatology, Medical University of Lublin, Jaczewskiego 8 Street, 20-090 Lublin, Poland; (M.T.); (K.G.)
| | - Wieslaw Truszkiewicz
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland; (W.T.); (G.G.)
| | - Krzysztof Gaweda
- Department and Clinic of Orthopaedics and Traumatology, Medical University of Lublin, Jaczewskiego 8 Street, 20-090 Lublin, Poland; (M.T.); (K.G.)
| | - Timothy E. L. Douglas
- Engineering Department, Lancaster University, Gillow Avenue, Lancaster LA 1 4YW, UK;
- Materials Science Institute (MSI), Lancaster University, Lancaster LA 1 4YW, UK
| | - Grazyna Ginalska
- Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland; (W.T.); (G.G.)
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Chaffey A, Hamonic G, Chand D, Mutwiri GK, Wilson HL. The Adjuvants Polyphosphazene (PCEP) and a Combination of Curdlan Plus Leptin Promote a Th17-Type Immune Response to an Intramuscular Vaccine in Mice. Vaccines (Basel) 2021; 9:507. [PMID: 34069081 DOI: 10.3390/vaccines9050507] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 05/06/2021] [Accepted: 05/07/2021] [Indexed: 12/25/2022] Open
Abstract
Our aim was to determine whether polyphosphazene (PCEP), Curdlan (β-glucan, a dectin-1 agonist), and Leptin could act as adjuvants to promote a Th17-type adaptive immune response in mice. Mice were vaccinated via the intramuscular route then boosted three weeks later with Ovalbumin plus: PCEP, Leptin, Curdlan, PCEP+Curdlan, Curdlan+Leptin, or saline. Mice vaccinated with OVA+PCEP and OVA+Curdlan+Leptin showed significantly higher frequency of antigen-specific CD4+ T cells secreting IL-17 relative to OVA-vaccinated mice. No formulation increased the frequency of CD4+ T cells secreting IL-4 or IFNγ. Since activation of innate immunity precedes the development of adaptive immunity, we wished to establish whether induction of Th17-type immunity could be predicted from in vitro experiments and/or from the local cytokine environment after immunization with adjuvants alone. Elevated IL-6 and TGFβ with reduced secretion of IL-12 is a cytokine milieu known to promote differentiation of Th17-type immunity. We injected the immunostimulants or saline buffer into murine thigh muscles and measured acute local cytokine production. PCEP induced significant production of IL-6 and reduced IL-12 production in muscle but it did not lead to elevated TGFβ production. Curdlan+Leptin injected into muscle induced significant production of TGFβ and IL-17 but not IL-6 or IL-12. We also stimulated splenocytes with media or PCEP, Leptin, Curdlan, PCEP+Curdlan, Curdlan+Leptin, PCEP+Leptin, and PCEP+Curdlan+Leptin and measured cytokine production. PCEP stimulation of splenocytes failed to induce significant production of IL-6, IL-12, TGFβ, or IL-17 and therefore ex vivo splenocyte stimulation failed to predict the increased frequency of Th17-type T cells in response to the vaccine. Curdlan-stimulated splenocytes produced Th1-type, inducing cytokine, IL-12. Curdlan+/-PCEP stimulated TGF-β production and Curdlan+Leptin+/- PCEP induced secretion of IL-17. We conclude that PCEP as well as Curdlan+Leptin are Th17-type vaccine adjuvants in mice but that cytokines produced in response to these adjuvants in muscle after injection or in ex vivo cultured splenocytes did not predict their role as a Th17-type adjuvant. Together, these data suggest that the cytokine environments induced by these immunostimulants did not predict induction of an antigen-specific Th17-type adaptive immune response. This is the first report of these adjuvants inducing a Th17-type adaptive immune response.
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Rahman S, Davids M, van Hamersveld PHP, Welting O, Rahaoui H, Schuren F, Meijer SL, van den Wijngaard RM, Hakvoort TBM, de Jonge WJ, Heinsbroek SEM. Dietary Curdlan Enhances Bifidobacteria and Reduces Intestinal Inflammation in Mice. Nutrients 2021; 13:1305. [PMID: 33920960 PMCID: PMC8071228 DOI: 10.3390/nu13041305] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 04/12/2021] [Indexed: 12/12/2022] Open
Abstract
β-glucan consumption is known for its beneficial health effects, but the mode of action is unclear. While humans and mice lack the required enzymes to digest β-glucans, certain intestinal microbes can digest β-glucans, triggering gut microbial changes. Curdlan, a particulate β-glucan isolated from Alcaligenes faecalis, is used as a food additive. In this study we determined the effect of curdlan intake in mice on the intestinal microbiota and dextran sodium sulfate (DSS)-induced intestinal inflammation. The effect of curdlan on the human intestinal microbiota was assessed using i-screen, an assay for studying anaerobic microbial interactions. Mice received oral gavage with vehicle or curdlan for 14 days followed by DSS for 7 days. The curdlan-fed group showed reduced weight loss and colonic inflammation compared to the vehicle-fed group. Curdlan intake did not induce general microbiota community changes, although a specific Bifidobacterium, closely related to Bifidobacterium choerinum, was observed to be 10- to 100-fold more prevalent in the curdlan-fed group under control and colitis conditions, respectively. When tested in i-screen, curdlan induced a global change in the microbial composition of the healthy intestinal microbiota from a human. Overall, these results suggest that dietary curdlan induces microbiota changes that could reduce intestinal inflammation.
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Affiliation(s)
- Shafaque Rahman
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 BK Amsterdam, The Netherlands; (S.R.); (P.H.P.v.H.); (O.W.); (R.M.v.d.W.); (T.B.M.H.); (W.J.d.J.)
| | - Mark Davids
- Department of Vascular Medicine, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Patricia H. P. van Hamersveld
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 BK Amsterdam, The Netherlands; (S.R.); (P.H.P.v.H.); (O.W.); (R.M.v.d.W.); (T.B.M.H.); (W.J.d.J.)
| | - Olaf Welting
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 BK Amsterdam, The Netherlands; (S.R.); (P.H.P.v.H.); (O.W.); (R.M.v.d.W.); (T.B.M.H.); (W.J.d.J.)
| | - Hakim Rahaoui
- The Netherlands Organization for Applied Scientific Research (TNO), 3704 HE Zeist, The Netherlands; (H.R.); (F.S.)
| | - Frank Schuren
- The Netherlands Organization for Applied Scientific Research (TNO), 3704 HE Zeist, The Netherlands; (H.R.); (F.S.)
| | - Sybren L. Meijer
- Department of Pathology, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - René M. van den Wijngaard
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 BK Amsterdam, The Netherlands; (S.R.); (P.H.P.v.H.); (O.W.); (R.M.v.d.W.); (T.B.M.H.); (W.J.d.J.)
| | - Theodorus B. M. Hakvoort
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 BK Amsterdam, The Netherlands; (S.R.); (P.H.P.v.H.); (O.W.); (R.M.v.d.W.); (T.B.M.H.); (W.J.d.J.)
| | - Wouter J. de Jonge
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 BK Amsterdam, The Netherlands; (S.R.); (P.H.P.v.H.); (O.W.); (R.M.v.d.W.); (T.B.M.H.); (W.J.d.J.)
- Department of Surgery, University of Bonn, 53113 Bonn, Germany
| | - Sigrid E. M. Heinsbroek
- Tytgat Institute for Liver and Intestinal Research, Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, 1105 BK Amsterdam, The Netherlands; (S.R.); (P.H.P.v.H.); (O.W.); (R.M.v.d.W.); (T.B.M.H.); (W.J.d.J.)
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16
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Hermans L, De Pelsmaeker S, Denaeghel S, Cox E, Favoreel HW, Devriendt B. β-Glucan-Induced IL-10 Secretion by Monocytes Triggers Porcine NK Cell Cytotoxicity. Front Immunol 2021; 12:634402. [PMID: 33679785 PMCID: PMC7933222 DOI: 10.3389/fimmu.2021.634402] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 02/02/2021] [Indexed: 01/19/2023] Open
Abstract
Beta-glucans are naturally occurring polysaccharides present in cell walls of fungi, yeast, bacteria, cereals, seaweed, and algae. These microbe-associated molecular patterns (MAMPs) possess immunomodulatory properties. In human, it has been suggested that NK cells can be activated by β-glucans. Here, we aimed to elucidate whether β-glucans modulate porcine NK cell responses in vitro and if so, how these effects are mediated. We investigated the effect of two β-glucans, Macrogard and Curdlan, which differ in solubility and structure. Direct addition of β-glucans to purified porcine NK cells did not affect cytotoxicity of these cells against K562 target cells. However, when using PBMC instead of purified NK cells, β-glucan addition significantly increased NK cell-mediated cytotoxicity. This effect depended on factors secreted by CD14+ monocytes upon β-glucan priming. Further analysis showed that monocytes secrete TNF-α, IL-6, and IL-10 upon β-glucan addition. Of these, IL-10 turned out to play a critical role in β-glucan-triggered NK cell cytotoxicity, since depletion of IL-10 completely abrogated the β-glucan-induced increase in cytotoxicity. Furthermore, addition of recombinant IL-10 to purified NK cells was sufficient to enhance cytotoxicity. In conclusion, we show that β-glucans trigger IL-10 secretion by porcine monocytes, which in turn leads to increased NK cell cytotoxicity, and thereby identify IL-10 as a potent stimulus of porcine NK cell cytotoxicity.
