1
|
Zhang X, Tang Y, Gao F, Xu X, Chen G, Li Y, Wang L. Low-cost and efficient strategy for brown algal hydrolysis: Combination of alginate lyase and cellulase. Bioresour Technol 2024; 397:130481. [PMID: 38395233 DOI: 10.1016/j.biortech.2024.130481] [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: 12/21/2023] [Revised: 02/19/2024] [Accepted: 02/20/2024] [Indexed: 02/25/2024]
Abstract
Brown algae are rich in biostimulants that not only stimulate the overall development and growth of plants but also have great beneficial effects on the whole soil-plant system. However, alginate, the major component of brown algae, is comparatively difficult to degrade. The cost of preparing alginate oligosaccharides (AOSs) is still too high to produce seaweed fertilizer. In this work, the marine bacterium Vibrio sp. B1Z05 is found to be capable of efficient alginate depolymerization and harbors an extended pathway for alginate metabolism. The B1Z05 extracellular cell-free supernatant exhibited great potential for AOS production at low cost, which, together with cellulase, can efficiently hydrolyze seaweed. The brown algal hydrolysis rates were significantly greater than those of the commercial alginate lyase product CE201, and the obtained seaweed extracts were rich in phytohormones. This work provides a low-cost but efficient strategy for the sustainable production of desirable AOSs and seaweed fertilizer.
Collapse
Affiliation(s)
- Xiyue Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Yongqi Tang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Feng Gao
- Qingdao Vland Biotech Company Group, Qingdao 266061, China
| | - Xiaodong Xu
- Qingdao Vland Biotech Company Group, Qingdao 266061, China
| | - Guanjun Chen
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Yingjie Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China.
| | - Lushan Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| |
Collapse
|
2
|
Wang S, Yu Y, Liu J, Hu S, Shi S, Feng W, Mao Y. Alginate oligosaccharide alleviates vascular aging by upregulating glutathione peroxidase 7. J Nutr Biochem 2024; 126:109578. [PMID: 38216066 DOI: 10.1016/j.jnutbio.2024.109578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 12/21/2023] [Accepted: 01/06/2024] [Indexed: 01/14/2024]
Abstract
Alginate oligosaccharide (AOS) may delay aging by decreasing oxidative stress, but the effects on vascular aging remain unclear. Here, we evaluate the effect of AOS on vascular aging and investigate the underlying mechanisms. Twenty-month-old rats acted as the natural aging model in vivo. Senescence of human aortic vascular smooth muscle cells (HA-VSMCs) was induced in vitro using angiotensin II (AngII). The aging rats and senescent cells were treated with AOS, followed by assessment of aging makers, oxidative stress, and aging-induced vascular remodeling. AOS treatment alleviated vascular aging and HA-VSMC senescence and decreased the levels of oxidative stress and vascular remodeling-associated indicators. AOS upregulated the expression of glutathione peroxidase 7 (GPX7) in aging rats and GPX7 depletion disrupted the geroprotective effect of AOS. AOS increased the nuclear translocation of nuclear factor erythroid-2-related factor (Nrf2) protein, which interacts with GPX7 protein to induce its expression. In conclusion, AOS alleviates vascular aging and HA-VSMC senescence and reduces aging-related vascular remodeling via the GPX7 antioxidant pathway, which may provide new avenues for treating aging-associated diseases.
Collapse
Affiliation(s)
- Shan Wang
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yao Yu
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jia Liu
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Song Hu
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shujuan Shi
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Wenjing Feng
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yongjun Mao
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China.
