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Lee JH, Kim HJ, Ahn DU, Paik HD. Improved immune-enhancing activity of egg white protein ovotransferrin after enzyme hydrolysis. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2021; 63:1159-1168. [PMID: 34796354 PMCID: PMC8564309 DOI: 10.5187/jast.2021.e82] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/07/2021] [Accepted: 06/02/2021] [Indexed: 12/13/2022]
Abstract
Ovotransferrin (OTF), an egg protein known as transferrin family protein, possess strong antimicrobial and antioxidant activity. This is because OTF has two iron binding sites, so it has a strong metal chelating ability. The present study aimed to evaluate the improved immune-enhancing activities of OTF hydrolysates produced using bromelain, pancreatin, and papain. The effects of OTF hydrolysates on the production and secretion of pro-inflammatory mediators in RAW 264.7 macrophages were confirmed. The production of nitric oxide (NO) was evaluated using Griess reagent and the expression of inducible nitric oxide synthase (iNOS) were evaluated using quantitative real-time polymerase chain reaction (PCR). And the production of pro-inflammatory cytokines (tumor necrosis factor [TNF]-α and interleukin [IL]-6) and the phagocytic activity of macrophages were evaluated using an ELISA assay and neutral red uptake assay, respectively. All OTF hydrolysates enhanced NO production by increasing iNOS mRNA expression. Treating RAW 264.7 macrophages with OTF hydrolysates increased the production of pro-inflammatory cytokines and the phagocytic activity. The production of NO and pro-inflammatory cytokines induced by OTF hydrolysates was inhibited by the addition of specific mitogen-activated protein kinase (MAPK) inhibitors. In conclusion, results indicated that all OTF hydrolysates activated RAW 264.7 macrophages by activating MAPK signaling pathway.
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Affiliation(s)
- Jae Hoon Lee
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 05029, Korea
| | - Hyeon Joong Kim
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 05029, Korea
| | - Dong Uk Ahn
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA
| | - Hyun-Dong Paik
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 05029, Korea
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2
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Xie Y, Wang L, Sun H, Shang Q, Wang Y, Zhang G, Yang W, Jiang S. A polysaccharide extracted from alfalfa activates splenic B cells by TLR4 and acts primarily via the MAPK/p38 pathway. Food Funct 2021; 11:9035-9047. [PMID: 33021613 DOI: 10.1039/d0fo01711f] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Alfalfa polysaccharide (APS) has been proposed to exhibit growth-promoting and immune-enhancing bodily functions in vivo. However, little is known about its downstream immunomodulatory and intrinsic molecular mechanisms. Herein, mouse splenic lymphocytes were isolated to characterize the immunomodulatory effects and molecular mechanisms of APS in vitro. The results demonstrated that APS selectively improved the cell viability and IgM production of B cells, but no effects on T cell viability or secretion of IL-2, IL-4 and IFN-γ were observed in vitro. The receptor blocking assay showed that TLR4 was the primary receptor involved in APS-mediated B cell activation, which was confirmed by the results obtained using C57BL/10ScNJ (TLR4 gene-deficient) mice. Moreover, APS activated the TLR4-MyD88 signaling pathway at the translational level by significantly increasing the protein expression of TLR4 and MyD88. Downstream pathway blocking assay demonstrated that both the MAPK and NF-κB pathways were involved in APS-induced B cell activation. Additionally, APS significantly enhanced the phosphorylation of p38, ERK, and JNK and activated the nuclear translocation of the NF-κB p65 subunit. Therefore, we concluded that APS specifically activates the immune functions of splenic B cells by TLR4, acting through the MAPK and NF-κB signaling pathways, and potently activates the p38 pathway.