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Affiliation(s)
- Leen Hermans
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Steffi De Pelsmaeker
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Sofie Denaeghel
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Eric Cox
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Herman W Favoreel
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Bert Devriendt
- Laboratory of Immunology, Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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Toullec C, Le Bideau J, Geoffroy V, Halgand B, Buchtova N, Molina-Peña R, Garcion E, Avril S, Sindji L, Dube A, Boury F, Jérôme C. Curdlan-Chitosan Electrospun Fibers as Potential Scaffolds for Bone Regeneration. Polymers (Basel) 2021; 13:polym13040526. [PMID: 33578913 PMCID: PMC7916722 DOI: 10.3390/polym13040526] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/05/2021] [Accepted: 02/05/2021] [Indexed: 01/16/2023] Open
Abstract
Polysaccharides have received a lot of attention in biomedical research for their high potential as scaffolds owing to their unique biological properties. Fibrillar scaffolds made of chitosan demonstrated high promise in tissue engineering, especially for skin. As far as bone regeneration is concerned, curdlan (1,3-β-glucan) is particularly interesting as it enhances bone growth by helping mesenchymal stem cell adhesion, by favoring their differentiation into osteoblasts and by limiting the osteoclastic activity. Therefore, we aim to combine both chitosan and curdlan polysaccharides in a new scaffold for bone regeneration. For that purpose, curdlan was electrospun as a blend with chitosan into a fibrillar scaffold. We show that this novel scaffold is biodegradable (8% at two weeks), exhibits a good swelling behavior (350%) and is non-cytotoxic in vitro. In addition, the benefit of incorporating curdlan in the scaffold was demonstrated in a scratch assay that evidences the ability of curdlan to express its immunomodulatory properties by enhancing cell migration. Thus, these innovative electrospun curdlan–chitosan scaffolds show great potential for bone tissue engineering.
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Affiliation(s)
- Clément Toullec
- CRCINA, SFR ICAT, University Angers, Université de Nantes, Inserm, F-49000 Angers, France; (C.T.); (N.B.); (R.M.-P.); (E.G.); (S.A.); (L.S.)
- Center for Education and Research on Macromolecules (CERM), CESAM-UR, University of Liège, B-4000 Liège, Belgium
| | - Jean Le Bideau
- Université de Nantes, CNRS, Institut des Matériaux Jean Rouxel, IMN, F-44000 Nantes, France;
| | - Valerie Geoffroy
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Université de Nantes, F-44042 Nantes, France; (V.G.); (B.H.)
- UFR Odontologie, Université de Nantes, F-44042 Nantes, France
| | - Boris Halgand
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, ONIRIS, Université de Nantes, F-44042 Nantes, France; (V.G.); (B.H.)
- UFR Odontologie, Université de Nantes, F-44042 Nantes, France
- CHU Nantes, PHU4 OTONN, F-44093 Nantes, France
| | - Nela Buchtova
- CRCINA, SFR ICAT, University Angers, Université de Nantes, Inserm, F-49000 Angers, France; (C.T.); (N.B.); (R.M.-P.); (E.G.); (S.A.); (L.S.)
| | - Rodolfo Molina-Peña
- CRCINA, SFR ICAT, University Angers, Université de Nantes, Inserm, F-49000 Angers, France; (C.T.); (N.B.); (R.M.-P.); (E.G.); (S.A.); (L.S.)
| | - Emmanuel Garcion
- CRCINA, SFR ICAT, University Angers, Université de Nantes, Inserm, F-49000 Angers, France; (C.T.); (N.B.); (R.M.-P.); (E.G.); (S.A.); (L.S.)
| | - Sylvie Avril
- CRCINA, SFR ICAT, University Angers, Université de Nantes, Inserm, F-49000 Angers, France; (C.T.); (N.B.); (R.M.-P.); (E.G.); (S.A.); (L.S.)
| | - Laurence Sindji
- CRCINA, SFR ICAT, University Angers, Université de Nantes, Inserm, F-49000 Angers, France; (C.T.); (N.B.); (R.M.-P.); (E.G.); (S.A.); (L.S.)
| | - Admire Dube
- School of Pharmacy, University of the Western Cape, Bellville 7535, South Africa;
| | - Frank Boury
- CRCINA, SFR ICAT, University Angers, Université de Nantes, Inserm, F-49000 Angers, France; (C.T.); (N.B.); (R.M.-P.); (E.G.); (S.A.); (L.S.)
- Correspondence: (F.B.); (C.J.)
| | - Christine Jérôme
- Center for Education and Research on Macromolecules (CERM), CESAM-UR, University of Liège, B-4000 Liège, Belgium
- Correspondence: (F.B.); (C.J.)
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Zhang L, Yue LN, Qian JY, Ding XL. Effect of Curdlan on the Rheological Properties of Hydroxypropyl Methylcellulose. Foods 2020; 10:E34. [PMID: 33374366 DOI: 10.3390/foods10010034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/21/2020] [Accepted: 12/21/2020] [Indexed: 11/17/2022] Open
Abstract
This work focuses on the effect of curdlan (CL) on dynamic viscoelastic property, thermal reversible property, viscosity, and the fluid types of hydroxypropyl methylcellulose (HPMC) at different temperatures. Compared to the blends at 25 °C, the blends had a smaller linear viscoelastic region (LVR), a higher gel strength, and larger storage modulus (G') and loss modulus (G") values at 82 °C. G', G", gel strength, and viscosity increased with the increase of CL. Repeated temperature sweep led to increased G' and G" of HPMC/CL blends. For HC6 and HC8, the gel formation temperature of the repeated temperature sweep was significantly lower than that of the first sweep. The samples at 82 °C, except for the sample with 8% CL, were all yield-shear thinning fluids, and the samples at 40 °C were shear thinning fluids. The creation of HPMC/CL and its rheological research might provide some methodological references for the study of other thermal-thermal gel blends.
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Lachowicz D, Kaczyńska A, Bodzon-Kulakowska A, Karewicz A, Wirecka R, Szuwarzyński M, Zapotoczny S. Coacervate Thermoresponsive Polysaccharide Nanoparticles as Delivery System for Piroxicam. Int J Mol Sci 2020; 21:E9664. [PMID: 33352956 DOI: 10.3390/ijms21249664] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 11/30/2022] Open
Abstract
Low water solubility frequently compromises the therapeutic efficacy of drugs and other biologically active molecules. Here, we report on coacervate polysaccharide nanoparticles (CPNs) that can transport and release a model hydrophobic drug, piroxicam, to the cells in response to changes in temperature. The proposed, temperature-responsive drug delivery system is based on ionic derivatives of natural polysaccharides—curdlan and hydroxypropyl cellulose. Curdlan was modified with trimethylammonium groups, while the anionic derivative of hydroxypropyl cellulose was obtained by the introduction of styrenesulfonate groups. Thermally responsive nanoparticles of spherical shape and average hydrodynamic diameter in the range of 250–300 nm were spontaneously formed in water from the obtained ionic polysaccharides as a result of the coacervation process. Their morphology was visualized using SEM and AFM. The size and the surface charge of the obtained objects could be tailored by adjusting the polycation/polyanion ratio. Piroxicam (PIX) was effectively entrapped inside the nanoparticles. The release profile of the drug from the CPNs-PIX was found to be temperature-dependent in the range relevant for biomedical applications.