| |
Collapse
|
3
|
Zhang A, Cao Z, Zhao L, Zhang Q, Fu L, Li J, Liu T. Characterization of bifunctional alginate lyase Aly644 and antimicrobial activity of enzymatic hydrolysates. Appl Microbiol Biotechnol 2023; 107:6845-6857. [PMID: 37698609 DOI: 10.1007/s00253-023-12745-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 05/17/2023] [Revised: 08/02/2023] [Accepted: 08/11/2023] [Indexed: 09/13/2023]
Abstract
An alginate lyase gene aly644 encoding a member of polysaccharide lyase family 6 was obtained from a metagenome of Antarctic macroalgae-associated microbes. The gene was expressed heterologously in Escherichia coli, and the recombinant protein was purified using a Ni-NTA His Tag Kit. With sodium alginate as the substrate, recombinant Aly644 exhibited an optimum reaction temperature of 50°C and an optimum reaction pH of 7.0. The Vmax and Km values of Aly644 toward sodium alginate were 112.36 mg/mL·min and 16.75 mg/mL, respectively. Substrate specificity analysis showed that Aly644 was a bifunctional alginate lyase that hydrolyzed both polyguluronic acid and polymannuronic acid. The hydrolysis products of Aly644 with sodium alginate as the substrate were detected by thin-layer chromatography, and were mainly di- and trisaccharides. The oligosaccharides produced by degradation of sodium alginate by Aly644 inhibited the mycelial growth of the plant pathogens Phytophthora capsici and Fulvia fulva; the 50% maximal effective concentration (EC50) values were 297.45 and 452.89 mg/L, and the 90% maximal effective concentration (EC90) values were 1341.45 and 2693.83 mg/L, respectively. This highlights that Aly644 is a potential candidate enzyme for the industrial production of alginate oligosaccharides with low degree of polymerization. Enzyme-hydrolyzed alginate oligosaccharides could support the development of green agriculture as natural antimicrobial agents. KEY POINTS: • An alginate lyase was obtained from a metagenome of Antarctic macroalgae-associated microbes. • Aly644 is a bifunctional alginate lyase with excellent thermostability and pH stability. • The enzymatic hydrolysates of Aly644 directly inhibited Phytophthora capsici and Fulvia fulva.
Collapse
Affiliation(s)
- Ao Zhang
- Department of Pharmaceutical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Zhe Cao
- Key Lab of Ecological Environment Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China
| | - Luying Zhao
- Key Lab of Ecological Environment Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China
| | - Qian Zhang
- Key Lab of Ecological Environment Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China
| | - Liping Fu
- Key Lab of Ecological Environment Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China
| | - Jiang Li
- Key Lab of Ecological Environment Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China.
| | - Tao Liu
- Department of Pharmaceutical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| |
Collapse
|
4
|
Bai N, Deng W, Qi Z, Pan S, Li Q, Gu M. The effect of alginate oligosaccharides on intestine barrier function and Vibrio parahaemolyticus infections in the white shrimp Litopenaeus vannamei. Fish Shellfish Immunol 2023; 141:109011. [PMID: 37604263 DOI: 10.1016/j.fsi.2023.109011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/14/2023] [Accepted: 08/17/2023] [Indexed: 08/23/2023]
Abstract
The intestine is a host-pathogen interaction site and improved intestinal barrier function help to prevent disease in shrimp. Alginate oligosaccharides (AOS) are derived from resourceful brown algae. The intestine protection properties of AOS were widely recognized, and their benefits in fish have been reported. Nevertheless, there are no reports on AOS in shrimp and other crustaceans. In the present work, we measured the effects of AOS on growth performance and disease resistance in the white shrimp Litopenaeus vannamei and investigated their effects on intestinal health. Shrimps with an initial weight of about 2 g were fed with diets supplemented with 0 (control), 0.07%, 0.2%, 0.6%, or 1.2% of AOS for 56 days and were sampled and challenged with Vibrio parahaemolyticus. Dietary AOS did not significantly influence weight gain or feed utilization (P > 0.05). However, AOS considerably decreased the seven-day cumulative mortality after the challenge at any dose (P < 0.05). Dietary AOS improved the intestinal structure, significantly boosted the intestinal villus height at 0.6% and 1.2% levels, and increased intestinal wall thickness by 0.2%, 0.6%, and 1.2%. The alkaline phosphatase and maltase activities were also increased, suggesting that AOS improved the intestinal condition. Redox homeostasis in intestinal was improved by AOS, as expressed by the enhanced total antioxidant capacity and decreased malonaldehyde content, partly due to the increased superoxide dismutase and catalase activities. Compared with the antioxidant system, AOS's stimulating effects on immunity were more significant. At any level, AOS significantly activated lysozyme activity, the expression of propo and two antimicrobial peptide genes (pen-3 and crusin). However, the lowest concentration of AOS did not stimulate the gene expression of all three assayed pattern recognition receptors (LGBP, Toll, and IMD), and only the highest concentration of AOS increased the expression of imd. These findings suggest that AOS are highly efficient immunostimulants, and various immune pathways in shrimp are differentially sensitive to AOS. Finally, our findings suggest that AOS significantly alter the gut microbiota and their relative abundance at the phylum, family, and genus levels. In conclusion, AOS significantly enhances disease resistance in L. vannamei, possibly attributed to improved intestinal development, increased intestinal immunity and altered microbiota. These findings could provide a basis for future studies on the practical use of AOS and its mechanisms of action.