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Affiliation(s)
- Yuhuai Xie
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
| | - Lixue Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
| | - Hua Sun
- Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China
| | - Qinghui Shang
- Department of Animal Science and Technology, China Agricultural University, Beijing, 100083, PR China
| | - Yuxi Wang
- Lethbridge Research Centre, Agriculture and Agri-Food C, anadaLethbridge, Alberta T1J 4B1, Canada
| | - Guiguo Zhang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
| | - Weiren Yang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
| | - Shuzhen Jiang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
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Zhong Y, Shen L, Ye X, Zhou D, He Y, Zhang H. Mechanism of immunosuppression in zebrafish (Danio rerio) spleen induced by environmentally relevant concentrations of perfluorooctanoic acid. CHEMOSPHERE 2020; 249:126200. [PMID: 32086066 DOI: 10.1016/j.chemosphere.2020.126200] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 02/08/2020] [Accepted: 02/11/2020] [Indexed: 05/14/2023]
Abstract
Perfluorooctanoic acid (PFOA) has been identified as a new persistent organic pollutant. This pollutant is ubiquitous in water and environments. Although PFOA is toxic to fishes, the precise immunotoxicological mechanism remains unclear. In this study, HPLC-MS analysis proved that PFOA can accumulate in the spleen of zebrafish. As comparison of 7-day and 14-day data, the cumulative content in the spleen significantly increased by 26% even in the 0.1 mg/L PFOA-treated group. Morphological observations revealed that PFOA can damage immune cells in zebrafish spleen by inducing vacuolization, lipofuscin granule production, and mitochondrial swelling. The Toll-like receptor 2 (TLR2)/myeloid differentiation factor 88 (myd88)/NF-κB (P65) pathway can mediate the mRNA expression levels of interferon (IFN) and B cell-activating factor (BAFF); immunoglobulin (Ig) secretion is further regulated. RT-PCR results indicated that the expression levels of P65 and IFN in the 1 mg/L group after PFOA exposure for 7 d increased by 4.03- and 3.28-fold, respectively, in a dose-dependent manner compared with those of the control group. The linear correlation coefficient (r2) was analyzed, and the results indicated that the Ig-mediated pathway can be affected by PFOA. For example, the r2 between IgD and P65 decreased from 0.641 (7 d) to 0.295 (14 d) after the cells were exposed to PFOA for a prolonged time; the r2 between IgD and IFN increased from 0.562 (7 d) to 0.808 (14 d). The triangle plot method strongly demonstrated that increased PFOA concentration and prolonged exposure to PFOA can inhibit Ig secretion. Therefore, immune organs, particularly the spleen, of zebrafish are vulnerable to PFOA. These results can help to improve the understanding of the possible noncarcinogenic risk mechanisms induced by PFOA.
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Affiliation(s)
- Yuchi Zhong
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Lilai Shen
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Xueping Ye
- Zhejiang Institute of Freshwater Fisheries, South Changqiao Road 999#, Huzhou, Zhejiang Province, 313001, China.
| | - Dongren Zhou
- Zhejiang Institute of Freshwater Fisheries, South Changqiao Road 999#, Huzhou, Zhejiang Province, 313001, China.
| | - Yunyi He
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Hangjun Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
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Manlusoc JKT, Hsieh CL, Hsieh CY, Salac ESN, Lee YT, Tsai PW. Pharmacologic Application Potentials of Sulfated Polysaccharide from Marine Algae. Polymers (Basel) 2019; 11:polym11071163. [PMID: 31288474 PMCID: PMC6680640 DOI: 10.3390/polym11071163] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/30/2019] [Accepted: 07/02/2019] [Indexed: 01/30/2023] Open
Abstract
With the advent of exploration in finding new sources for treating different diseases, one possible natural source is from marine algae. Having an array of potential benefits, researchers are interested in the components which comprise one of these activities. This can lead to the isolation of active compounds with biological activities, such as antioxidation of free radicals, anti-inflammation, antiproliferation of cancer cells, and anticoagulant to name a few. One of the compounds that are isolated from marine algae are sulfated polysaccharides (SPs). SPs are complex heterogenous natural polymers with an abundance found in different species of marine algae. Marine algae are known to be one of the most important sources of SPs, and depending on the species, its chemical structure varies. This variety has important physical and chemical components and functions which has gained the attention of researchers as this contributes to the many facets of its pharmacologic activity. In this review, recent pharmacologic application potentials and updates on the use of SPs from marine algae are discussed.