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20
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Heo J, Sobiech TA, Kutscher HL, Chaves L, Sukumaran DK, Karki S, Dube A, Prasad PN, Reynolds JL. Hybrid Curdlan Poly(γ -Glutamic Acid) Nanoassembly for Immune Modulation in Macrophage. Macromol Biosci 2020; 21:e2000358. [PMID: 33283480 DOI: 10.1002/mabi.202000358] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/12/2020] [Indexed: 11/06/2022]
Abstract
A nanoformulation composed of curdlan, a linear polysaccharide of 1,3-β-linked d-glucose units, hydrogen bonded to poly(γ -glutamic acid) (PGA), was developed to stimulate macrophage. Curdlan/PGA nanoparticles (C-NP) are formulated by physically blending curdlan (0.2 mg mL-1 in 0.4 m NaOH) with PGA (0.8 mg mL-1 ). Forster resonance energy transfer (FRET) analysis demonstrates a heterospecies interpolymer complex formed between curdlan and PGA. The 1 H-NMR spectra display significant peak broadening as well as downfield chemical shifts of the hydroxyl proton resonances of curdlan, indicating potential intermolecular hydrogen bonding interactions. In addition, the cross peaks in 1 H-1 H 2D-NOESY suggest intermolecular associations between the OH-2/OH-4 hydroxyl groups of curdlan and the carboxylic-/amide-groups of PGA via hydrogen bonding. Intracellular uptake of C-NP occurs over time in human monocyte-derived macrophage (MDM). Furthermore, C-NP nanoparticles dose-dependently increase gene expression for TNF-α, IL-6, and IL-8 at 24 h in MDM. C-NP nanoparticles also stimulate the release of IL-lβ, MCP-1, TNF-α, IL-8, IL-12p70, IL-17, IL-18, and IL-23 from MDM. Overall, this is the first demonstration of a simplistic nanoformulation formed by hydrogen bonding between curdlan and PGA that modulates cytokine gene expression and release of cytokines from MDM.
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Affiliation(s)
- Jeongyun Heo
- Institute for Laser, Photonics and Biophotonics, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA.,Division of Allergy, Immunology, and Rheumatology, Department of Medicine, Clinical Translational Research Center, The State University of New York at Buffalo, Buffalo, NY, 14203, USA
| | - Thomas A Sobiech
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Hilliard L Kutscher
- Institute for Laser, Photonics and Biophotonics, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA.,Division of Allergy, Immunology, and Rheumatology, Department of Medicine, Clinical Translational Research Center, The State University of New York at Buffalo, Buffalo, NY, 14203, USA.,Department of Anesthesiology, The State University of New York at Buffalo, Buffalo, NY, 14203, USA
| | - Lee Chaves
- Division of Nephrology, Department of Medicine, Clinical Translational Research Center, The State University of New York at Buffalo, Buffalo, NY, 14203, USA
| | - Dinesh K Sukumaran
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Shanta Karki
- Division of Allergy, Immunology, and Rheumatology, Department of Medicine, Clinical Translational Research Center, The State University of New York at Buffalo, Buffalo, NY, 14203, USA
| | - Admire Dube
- School of Pharmacy, University of the Western Cape, Bellville, Cape Town, 7535, South Africa
| | - Paras N Prasad
- Institute for Laser, Photonics and Biophotonics, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA.,Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Jessica L Reynolds
- Division of Allergy, Immunology, and Rheumatology, Department of Medicine, Clinical Translational Research Center, The State University of New York at Buffalo, Buffalo, NY, 14203, USA
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21
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Han L, Zhu J, Fan X, Zhang C, Tu K, Peng J, Wang J, Pan L. Rapid Non-Destructive Quantification of Eugenol in Curdlan Biofilms by Electronic Nose Combined with Gas Chromatography-Mass Spectrometry. Sensors (Basel) 2020; 20:E4441. [PMID: 32784818 DOI: 10.3390/s20164441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/20/2020] [Accepted: 08/06/2020] [Indexed: 02/02/2023]
Abstract
Eugenol is hepatotoxic and potentially hazardous to human health. This paper reports on a rapid non-destructive quantitative method for the determination of eugenol concentration in curdlan (CD) biofilms by electronic nose (E-nose) combined with gas chromatography-mass spectrometry (GC-MS). Different concentrations of eugenol were added to the film-forming solution to form a series of biofilms by casting method, and the actual eugenol concentration in the biofilm was determined. Analysis of the odor collected on the biofilms was carried out by GC-MS and an E-nose. The E-nose data was subjected to principal component analysis (PCA) and linear discriminant analysis (LDA) in order to establish a discriminant model for determining eugenol concentrations in the biofilms. Further analyses involving the application of all sensors and featured sensors, the prediction model-based partial least squares (PLS) and support vector machines (SVM) were carried out to determine eugenol concentration in the CD biofilms. The results showed that the optimal prediction model for eugenol concentration was obtained by PLS at R2p of 0.952 using 10 sensors. The study described a rapid, non-destructive detection and quantitative method for determining eugenol concentration in bio-based packaging materials.
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22
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Wan J, Wang Y, Jiang D, Gao H, Yang G, Yang X. Effects of carbon sources on production and properties of curdlan using Agrobaterium sp. DH-2. Prep Biochem Biotechnol 2020; 50:857-864. [PMID: 32538270 DOI: 10.1080/10826068.2020.1777423] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Curdlan has wide potential application in the food and biomedical fields due to its unique thermal gel and biological activity. This study investigated the effect of six sugars including glucose, fructose, lactose, maltose, sucrose and xylose as carbon sources on production and properties of curdlan using Agrobacterium sp. DH-2. The maximum production (38.1 g/L and 37.4 g/L, respectively) and yield (0.58 g curdlan/g sucrose and 0.53 g curdlan/g maltose, respectively) of curdlan were achieved by sucrose and maltose, followed by glucose, fructose, lactose and xylose. Scanning electron micrographs showed that the surface of cells was smooth in strain growth phase, while cells were covered by curdlan matrix acted as a net in the curdlan synthesis phase. The highest glucosyltransferase activity (19.9 U/g biomass) corresponded to the maximum curdlan production using the sucrose medium. The molecular weight and gel strength of curdlan were influenced by the carbon sources. The curdlan from xylose medium resulted in a maximum molecular weight of 1.59 × 106 Da and the highest gel strength of 989.2 g/cm2, while the curdlan from sucrose medium resulted in a lowest molecular weight of 1.10 × 106 Da and gel strength of 672.8 g/cm2. The high molecular weight of curdlan had high gel strength.
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Affiliation(s)
- Jie Wan
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Yifeng Wang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Deming Jiang
- School of Life Sciences, East China Normal University, Shanghai, China
| | - Hongliang Gao
- School of Life Sciences, East China Normal University, Shanghai, China
| | - Guang Yang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Xuexia Yang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
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23
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Yang X, Zheng M, Hao S, Shi H, Lin D, Chen X, Becvarovski A, Pan W, Zhang P, Hu M, Huang XF, Zheng K, Yu Y. Curdlan Prevents the Cognitive Deficits Induced by a High-Fat Diet in Mice via the Gut-Brain Axis. Front Neurosci 2020; 14:384. [PMID: 32477045 PMCID: PMC7239995 DOI: 10.3389/fnins.2020.00384] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 03/30/2020] [Indexed: 12/20/2022] Open
Abstract
A high-fat (HF) diet is a major predisposing factor of neuroinflammation and cognitive deficits. Recently, changes in the gut microbiota have been associated with neuroinflammation and cognitive impairment, through the gut-brain axis. Curdlan, a bacterial polysaccharide widely used as food additive, has the potential to alter the composition of the microbiota and improve the gut-brain axis. However, the effects of curdlan against HF diet-induced neuroinflammation and cognitive decline have not been investigated. We aimed to evaluate the neuroprotective effect and mechanism of dietary curdlan supplementation against the obesity-associated cognitive decline observed in mice fed a HF diet. C57Bl/6J male mice were fed with either a control, HF, or HF with curdlan supplementation diets for 7 days (acute) or 15 weeks (chronic). We found that acute curdlan supplementation prevented the gut microbial composition shift induced by HF diet. Chronic curdlan supplementation prevented cognitive declines induced by HF diet. In addition, curdlan protected against the HF diet-induced abnormities in colonic permeability, hyperendotoxemia, and colonic inflammation. Furthermore, in the prefrontal cortex (PFC) and hippocampus, curdlan mitigated microgliosis, neuroinflammation, and synaptic impairments induced by a HF diet. Thus, curdlan—as a food additive and prebiotic—can prevent cognitive deficits induced by HF diet via the colon-brain axis.