Collapse
Affiliation(s)
- Nan Bai
- Marine College, Shandong University, Weihai, Shandong, China; Key Laboratory of Modern Marine Ranching Technology of Weihai, Weihai, Shandong, China
| | - Wanzhen Deng
- Marine College, Shandong University, Weihai, Shandong, China; Key Laboratory of Modern Marine Ranching Technology of Weihai, Weihai, Shandong, China
| | - Zezheng Qi
- Marine College, Shandong University, Weihai, Shandong, China; Key Laboratory of Modern Marine Ranching Technology of Weihai, Weihai, Shandong, China
| | - Shihui Pan
- Marine College, Shandong University, Weihai, Shandong, China; Key Laboratory of Modern Marine Ranching Technology of Weihai, Weihai, Shandong, China
| | - Qing Li
- Marine College, Shandong University, Weihai, Shandong, China; Key Laboratory of Modern Marine Ranching Technology of Weihai, Weihai, Shandong, China
| | - Min Gu
- Marine College, Shandong University, Weihai, Shandong, China; Key Laboratory of Modern Marine Ranching Technology of Weihai, Weihai, Shandong, China.
| |
Collapse
|
5
|
Wang Y, Xu P, Wang W, Jia X, Zhu L, Yin H. Oligosaccharides increased both leaf biomass and steviol glycosides content of Stevia rebaudiana. Plant Physiol Biochem 2023; 202:107937. [PMID: 37566994 DOI: 10.1016/j.plaphy.2023.107937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 07/08/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023]
Abstract
Steviol glycosides (SGs) are a variety of important natural sweeteners. They are 200-350 times sweeter than sucrose without calories. Currently, their production is still mainly dependent on extraction from Stevia rebaudiana Bertoni (stevia). Oligosaccharides are environmentally friendly elicitors that promote plant growth and accumulation of secondary metabolites. In the present study, different concentrations of chitosan oligosaccharides (COS) and alginate oligosaccharides (AOS) were applied to stevia to explore their effect on growth and SGs biosynthesis. It was found that both COS and AOS promoted biomass production by increasing the leaf number and photosynthetic efficiency, which may be related to the decreased content of abscisic acid. The content of SGs was significantly increased after 50 mg/L AOS treatment, which not only increased the contents of stevioside (STV) and rebaudioside A (Reb A) significantly, but some important minority glucosides, like Reb E, Reb D, and Reb M. The increased SGs contents were the combined effect of the higher expression of SGs biosynthesis related genes, including KAH, UGT74G1, UGT85C2, and UGT91D2. The geometry changes of stem induced by COS and AOS may help to increase the lodging resistance of stevia. Thus, COS and AOS can be used in the field planting of stevia to increase the yield of SGs for industrial purposes.