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Affiliation(s)
| | - Chieh-Lun Hsieh
- Department of Athletics Sports, College of Humanities and Social Sciences, Chang Jung Christian University, Tainan 711, Taiwan
| | - Cheng-Yang Hsieh
- Graduate Institute of Medical Sciences, College of Health Sciences, Chang Jung Christian University, Tainan 711, Taiwan
| | - Ellen San Nicolas Salac
- Office of the Vice President for Academic Affairs, Emilio Aguinaldo College, Manila 1000, Philippines
| | - Ya-Ting Lee
- Department of Beauty Science, National Taichung University of Science and Technology, Taichung 404, Taiwan.
| | - Po-Wei Tsai
- Department of Medical Sciences Industry, College of Health Sciences, Chang Jung Christian University, Tainan 711, Taiwan.
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Xie Y, Wang L, Sun H, Wang Y, Yang Z, Zhang G, Jiang S, Yang W. Polysaccharide from alfalfa activates RAW 264.7 macrophages through MAPK and NF-κB signaling pathways. Int J Biol Macromol 2018; 126:960-968. [PMID: 30590152 DOI: 10.1016/j.ijbiomac.2018.12.227] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/15/2018] [Accepted: 12/22/2018] [Indexed: 12/14/2022]
Abstract
Alfalfa polysaccharide (APS), a bioactive compound extracted from alfalfa, has been proposed to exhibit potential growth-promoting and immune-enhancing functions. But, little is known about the cellular immunomodulatory and intrinsic molecular mechanisms. Here we extracted the APS, and performed in vitro experiments to characterize the immunomodulatory functions as well as the molecular mechanisms of APS on RAW 264.7 macrophages cells. Chemical analyses showed that APS was mainly composed of fucose, arabinose, galactose, glucose, xylose, mannose, galacturonic acid and glucuronic acid. The results of in vitro assays demonstrated that 50 and 100 μg/mL APS increased the cell viability of RAW 264.7 cells. The secretion and gene expression of NO/iNOS, IL-6 and TNF-α in APS-induced macrophage cell were significantly enhanced. However, APS-induced TNF-α production was decreased by blocking the MAPK or NF-κB signaling pathways, especially for the blockade of p38. Moreover, APS enhanced the phosphorylation of p38, ERK, and JNK, promoted the degradation of IκBα, and increased the nuclear translocation of NF-κB p65 subunit. Therefore, we demonstrated that APS could improve the immune functions of RAW 264.7 macrophages cells by promoting the cell viability and increasing secretion and gene expressions of NO/iNOS, IL-6 and TNF-α through the MAPK and NF-κB signaling pathways.
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Affiliation(s)
- Yuhuai Xie
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Lixue Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Hua Sun
- Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China
| | - Yuxi Wang
- Lethbridge Research Center, Agriculture and Agri-Food Canada, Lethbridge, Alberta T1J 4B1, Canada
| | - Zaibin Yang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Guiguo Zhang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Shuzhen Jiang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, PR China
| | - Weiren Yang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, PR China.
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Wang L, Oh JY, Kim HS, Lee W, Cui Y, Lee HG, Kim YT, Ko JY, Jeon YJ. Protective effect of polysaccharides from Celluclast-assisted extract of Hizikia fusiforme against hydrogen peroxide-induced oxidative stress in vitro in Vero cells and in vivo in zebrafish. Int J Biol Macromol 2018; 112:483-489. [PMID: 29408712 DOI: 10.1016/j.ijbiomac.2018.01.212] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 01/16/2018] [Accepted: 01/31/2018] [Indexed: 12/20/2022]
Abstract
Polysaccharides were extracted by Celluclast-assisted hydrolysis and ethanol precipitation from Hizikia fusiforme (HFPS), and their in vitro antioxidant effects were evaluated in Vero cells. HFPS contains 63.56±0.32% sulfate polysaccharides, which comprise fucose (53.53%), galactose (23.15%), glucose (5.95%), and xylose (17.37%). HFPS scavenged DPPH, alkyl, and hydroxyl radicals at IC50 values of 0.81±0.02, 0.25±0.02, and 0.21±0.03mg/mL, respectively. HFPS significantly reduced H2O2-induced cytotoxicity in Vero cells. Furthermore, HFPS reduced intracellular ROS levels, and H2O2-induced apoptosis. HFPS has a strong protective effect against H2O2-stimulated oxidative stress in vivo in zebrafish, and showed improved survival rate, decreased heart rate, and reduced ROS generation and cell death. These results suggest that HFPS may be useful as an antioxidant in medical and cosmetic industries.