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Affiliation(s)
- Xiaoying Yang
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Mingxuan Zheng
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Shanshan Hao
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Hongli Shi
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Danhong Lin
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Xi Chen
- Illawarra Health and Medical Research Institute (IHMRI), School of Medicine, University of Wollongong, Wollongong, NSW, Australia
| | - Alec Becvarovski
- Illawarra Health and Medical Research Institute (IHMRI), School of Medicine, University of Wollongong, Wollongong, NSW, Australia
| | - Wei Pan
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Peng Zhang
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Minmin Hu
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Xu-Feng Huang
- Illawarra Health and Medical Research Institute (IHMRI), School of Medicine, University of Wollongong, Wollongong, NSW, Australia
| | - Kuiyang Zheng
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Yinghua Yu
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology, Xuzhou Medical University, Xuzhou, China
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24
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Qi X, Zhang M, Su T, Pan W, Tong X, Zeng Q, Xiong W, Jiang N, Qian Y, Li Z, He X, Shen L, Zhou Z, Shen J. Biocompatible Hydrogels Based on Food Gums with Tunable Physicochemical Properties as Scaffolds for Cell Culture. J Agric Food Chem 2020; 68:3770-3778. [PMID: 32084311 DOI: 10.1021/acs.jafc.9b06120] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [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
Hydrogels composed of food gums have gained attention for future biomedical applications, such as targeted delivery and tissue engineering. For their translation to clinical utilization, reliable biocompatibility, sufficient mechanical performance, and tunable structure of polysaccharide hydrogels are required aspects. In this work, we report a unique hybrid polysaccharide hydrogel composed of salecan and curdlan, in which the former is a thickening agent and the latter serves as a network matrix. The physicochemical properties, such as mechanical strength, thermal stability, swelling, and morphology, of the developed composite hydrogel can be accurately modulated by varying the polysaccharide content. Importantly, cytotoxicity assays show the non-toxicity of this hybrid hydrogel. Furthermore, this hydrogel system can support cell proliferation, migration, and function. Altogether, our work proposes a new strategy to build a polysaccharide-constructed hydrogel scaffold, which holds much promise for tissue engineering in terms of cell engraftment, survival, proliferation, and function.
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Affiliation(s)
- Xiaoliang Qi
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Mengying Zhang
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Ting Su
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Wenhao Pan
- Department of Orthodontics, School & Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Xianqin Tong
- Department of Orthodontics, School & Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Qiankun Zeng
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Wei Xiong
- Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Ning Jiang
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Yuna Qian
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Zhipeng Li
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Xiaojun He
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Liangliang Shen
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Zaigang Zhou
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Jianliang Shen
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
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25
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Ye W, Yan B, Pang J, Fan D, Huang J, Zhou W, Cheng X, Chen H, Zhang H. A Study of the Synergistic Interaction of Konjac Glucomannan/ Curdlan Blend Systems under Alkaline Conditions. Materials (Basel) 2019; 12:ma12213543. [PMID: 31671796 PMCID: PMC6862313 DOI: 10.3390/ma12213543] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/21/2019] [Accepted: 10/25/2019] [Indexed: 11/16/2022]
Abstract
To improve the gelation performance of konjac glucomannan (KGM) thermo-irreversible gel in the condition of alkaline, this study investigated the interactions between KGM and curdlan (CUD) in terms of the sol state and gelation process. The apparent viscosity, rheological properties during heating and cooling, thermodynamic properties, gelation properties and water holding capacity of KGM/CUD blend systems in an alkaline environment were studied using physical property testing instruments and methods. The results showed that the viscosity of the KGM/CUD blended solution was greater than the value calculated from the ideal mixing rules in the condition of alkaline (pH = 10.58). As the proportion of CUD in the system increased, the intersection of storage modulus (G') and loss modulus (G") shifted to low frequencies, the relaxation time gradually increased, and the degree of entanglement of molecular chains between these two components gradually increased. The addition of CUD helped decrease the gelation temperature of KGM, increased the gelation rate and inhibited the thinning phenomenon of KGM gels at low temperatures (2-20 °C). The addition of CUD increased the hardness and gel strength of KGM but did not significantly improve the water holding capacity of the KGM/CUD blend gel. The process of mixing KGM and CUD improved the thermal stability of the gel. In summary, KGM/CUD exhibited excellent compatibility under alkaline conditions, and the blend systems produced a "viscosifying effect". KC8 and KC5 show better thermal stability, low temperature resistance and gel strength compared to KGM. This blended gel can be used as a structural support material to provide reference for the development of konjac bionic vegetarian products.
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Affiliation(s)
- Weijian Ye
- Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing, Ministry of Agriculture and Rural Affairs, Xiamen 361022, China.
| | - Bowen Yan
- Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing, Ministry of Agriculture and Rural Affairs, Xiamen 361022, China.
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Jie Pang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Daming Fan
- Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing, Ministry of Agriculture and Rural Affairs, Xiamen 361022, China.
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Jianlian Huang
- Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing, Ministry of Agriculture and Rural Affairs, Xiamen 361022, China.
- Fujian Anjoy food Share Co. Ltd., Xiamen 361022, China.
| | - Wenguo Zhou
- Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing, Ministry of Agriculture and Rural Affairs, Xiamen 361022, China.
- Fujian Anjoy food Share Co. Ltd., Xiamen 361022, China.
| | - Xueqian Cheng
- Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing, Ministry of Agriculture and Rural Affairs, Xiamen 361022, China.
- Fujian Anjoy food Share Co. Ltd., Xiamen 361022, China.
| | - Hui Chen
- Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing, Ministry of Agriculture and Rural Affairs, Xiamen 361022, China.
- Fujian Anjoy food Share Co. Ltd., Xiamen 361022, China.
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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26
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Li Q, Wang P, Miao S, Zhang L, Zheng B. Curdlan enhances the structure of myosin gel model. Food Sci Nutr 2019; 7:2123-2130. [PMID: 31289660 PMCID: PMC6593382 DOI: 10.1002/fsn3.1055] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 03/15/2019] [Accepted: 03/17/2019] [Indexed: 11/15/2022] Open
Abstract
The aim of this work was to investigate the gelation mechanism of curdlan on surimi using a myosin gel model. Experimental results showed that with increased levels of curdlan, the water-holding capacity, gel strength, and storage modulus of a myosin gel first increased and then decreased. The optimum level of curdlan was found to be 1%. Moreover, myosin-curdlan mixed gel showed decreased water liquidity based on the results of low-field nuclear magnetic resonance. The enhanced physicochemical properties of myosin-curdlan mixed gel were attributed to the strengthened hydrogen bonding and to the uniform and compact network structure shown by Fourier-transform infrared spectroscopy and scanning electron microscopy. The results of this study suggest that curdlan has the potential to be used in surimi-based seafood products to enhance the gel structure.
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Affiliation(s)
- Qianru Li
- College of Food ScienceFujian Agriculture and Forestry UniversityFuzhouChina
- China‐Ireland International Cooperation Centre for Food Material Science and Structural DesignFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special StarchFujian Agriculture and Forestry UniversityFuzhouChina
| | - Peisen Wang
- College of Food ScienceFujian Agriculture and Forestry UniversityFuzhouChina
- China‐Ireland International Cooperation Centre for Food Material Science and Structural DesignFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special StarchFujian Agriculture and Forestry UniversityFuzhouChina
| | - Song Miao
- China‐Ireland International Cooperation Centre for Food Material Science and Structural DesignFujian Agriculture and Forestry UniversityFuzhouChina
- Teagasc Food Research CentreMoorepark, Fermoy, Co.CorkIreland
| | - Longtao Zhang
- College of Food ScienceFujian Agriculture and Forestry UniversityFuzhouChina
- China‐Ireland International Cooperation Centre for Food Material Science and Structural DesignFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special StarchFujian Agriculture and Forestry UniversityFuzhouChina
| | - Baodong Zheng
- College of Food ScienceFujian Agriculture and Forestry UniversityFuzhouChina
- China‐Ireland International Cooperation Centre for Food Material Science and Structural DesignFujian Agriculture and Forestry UniversityFuzhouChina
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special StarchFujian Agriculture and Forestry UniversityFuzhouChina
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27
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Negi S, Pahari S, Das DK, Khan N, Agrewala JN. Curdlan Limits Mycobacterium tuberculosis Survival Through STAT-1 Regulated Nitric Oxide Production. Front Microbiol 2019; 10:1173. [PMID: 31191491 PMCID: PMC6547911 DOI: 10.3389/fmicb.2019.01173] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 05/08/2019] [Indexed: 12/16/2022] Open
Abstract
Host-directed therapies have emerged as an innovative and promising approach in tuberculosis (TB) treatment due to the observed limitations of current TB regimen such as lengthy duration and emergence of drug resistance. Thus, we explored the role of curdlan (beta glucan polysaccharide) as a novel strategy to activate macrophages against Mycobacterium tuberculosis (Mtb). The aim of the study was to investigate the role of curdlan in restricting the Mtb growth both in vitro and in vivo. Further, the immunomodulatory potential of curdlan against Mtb and the underlying mechanism is largely unknown. We found that curdlan treatment enhanced the antigen presentation, pro-inflammatory cytokines, Mtb uptake and killing activity of macrophages. In vivo studies showed that curdlan therapy significantly reduced the Mtb burden in lung and spleen of mice. Administration of curdlan triggered the protective Th1 and Th17 immunity while boosting the central and effector memory response in Mtb infected mice. Curdlan mediated anti-Mtb activity is through signal transducer and activator of transcription-1 (STAT-1), which regulates nitric oxide (NO) production through inducible NO synthase (iNOS) induction; along with this activation of nuclear factor kappa B (NF-κB) was also evident in Mtb infected macrophages. Thus, we demonstrate that curdlan exerts effective anti-tuberculous activity anti-tuberculous activity. It can be used as a potential host-directed therapy against Mtb.
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Affiliation(s)
- Shikha Negi
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India
| | - Susanta Pahari
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India.,Immunology Division, Texas Biomedical Research Institute, San Antonio, TX, United States
| | - Deepjyoti Kumar Das
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India
| | - Nargis Khan
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India.,Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
| | - Javed N Agrewala
- Immunology Division, CSIR - Institute of Microbial Technology, Chandigarh, India.,Department of Biomedical Engineering, Indian Institute of Technology Ropar, Rupnagar, India
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28
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Jiang S, Cao CA, Xia XF, Liu Q, Kong BH. Enhancement of the Textural and Gel Properties of Frankfurters by Adding Thermo-reversible or Thermo-irreversible Curdlan Gels. J Food Sci 2019; 84:1068-1077. [PMID: 30990884 DOI: 10.1111/1750-3841.14595] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/23/2019] [Accepted: 03/13/2019] [Indexed: 12/22/2022]
Abstract
The influence of different addition levels (0.1% to 0.5%) of thermo-reversible curdlan gels (TRC) and thermo-irreversible curdlan gels (TIRC) on the physicochemical and textural characteristics of frankfurters, as well as dynamic rheological properties of meat batters, was investigated. Increased percentages of TRC and TIRC were associated with lower cooking loss and quicker relaxation times, as well as superior emulsion stability, and higher L* -values and b* -values of frankfurters (P < 0.05). Moreover, with equal curdlan concentrations from 0.3% to 0.5%, TRC showed higher hardness and chewiness values than those with added TIRC (P < 0.05), but the gumminess, springiness, and resilience values were almost the same between each treatment (P > 0.05). The textural profile results were in strong agreement with the rheological data. Principal component analysis revealed that certain quality attributes were affected differently by the inclusion levels of TRC and TIRC. Additionally, the distinctive mechanism of the formation of the complex meat protein network by TRC or TIRC was also clarified and verified via scanning electron microscopy analysis. Further studies will investigate the molecular interactions of meat proteins with these two types of curdlan gels as a function of addition levels. PRACTICAL APPLICATION: Curdlan can form two different types of gels mainly depending on heating temperature, designated as thermo-reversible curdlan gels (TRC) and thermo-irreversible curdlan gels (TIRC), respectively. The addition of these two gels could improve the textural and gel properties of frankfurters, as well as improve the rheological profiles of meat batters. Each gel type invokes a different mechanism of influence on the formation of the complex meat protein network. Results indicate that TRC (mainly as an effective gelling agent) and TIRC (mainly as a potential fat-mimetic) can provide distinctive frankfurter formulations catered to the requirements preferred by different consumers.
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Affiliation(s)
- Shuai Jiang
- College of Food Science, Northeast Agricultural Univ., Harbin, 150030, Heilongjiang, China.,College of Food Science and Technology, Nanjing Agricultural Univ., Nanjing, 210095, Jiangsu, China
| | - Chuan-Ai Cao
- College of Food Science, Northeast Agricultural Univ., Harbin, 150030, Heilongjiang, China
| | - Xiu-Fang Xia
- College of Food Science, Northeast Agricultural Univ., Harbin, 150030, Heilongjiang, China
| | - Qian Liu
- College of Food Science, Northeast Agricultural Univ., Harbin, 150030, Heilongjiang, China
| | - Bao-Hua Kong
- College of Food Science, Northeast Agricultural Univ., Harbin, 150030, Heilongjiang, China
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29
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Fang Q, Gu T, Fan J, Zhang Y, Wang Y, Zhao Y, Zhao P. Evaluation of a hybrid small caliber vascular graft in a rabbit model. J Thorac Cardiovasc Surg 2019; 159:461-473. [PMID: 30981517 DOI: 10.1016/j.jtcvs.2019.02.083] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 02/16/2019] [Accepted: 02/20/2019] [Indexed: 11/26/2022]
Abstract
OBJECTIVE A hybrid small-caliber artificial vascular graft based on bilayer porcine small intestinal submucosa (SIS) with curdlan and dipyridamole mixture film serving as the so-called sandwich filler was developed for biological performance evaluation. We evaluated the performance of the graft and filler. METHODS SIS was coated with heparin by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide. Curdlan acted as the carrier of dipyridamole. Three types of graft tubes (2 mm internal diameter and 20 mm in length) were manufactured: bilayer SIS with 10% curdlan + 10% dipyridamole mixture film (SCD), bilayer SIS with 10% curdlan film (SC), and monolayer SIS (S). The remodeling characteristics of the grafts were evaluated by implanting them as bypass in rabbit carotid arteries for 2 and 3 months. Each group contained 16 rabbits, and 16 nonsurgical rabbits served as the control group. RESULTS Eight rabbits of each group, including the graft occluded group, were killed at 2 months and the others were killed at 3 months. Follow-up showed that all 8 grafts in SCD group were patent at 2 months. Six of 16 grafts in the SC group and 5 of 16 grafts in the S group were occluded at 2 months. One of 8 SCD grafts were occluded at 3 months and the patent showed a confluent endothelium without intimal hyperplasia. The neointima layer was composed of circumferentially aligned vascular smooth muscle cells. At 3 months, SC and S group grafts showed incomplete endothelialization and varying degrees of mural thrombus, accompanied by occlusion in the SC group (3 of 8) and S group (2 of 8). CONCLUSIONS The novel hybrid small caliber artificial vascular graft exhibited an improvement in revascularization resulting in high patency rate.
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Affiliation(s)
- Qin Fang
- Cardiac Surgery, First Hospital of China Medical University, Shenyang, China
| | - Tianxiang Gu
- Cardiac Surgery, First Hospital of China Medical University, Shenyang, China.
| | - Jun Fan
- Department of Tissue Engineering, China Medical University, Shenyang, China
| | - Yuanming Zhang
- Cardiac Surgery, First Hospital of China Medical University, Shenyang, China
| | - Yongchao Wang
- Cardiac Surgery, First Hospital of China Medical University, Shenyang, China
| | - Ye Zhao
- Cardiac Surgery, First Hospital of China Medical University, Shenyang, China
| | - Pan Zhao
- Department of Tissue Engineering, China Medical University, Shenyang, China
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30
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Liu Z, Wang D, Sun X, Sun Q, Wu Y, Xu Y. Construction and Characterization of Phthalocyanine-Loaded Particles of Curdlan and Their Photosensitivity. Int J Mol Sci 2018; 19:ijms19113323. [PMID: 30366405 PMCID: PMC6274969 DOI: 10.3390/ijms19113323] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 09/24/2018] [Revised: 10/18/2018] [Accepted: 10/23/2018] [Indexed: 11/17/2022] Open
Abstract
To optimize the physicochemical properties of phthalocyanine (PC), we examined its behavior in particles of triple helix glucan curdlan (CUR). CUR was denatured and renatured in DMSO, in the presence of PC. Infrared spectroscopy and transmission electron microscopy (TEM) showed that PC and CUR formed an inclusion complex, in which PC was trapped inside CUR molecules. This redshifted the absorption peak of PC, which would improve its usefulness as a photosensitizer, because infrared light can penetrate more deeply into human tissues. The conductivity of the solution of CUR-PC was higher than the conductivities of either a CUR solution or a PC dispersion, indicating that CUR-PC is more water soluble than PC. In addition, CUR-PC was highly stable in water. Thus, the use of CUR as a carrier of PC improves several of its physical properties. PC is used as a photosensitizer for killing cancer cells, but its use is hampered by its low solubility. Further, its absorption range limits its use to a depth of 1–3 mm in tissues. CUR-PC, with its high solubility and infrared absorption peak, was highly effective as a photosensitizer. It killed 84% of HeLa cells under 15 min of long wavelength radiation and had little cytotoxicity in the absence of light. These results demonstrate that CUR-PC has promise as a photosensitizer, as well as provide theoretical support for a wide range of applications for PC and CUR.