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Affiliation(s)
- Lei Wang
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Jae Young Oh
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Hyun Soo Kim
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - WonWoo Lee
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Yongri Cui
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Hyo Geun Lee
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea
| | - Yong-Tae Kim
- Department of Food Science and Biotechnology, Kunsan National University, Kunsan 573-701, Republic of Korea
| | - Jae Young Ko
- Material Research Team, Amorepacific R&D Unit, Jeju 63243, Republic of Korea.
| | - You-Jin Jeon
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Republic of Korea.
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Koirala P, Jung HA, Choi JS. Recent advances in pharmacological research on Ecklonia species: a review. Arch Pharm Res 2017; 40:981-1005. [PMID: 28840539 PMCID: PMC7090987 DOI: 10.1007/s12272-017-0948-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 08/16/2017] [Indexed: 12/18/2022]
Abstract
The genus Ecklonia (Lessoniaceae, Phaeophyceae), commonly called kelp (brown algae), is abundant on the coasts of Japan and Korea. During the past few decades, Ecklonia species have received tremendous attention for their wide range of therapeutic properties and multiple health benefits, such as great nutritional value and being rich in vitamins, minerals, dietary fiber, proteins, and polysaccharides. Several novel functional ingredients with diversified biological activities have been isolated and possess antimicrobial, antiviral, hepatoprotective, cardioprotective, anti-inflammatory, neuroprotective, anticarcinogenic, immunomodulatory, hypolipidemic, anti-diabetic, and antioxidant therapeutic properties. The present review discusses the phytochemical, pharmacological, therapeutic, nutritional, and health benefits of different species of genus Ecklonia, as well as their use in the prevention of disease and maintenance of good health.
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Affiliation(s)
- Prashamsa Koirala
- Department of Food and Life Science, Pukyong National University, Busan, 48513, Republic of Korea
| | - Hyun Ah Jung
- Department of Food Science and Human Nutrition, Chonbuk National University, Jeonju, 54896, Republic of Korea.
| | - Jae Sue Choi
- Department of Food and Life Science, Pukyong National University, Busan, 48513, Republic of Korea.
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Lee W, Kang N, Kim EA, Yang HW, Oh JY, Fernando IPS, Kim KN, Ahn G, Jeon YJ. Radioprotective effects of a polysaccharide purified from Lactobacillus plantarum-fermented Ishige okamurae against oxidative stress caused by gamma ray-irradiation in zebrafish in vivo model. J Funct Foods 2017. [DOI: 10.1016/j.jff.2016.11.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Gartung A, Zhao J, Chen S, Mottillo E, VanHecke GC, Ahn YH, Maddipati KR, Sorokin A, Granneman J, Lee MJ. Characterization of Eicosanoids Produced by Adipocyte Lipolysis: IMPLICATION OF CYCLOOXYGENASE-2 IN ADIPOSE INFLAMMATION. J Biol Chem 2016; 291:16001-10. [PMID: 27246851 DOI: 10.1074/jbc.m116.725937] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Indexed: 12/29/2022] Open
Abstract
Excessive adipocyte lipolysis generates lipid mediators and triggers inflammation in adipose tissue. However, the specific roles of lipolysis-generated mediators in adipose inflammation remain to be elucidated. In the present study, cultured 3T3-L1 adipocytes were treated with isoproterenol to activate lipolysis and the fatty acyl lipidome of released lipids was determined by using LC-MS/MS. We observed that β-adrenergic activation elevated levels of approximately fifty lipid species, including metabolites of cyclooxygenases, lipoxygenases, epoxygenases, and other sources. Moreover, we found that β-adrenergic activation induced cyclooxygenase 2 (COX-2), not COX-1, expression in a manner that depended on activation of hormone-sensitive lipase (HSL) in cultured adipocytes and in the epididymal white adipose tissue (EWAT) of C57BL/6 mice. We found that lipolysis activates the JNK/NFκB signaling pathway and inhibition of the JNK/NFκB axis abrogated the lipolysis-stimulated COX-2 expression. In addition, pharmacological inhibition of COX-2 activity diminished levels of COX-2 metabolites during lipolytic activation. Inhibition of COX-2 abrogated the induction of CCL2/MCP-1 expression by β-adrenergic activation and prevented recruitment of macrophage/monocyte to adipose tissue. Collectively, our data indicate that excessive adipocyte lipolysis activates the JNK/NFκB pathway leading to the up-regulation of COX-2 expression and recruitment of inflammatory macrophages.