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Affiliation(s)
- Zonglin Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Dongfeng Wang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Xun Sun
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Qingjie Sun
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China.
| | - Yanjiang Wu
- Dalian Bangchuidao Marine Products Co., Ltd. Dalian 116000, China.
| | - Ying Xu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
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31
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Aizawa M, Watanabe K, Tominari T, Matsumoto C, Hirata M, Grundler FMW, Inada M, Miyaura C. Low Molecular-Weight Curdlan, (1→3)-β-Glucan Suppresses TLR2-Induced RANKL-Dependent Bone Resorption. Biol Pharm Bull 2018; 41:1282-1285. [PMID: 30068878 DOI: 10.1248/bpb.b18-00057] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Fungal β-glucan is a potent immunological stimulator, and that it activates both the innate immune system and adaptive immunity. Curdlan is (1→3)-β-glucan, a linear form of β-glucan with a high molecular weight; it modulates the immune response. However, its role in bone tissue is controversial, and the effects of curdlan on bone tissues are unknown. Toll-like receptors (TLRs) play critical roles in innate immunity, and various ligands for TLRs are thought to regulate the host defense mechanisms against pathogens. TLR2 is known to form heterodimers with TLR6, and the TLR2-TLR6 heterodimer (TLR2/6) recognizes diacylated lipopeptides from Gram-positive bacteria. In the present study, we prepared low molecular-weight curdlan, (1→3)-β-D-glucan, and examined its effects on bone resorption induced by TLR2/6 signaling. In co-cultures of bone marrow cells and osteoblasts, low molecular-weight curdlan suppressed the osteoclast formation induced by TLR2/6 ligand, and attenuated bone resorption in mouse calvarial organ cultures. Curdlan acted on mouse osteoblasts and suppressed the expression of receptor activator of nuclear factor-kappa B (NF-κB) ligand (RANKL), a key molecule for osteoclastogenesis. Curdlan also acted on mouse bone marrow macrophages and suppressed RANKL-dependent osteoclast differentiation from osteoclast precursor cells. The present study indicates that low molecular-weight curdlan attenuated TLR2-induced inflammatory bone resorption. Curdlan, (1→3)-β-glucan may be a natural agent with beneficial effects on bone health in humans.
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Affiliation(s)
- Maki Aizawa
- Cooperative Major of Advanced Health Science, Tokyo University of Agriculture and Technology
| | - Kenta Watanabe
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology
| | - Tsukasa Tominari
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology
| | - Chiho Matsumoto
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology
| | - Michiko Hirata
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology
| | - Florian M W Grundler
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology.,Institute of Crop Science and Resource Conservation, University of Bonn
| | - Masaki Inada
- Cooperative Major of Advanced Health Science, Tokyo University of Agriculture and Technology.,Institute of Global Innovation Research, Tokyo University of Agriculture and Technology.,Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology
| | - Chisato Miyaura
- Cooperative Major of Advanced Health Science, Tokyo University of Agriculture and Technology.,Institute of Global Innovation Research, Tokyo University of Agriculture and Technology.,Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology
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32
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Cachat J, Deffert C, Alessandrini M, Roux-Lombard P, Le Gouellec A, Stasia MJ, Hugues S, Krause KH. Altered Humoral Immune Responses and IgG Subtypes in NOX2-Deficient Mice and Patients: A Key Role for NOX2 in Antigen-Presenting Cells. Front Immunol 2018; 9:1555. [PMID: 30050527 PMCID: PMC6050363 DOI: 10.3389/fimmu.2018.01555] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 06/25/2018] [Indexed: 01/08/2023] Open
Abstract
Chronic granulomatous disease (CGD) is a primary immunodeficiency resulting from loss of function mutations in the reactive oxygen species generating phagocyte NADPH oxidase (NOX2). CGD patients are prone to infection, but also have an increased susceptibility to autoimmune diseases. The aim of this study was to investigate the role of NOX2 in the regulation of specific immunity. In both CGD patients and NOX2-deficient mice, we observed an alteration in the basal proportions of IgG subtypes. Upon immunization with curdlan-a dectin 1 agonist-NOX2-deficient mice showed increased production of IgG2c compared to controls, and restimulation of lymph node-derived cells led to increased production of IFNγ, but not IL-5, indicative hallmark of an enhanced Th1 response. T cell activation was increased in NOX2-deficient mice and a similar trend was observed in vitro when T cells were co-cultured with NOX2-deficient bone marrow-derived cells. In contrast, no difference in T cell activation was observed when NOX2-deficient T cells were co-cultured with wild-type BMDC. Following stimulation of NOX2-deficient dendritic cells (DCs), no difference in costimulatory molecules was observed, while there was an increase in the release of Th1-driving cytokines. In summary, both CGD patients and CGD mice have an altered IgG subtype distribution, which is associated with an increased IFNγ production. Thus, NOX2 within DCs appears to be an important regulator at the interface of innate and specific immunity, especially after activation of the dectin 1 pathway, limiting immune activation and the development of autoimmunity.
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Affiliation(s)
- Julien Cachat
- Department of Pathology and Immunology, Geneva University Hospitals (HUG) and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Christine Deffert
- Division of Laboratory Medicine, Department of Genetic and Laboratory Medicine and Department of Medical Specialities, Geneva University Hospitals (HUG) and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Marco Alessandrini
- Department of Pathology and Immunology, Geneva University Hospitals (HUG) and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Pascale Roux-Lombard
- Division of Laboratory Medicine, Department of Genetic and Laboratory Medicine and Department of Medical Specialities, Geneva University Hospitals (HUG) and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Audrey Le Gouellec
- TheREx (Thérapeutique Recombinante Expérimentale), Laboratoire TIMC-IMAG, University Grenoble Alpes, CNRS, Grenoble, France.,Laboratoire BEP, Pôle Biologie, CHU Grenoble Alpes, Grenoble, France
| | - Marie-José Stasia
- TheREx (Thérapeutique Recombinante Expérimentale), Laboratoire TIMC-IMAG, University Grenoble Alpes, CNRS, Grenoble, France.,Laboratoire BEP, Pôle Biologie, CHU Grenoble Alpes, Grenoble, France
| | - Stéphanie Hugues
- Department of Pathology and Immunology, Geneva University Hospitals (HUG) and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Karl-Heinz Krause
- Department of Pathology and Immunology, Geneva University Hospitals (HUG) and Faculty of Medicine, University of Geneva, Geneva, Switzerland
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33
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Monajemi M, Pang YCF, Bjornson S, Menzies SC, van Rooijen N, Sly LM. Malt1 blocks IL-1β production by macrophages in vitro and limits dextran sodium sulfate-induced intestinal inflammation in vivo. J Leukoc Biol 2018; 104:557-572. [PMID: 29901822 DOI: 10.1002/jlb.3vma0118-019r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 05/03/2018] [Accepted: 05/15/2018] [Indexed: 01/02/2023] Open
Abstract
This study tested the hypothesis that Malt1 deficiency in macrophages contributes to dextran sodium sulfate (DSS)-induced intestinal inflammation in Malt1-deficient mice. In people, combined immunodeficiency caused by a homozygous mutation in the MALT1 gene is associated with increased susceptibility to bacterial infections and chronic inflammation, including severe inflammation along the gastrointestinal tract. The consequences of Malt1 deficiency have largely been attributed to its role in lymphocytes, but Malt1 is also expressed in macrophages, where it is activated downstream of TLR4 and dectin-1. The effect of Malt1 deficiency in murine macrophages and its contribution to DSS-induced colitis have not been investigated. Our objectives were to compare the susceptibility of Malt1+/+ and Malt1-/- mice to DSS-induced colitis, to determine the contribution of macrophages to DSS-induced colitis in Malt1-/- mice, and to assess the effect of innate immune stimuli on Malt1-/- macrophage inflammatory responses. We found that Malt1 deficiency exacerbates DSS-induced colitis in mice, accompanied by higher levels of IL-1β, and that macrophages and IL-1 signaling contribute to pathology in Malt1-/- mice. Malt1-/- macrophages produce more IL-1β in response to either TLR4 or dectin-1 ligation, whereas inhibition of Malt1 proteolytic (paracaspase) activity blocked IL-1β production. TLR4 or dectin-1 stimulation induced Malt1 protein levels but decreased its paracaspase activity. Taken together, these data support the hypothesis that Malt1-/- macrophages contribute to increased susceptibility of Malt1-/- mice to DSS-induced colitis, which is dependent on IL-1 signaling. Increased IL-1β production by MALT1-deficient macrophages may also contribute to chronic inflammation in people deficient in MALT1.
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Affiliation(s)
- Mahdis Monajemi
- Department of Pediatrics, Division of Gastroenterology, BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Yvonne C F Pang
- Department of Pediatrics, Division of Gastroenterology, BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Saelin Bjornson
- Department of Pediatrics, Division of Gastroenterology, BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Susan C Menzies
- Department of Pediatrics, Division of Gastroenterology, BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Nico van Rooijen
- Department of Molecular Cell Biology, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Laura M Sly
- Department of Pediatrics, Division of Gastroenterology, BC Children's Hospital Research Institute, The University of British Columbia, Vancouver, British Columbia, Canada
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34
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Liang Y, Zhu L, Gao M, Wu J, Zhan X. Effective production of biologically active water-soluble β-1,3-glucan by a coupled system of Agrobacterium sp. and Trichoderma harzianum. Prep Biochem Biotechnol 2018; 48:446-456. [PMID: 29561218 DOI: 10.1080/10826068.2018.1452259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Water-soluble β-1,3-glucan (w-glucan) prepared from curdlan is reported to possess various bioactive and medicinal properties. To develop an efficient and cost-effective microbial fermentation method for the direct production of w-glucan, a coupled fermentation system of Agrobacterium sp. and Trichoderma harzianum (CFS-AT) was established. The effects of Tween-80, glucose flow rate, and the use of a dissolved oxygen (DO) control strategy on w-glucan production were assessed. The addition of 10 g L-1 Tween-80 to the CFS-AT enhanced w-glucan production, presumably by loosening the curdlan ultrastructure and increasing the efficiency of curdlan hydrolysis. A two-stage glucose and DO control strategy was optimal for w-glucan production. At the T. harzianum cell growth stage, the optimal glucose flow rate and agitation speed were 2.0 g L-1 hr-1 and 600 rpm, respectively, and at the w-glucan production stage, they were 0.5 g L-1 hr-1 and 400 rpm, respectively. W-glucan production reached 17.31 g L-1, with a degree of polymerization of 19-25. Furthermore, w-glucan at high concentrations exhibited anti-tumor activity against MCF-7, HepG2, and Hela cancer cells in vitro. This study provides a novel, cost-effective, eco-friendly, and efficient microbial fermentation method for the direct production of biologically active w-glucan.
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Affiliation(s)
- Ying Liang
- a Ministry of Education, Key Lab Carbohydrate Chemical and Biotechnology, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu , China
| | - Li Zhu
- b Jiangsu Rayguang Biotech Co. Ltd. , Wuxi , Jiangsu , China
| | - Minjie Gao
- a Ministry of Education, Key Lab Carbohydrate Chemical and Biotechnology, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu , China
| | - Jianrong Wu
- a Ministry of Education, Key Lab Carbohydrate Chemical and Biotechnology, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu , China
| | - Xiaobei Zhan
- a Ministry of Education, Key Lab Carbohydrate Chemical and Biotechnology, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu , China
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35
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Abstract
6-Amino-6-deoxy-curdlan is a promising nucleic acid carrier that efficiently delivers plasmid DNA as well as short interfering RNA (siRNA) to various cell lines. The highly reactive C6-NH2 groups of 6-amino-6-deoxy-curdlan prompt conjugation of various side groups including tissue-targeting ligands to enhance cell-type-specific nucleic acid delivery to specific cell lines. Herein, to test the primary-cell-targeting efficiency of the curdlan derivative, we chemically conjugated a macrophage-targeting ligand, mannose, to 6-amino-6-deoxy-curdlan. The resulting curdlan derivative (denoted CMI) readily complexed with siRNA and formed nanoparticles with a diameter of 50-80 nm. The CMI nanoparticles successfully delivered a dye-labeled siRNA to mouse peritoneal macrophages. The delivery efficiency was blocked by mannan, a natural ligand for a macrophage surface mannose receptor (CD206), but not by zymosan, a ligand for the dectin-1 receptor, which is also present on the surface of macrophages. Moreover, CMI nanoparticles were internalized by macrophages only at 37 °C, suggesting that the cellular uptake of CMI nanoparticles was energy-dependent. Furthermore, CMI nanoparticle efficiently delivered siRNA against tumor necrosis factor α (TNFα) to lipopolysaccharide-stimulated primary mouse peritoneal macrophages. In vivo experiments demonstrated that CMI nanoparticles successfully delivered siTNFα to mouse peritoneal macrophages, liver, and lung and induced significant knockdown of the TNFα expression at both messenger RNA and protein levels. Therefore, our design of CMI may be a promising siRNA carrier for targeting CD206-expressing primary cells such as macrophage and dendritic cells.
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Affiliation(s)
- Tsogzolmaa Ganbold
- School of Chemistry & Chemical Engineering, Inner Mongolia Key Laboratory of Mongolian Medicinal Chemistry , Inner Mongolia University , 235 West College Road , Hohhot , Inner Mongolia 010020 , P. R. China
| | - Huricha Baigude
- School of Chemistry & Chemical Engineering, Inner Mongolia Key Laboratory of Mongolian Medicinal Chemistry , Inner Mongolia University , 235 West College Road , Hohhot , Inner Mongolia 010020 , P. R. China
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36
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Kim SH, Zhong X, Kim W, Kim K, Suh YG, Kim C, Joe Y, Chung HT, Cha YN, Surh YJ. Taurine chloramine potentiates phagocytic activity of peritoneal macrophages through up-regulation of dectin-1 mediated by heme oxygenase-1-derived carbon monoxide. FASEB J 2018; 32:2246-2257. [PMID: 29247123 DOI: 10.1096/fj.201700817r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Resolution of inflammation that occurs after microbial infection or tissue damage is an important physiologic process in maintaining or restoring host homeostasis. Taurine chloramine (TauCl) is formed by a reaction between taurine and hypochlorite in leukocytes, and it is especially abundant in activated neutrophils that encounter an oxidative burst. As neutrophils undergo apoptosis, TauCl is released to the extracellular matrix at the inflamed sites, thereby affecting coexisting macrophages in the inflammatory microenvironment. In this study, we investigated the role of TauCl in phagocytosis by macrophages during resolution of fungal infection-induced inflammation. We found that exogenous TauCl substantially increased the phagocytic efficiency of macrophages through up-regulation of dectin-1, a receptor for fungal β-1,3-glucans, which is present on the membrane of macrophages. Our previous studies demonstrated the induction of heme oxygenase-1 (HO-1) expression in murine peritoneal macrophages treated with TauCl. In the present study, knocking out HO-1 or pharmacologic inhibition of HO-1 with zinc protoporphyrin IX attenuated the TauCl-induced expression of dectin-1 and subsequent phagocytosis. Furthermore, carbon monoxide (CO), a by-product of the HO-1-catalyzed reaction, induced expression of dectin-1 and potentiated phagocytic capability of the macrophages, which appeared to be mediated through up-regulation of peroxisome proliferator-activated receptor γ. Taken together, induction of HO-1 expression and subsequent CO production by TauCl are essential for phagocytosis of fungi by macrophages. Our results suggest that TauCl has important roles in host defense against fungal infection and has therapeutic potential in the management of inflammatory diseases.-Kim, S. H., Zhong, X., Kim, W., Kim, K., Suh, Y.-G., Kim, C., Joe, Y., Chung, H. T., Cha, Y.-N., Surh, Y.-J. Taurine chloramine potentiates phagocytic activity of peritoneal macrophages through up-regulation of dectin-1 mediated by heme oxygenase-1-derived carbon monoxide.
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Affiliation(s)
- Seung Hyeon Kim
- Tumor Microenvironment Global Core Research Center, Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea.,Cancer Research Institute Seoul National University, Seoul, South Korea
| | - Xiancai Zhong
- Tumor Microenvironment Global Core Research Center, Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Wonki Kim
- Tumor Microenvironment Global Core Research Center, Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Kyeojin Kim
- Tumor Microenvironment Global Core Research Center, Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Young-Ger Suh
- Tumor Microenvironment Global Core Research Center, Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Chaekyun Kim
- Department of Pharmacology and Toxicology, College of Medicine, Inha University, Incheon, South Korea
| | - Yeonsoo Joe
- Department of Biological Sciences, University of Ulsan, Ulsan, South Korea
| | - Hun Taeg Chung
- Department of Biological Sciences, University of Ulsan, Ulsan, South Korea
| | - Young-Nam Cha
- Department of Pharmacology and Toxicology, College of Medicine, Inha University, Incheon, South Korea
| | - Young-Joon Surh
- Tumor Microenvironment Global Core Research Center, Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea.,Cancer Research Institute Seoul National University, Seoul, South Korea.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
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37
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Hettle A, Fillo A, Abe K, Massel P, Pluvinage B, Langelaan DN, Smith SP, Boraston AB. Properties of a family 56 carbohydrate-binding module and its role in the recognition and hydrolysis of β-1,3-glucan. J Biol Chem 2017; 292:16955-16968. [PMID: 28827308 DOI: 10.1074/jbc.m117.806711] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/11/2017] [Indexed: 11/06/2022] Open
Abstract
BH0236 from Bacillus halodurans is a multimodular β-1,3-glucanase comprising an N-terminal family 81 glycoside hydrolase catalytic module, an internal family 6 carbohydrate-binding module (CBM) that binds the nonreducing end of β-1,3-glucan chains, and an uncharacterized C-terminal module classified into CBM family 56. Here, we determined that this latter CBM, BhCBM56, bound the soluble β-1,3-glucan laminarin with a dissociation constant (Kd ) of ∼26 μm and displayed higher affinity for insoluble β-1,3-glucans with Kd values of ∼2-10 μm but lacked affinity for β-1,3-glucooligosaccharides. The X-ray crystal structure of BhCBM56 and NMR-derived chemical shift mapping of the binding site revealed a β-sandwich fold, with the face of one β-sheet possessing the β-1,3-glucan-binding surface. On the basis of the functional and structural properties of BhCBM56, we propose that it binds a quaternary polysaccharide structure, most likely the triple helix adopted by polymerized β-1,3-glucans. Consistent with the BhCBM56 and BhCBM6/56 binding profiles, deletion of the CBM56 from BH0236 decreased activity of the enzyme on the insoluble β-1,3-glucan curdlan but not on soluble laminarin; additional deletion of the CBM6 also did not affect laminarin degradation but further decreased curdlan hydrolysis. The pseudo-atomic solution structure of BH0236 determined by small-angle X-ray scattering revealed structural insights into the nature of avid binding by the BhCBM6/56 pair and how the orientation of the active site in the catalytic module factors into recognition and degradation of β-1,3-glucans. Our findings reinforce the notion that catalytic modules and their cognate CBMs have complementary specificities, including targeting of polysaccharide quaternary structure.