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Affiliation(s)
- Allison Gartung
- From the Bioactive Lipid Research Program, Department of Pathology
| | - Jiawei Zhao
- From the Bioactive Lipid Research Program, Department of Pathology
| | - Simon Chen
- From the Bioactive Lipid Research Program, Department of Pathology
| | | | | | | | | | - Andrey Sorokin
- Microbiology and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - James Granneman
- Center for Integrative Metabolic and Endocrine Research, Center for Molecular Medicine and Genetics
| | - Menq-Jer Lee
- From the Bioactive Lipid Research Program, Department of Pathology, Cardiovascular Research Institute, and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan 48202 and
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Feng H, Fan J, Du X, Song Z, Wang Z, Han X, Zhao B, Liu J. SulfatedRadix Cyathulae officinalisPolysaccharides Act as Adjuvant via Promoting the Dendritic Cell Maturation and Suppressing Treg Frequency. Immunol Invest 2015; 44:288-308. [DOI: 10.3109/08820139.2015.1009546] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Immunomodulatory activity of heparan sulfate mimetics from Escherichia coli K5 capsular polysaccharide in vitro. Carbohydr Polym 2015; 115:643-50. [DOI: 10.1016/j.carbpol.2014.08.119] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 08/23/2014] [Accepted: 08/28/2014] [Indexed: 12/17/2022]
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Cao RA, Lee Y, You S. Water soluble sulfated-fucans with immune-enhancing properties from Ecklonia cava. Int J Biol Macromol 2014; 67:303-11. [PMID: 24661888 DOI: 10.1016/j.ijbiomac.2014.03.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/04/2014] [Accepted: 03/11/2014] [Indexed: 12/29/2022]
Abstract
Water-soluble sulfated fucans isolated from Ecklonia cava were fractionated using an anion-exchange chromatography to investigate their molecular characteristics and immunomodulating activities. The crude fucoidan extract and purified fractions (EF1, EF2, and EF3) consisted mostly of different ratios of neutral sugars, proteins, sulfates, uronic acids, and their monosaccharide compositions were also significantly different. The backbone of the most immunoenhancing fraction, EF2, was mainly linked by (1→3)-linked fucopyranosyl and (1→4)-linked mannopyranosyl residues with sulfates at C-4 of fucopyranosyl units. The molecular weights of the crude fucoidan extract and purified fractions ranged from 8.3×10(3) to 442.6×10(3)g/mol. The crude extract, EF1 and EF2 stimulated RAW264.7 cells to produce considerable amounts of nitric oxide and cytokines. The treatment of cells with the sulfated fucans induced the degradation of Iκ-B and the phosphorylation of MAPK in RAW264.7 cells, implying that they might stimulate RAW264.7 cells through the activation of NF-κB and MAPK pathways.
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Affiliation(s)
- Rong-An Cao
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing 163319, China; Department of Marine Food Science and Technology, Gangneung-Wonju National University, 120 Gangneung Daehangno, Gangneung, Gangwon 210-702, South Korea
| | - YongJin Lee
- Chuncheon Bioindustry Foundation, Chuncheon, Gangwon 200-957, South Korea.
| | - SangGuan You
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 120 Gangneung Daehangno, Gangneung, Gangwon 210-702, South Korea.
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