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Affiliation(s)
- Andrew Hettle
- From the Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada and
| | - Alexander Fillo
- From the Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada and
| | - Kento Abe
- From the Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada and
| | - Patricia Massel
- From the Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada and
| | - Benjamin Pluvinage
- From the Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada and
| | - David N Langelaan
- the Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Steven P Smith
- the Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Alisdair B Boraston
- From the Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada and
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38
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Klimek K, Przekora A, Pałka K, Ginalska G. New method for the fabrication of highly osteoconductive β-1,3-glucan/HA scaffold for bone tissue engineering: Structural, mechanical, and biological characterization. J Biomed Mater Res A 2016; 104:2528-36. [PMID: 27239050 DOI: 10.1002/jbm.a.35798] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 05/20/2016] [Accepted: 05/26/2016] [Indexed: 01/27/2023]
Abstract
Recent studies have shown that thermal method for β-1,3-glucan (curdlan) gelation performed at temperature above 80°C enables fabrication of biocompatible bone scaffolds. The aim of this study was to establish new method for fabrication of β-1,3-glucan/hydroxyapatite (glu/HA) scaffold using ion-exchanging dialysis for curdlan gelation that allows for the modifications of the glu/HA material with thermo-sensitive agents like growth factors or adhesive proteins. Obtained results reveal that fabricated scaffold appears to be highly osteoconductive as it is nontoxic, promotes osteoblast growth and proliferation as well as increases bone alkaline phosphatase level thereby enhancing cell differentiation. It was demonstrated that developed new method for the glu/HA scaffold fabrication allows to obtain material that not only can be modified with thermo-sensitive agents at the stage of production process but also is a promising candidate for bone tissue engineering applications to act as a framework for osteoblasts to spread and form new bone. It should be noted that dialysis method for curdlan gelation has never been used before to fabricate bone scaffold. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 2528-2536, 2016.
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Affiliation(s)
- Katarzyna Klimek
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1, 20-093, Lublin, Poland
| | - Agata Przekora
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1, 20-093, Lublin, Poland
| | - Krzysztof Pałka
- Department of Materials Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618, Lublin, Poland
| | - Grażyna Ginalska
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1, 20-093, Lublin, Poland
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Zhu CC, Zhao GQ, Lin J, Hu LT, Xu Q, Peng XD, Wang X, Qiu S. Dectin-1 agonist curdlan modulates innate immunity to Aspergillus fumigatus in human corneal epithelial cells. Int J Ophthalmol 2015; 8:690-6. [PMID: 26309863 DOI: 10.3980/j.issn.2222-3959.2015.04.09] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 01/19/2015] [Indexed: 01/08/2023] Open
Abstract
AIM To explore the immunomodulatory effects of curdlan on innate immune responses against Aspergillus fumigatus (A. fumigatus) in cultured human corneal epithelial cells (HCECs), and whether C-type lectin receptor Dectin-1 mediates the immunomodulatory effects of curdlan. METHODS The HCECs were stimulated by curdlan in different concentrations (50, 100, 200, 400 µg/mL) for various time. Then HCECs pretreated with or without laminarin (Dectin-1 blocker, 0.3 mg/mL) and curdlan were stimulated by A. fumigatus hyphae. The mRNA and protein production of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were determined by real-time quantitative polymerase chain reaction and enzyme-linked immunosorbent assay, respectively. The protein level of Dectin-1 was measured by Western blot. RESULTS Curdlan stimulated mRNA expression of TNF-α and IL-6 in a dose and time dependent manner in HCECs. Curdlan pretreatment before A. fumigatus hyphae stimulation significantly enhanced the expression of TNF-α and IL-6 at mRNA and protein levels compared with A. fumigatus hyphae stimulation group (P<0.05). Both curdlan and A. fumigatus hyphae up-regulated Dectin-1 protein expression in HCECs, and Dectin-1 expression was elevated to 1.5- to 2-fold by curdlan pretreatment followed hyphae stimulation. The Dectin-1 blocker laminarin suppressed the mRNA expression and protein production of TNF-α and IL-6 induced by curdlan and hyphae (P<0.05). CONCLUSION These findings demonstrated that curdlan pretreatment enhanced the inflammatory response induced by A. fumigatus hyphae in HCECs. Dectin-1 is essential for the immunomodulatory effects of curdlan. Curdlan may have high clinical application values in fungal keratitis treatment.
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Affiliation(s)
- Cheng-Cheng Zhu
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
| | - Gui-Qiu Zhao
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
| | - Jing Lin
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
| | - Li-Ting Hu
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
| | - Qiang Xu
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
| | - Xu-Dong Peng
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
| | - Xue Wang
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
| | - Sheng Qiu
- Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
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Horiuchi M, Takahasi K, Kobashigawa Y, Ochiai M, Inagaki F. A low-cost affinity purification system using β-1,3-glucan recognition protein and curdlan beads. Protein Eng Des Sel 2012; 25:405-13. [PMID: 22706764 PMCID: PMC3390167 DOI: 10.1093/protein/gzs028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 12/08/2011] [Revised: 05/08/2012] [Accepted: 05/09/2012] [Indexed: 11/16/2022] Open
Abstract
Silkworm β-1,3-glucan recognition protein (βGRP) tightly and specifically associates with β-1,3-glucan. We report here an affinity purification system named the 'GRP system', which uses the association between the β-1,3-glucan recognition domain of βGRP (GRP-tag), as an affinity tag, and curdlan beads. Curdlan is a water-insoluble β-1,3-glucan reagent, the low cost of which (about 100 JPY/g) allows the economical preparation of beads. Curdlan beads can be readily prepared by solubilization in an alkaline solution, followed by neutralization, sonication and centrifugation. We applied the GRP system to preparation of several proteins and revealed that the expression levels of the GRP-tagged proteins in soluble fractions were two or three times higher than those of the glutathione S-transferase (GST)-tagged proteins. The purity of the GRP-tagged proteins on the curdlan beads was comparable to that of the GST-tagged proteins on glutathione beads. The chemical stability of the GRP system was more robust than conventional affinity systems under various conditions, including low pH (4-6). Biochemical and structural analyses revealed that proteins produced using the GRP system were structurally and functionally active. Thus, the GRP system is suitable for both the large- and small-scale preparation of recombinant proteins for functional and structural analyses.
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Affiliation(s)
- Masataka Horiuchi
- Laboratory of Biomolecular Science, Graduate School of Pharmaceutical Sciences, Hokkaido University, N-12, W-6, Kita-ku, Sapporo 060-0812, Japan
| | - Kiyohiro Takahasi
- Laboratory of Molecular Genetics, Institute for Virus Research, Kyoto University, Kyoto 606-8507, Japan
| | - Yoshihiro Kobashigawa
- Department of Structural Biology, Faculty of Advanced Life Science, Hokkaido University, N-21, W-11, Kita-ku, Sapporo 001-0021, Japan
| | - Masanori Ochiai
- Institute of Low Temperature Science, Hokkaido University, N-19, W-8, Kita-ku, Sapporo 060-0819, Japan
| | - Fuyuhiko Inagaki
- Department of Structural Biology, Faculty of Advanced Life Science, Hokkaido University, N-21, W-11, Kita-ku, Sapporo 001-0021, Japan
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