Collapse
Affiliation(s)
- Yu Wang
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Peiyu Xu
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Wenxia Wang
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Xiaochen Jia
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Liping Zhu
- Zhucheng Haotian Pharm Co., Ltd, Shandong, 262200, China; Dongtai Hirye Biotechnology Co., Ltd, Jiangsu, 224200, China
| | - Heng Yin
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| |
Collapse
|
6
|
Wang Y, Ren K, Tan J, Mao Y. Alginate oligosaccharide alleviates aging-related intestinal mucosal barrier dysfunction by blocking FGF1-mediated TLR4/NF-κB p65 pathway. Phytomedicine 2023; 116:154806. [PMID: 37236046 DOI: 10.1016/j.phymed.2023.154806] [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: 12/24/2022] [Revised: 03/30/2023] [Accepted: 04/04/2023] [Indexed: 05/28/2023]
Abstract
BACKGROUND Alginate oligosaccharide (AOS) has been reported to exert a crucial role in maintaining the intestinal mucosal barrier (IMB) function. The current study aimed at ascertaining the protective effects of AOS on aging-induced IMB dysfunction and to elucidate the underlying molecular mechanisms. METHODS An aging mouse model and a senescent NCM460 cell model were established using d-galactose. AOS was administered to aging mice and senescent cells, and IMB permeability, inflammatory response and tight junction proteins were assessed. In silico analysis was conducted to identify factors regulated by AOS. Using gain- and loss-of-function approaches, we evaluated the roles of FGF1, TLR4 and NF-κB p65 in the aging-induced IMB dysfunction and NCM460 cell senescence. RESULTS AOS protected the IMB function of aging mice and NCM460 cells by reducing permeability and increasing tight junction proteins. In addition, AOS up-regulated FGF1, which blocked the TLR4/NF-κB p65 pathway, and identified as the mechanism responsible for the protective effect of AOS. CONCLUSION AOS blocks the TLR4/NF-κB p65 pathway via inducing FGF1, ultimately reducing the risk of IMB dysfunction in aging mice. This study highlights the potential of AOS as a protective agent against aging-induced IMB disorder and provides insight into the underlying molecular mechanisms.
Collapse
Affiliation(s)
- Yanting Wang
- Department of Gastroenterology, The Affiliated Hospital of Qingdao University, No.16 Jiangsu Road, Qingdao, Shandong 266000, China
| | - Keyu Ren
- Department of Gastroenterology, The Affiliated Hospital of Qingdao University, No.16 Jiangsu Road, Qingdao, Shandong 266000, China
| | - Junying Tan
- Department of Gastroenterology, The Affiliated Hospital of Qingdao University, No.16 Jiangsu Road, Qingdao, Shandong 266000, China
| | - Yongjun Mao
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao 266000, China.
| |
Collapse
|
7
|
Li F, Tang Y, Wei L, Yang M, Lu Z, Shi F, Zhan F, Li Y, Liao W, Lin L, Qin Z. Alginate oligosaccharide modulates immune response, fat metabolism, and the gut bacterial community in grass carp (Ctenopharyngodon idellus). Fish Shellfish Immunol 2022; 130:103-113. [PMID: 36044935 DOI: 10.1016/j.fsi.2022.08.067] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/23/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Alginate oligosaccharide (AOS) is widely used in agriculture because of its many excellent biological properties. However, the possible beneficial effects of AOS and their underlying mechanisms are currently not well known in grass carp (Ctenopharyngodon idellus). Here, grass carp were fed diets supplemented with 5, 10, or 20 g/kg AOS for six weeks. HE and PAS staining showed that the diets of AOS significantly increased the number of goblet cells in the intestinal. According to transcriptome and quantitative real-time PCR (qRT-PCR) data, AOS-supplemented diets activated the expression of fat metabolism-related pathways and genes. The 16S rRNA sequencing results showed that supplementation with AOS affected the distribution and abundance of the gut bacterial assembly. qRT-PCR and activity assays revealed that the AOS diets significantly increased the antioxidant resistance in gut of grass carp, and down-regulated the expression of inflammatory and up-regulated anti-inflammatory cytokines. Finally, the Aeromonas hydrophila infection assay suggested that the mortality in the groups fed dietary AOS was slightly lower than that in the control. Therefore, supplementing the diet of grass carp with an appropriate amount of AOS can improve fat metabolism and immune responses and alter the intestinal bacterial community, which may help to fight bacterial infection.
Collapse
Affiliation(s)
- Fenglin Li
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China
| | - Ying Tang
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China
| | - Lixiang Wei
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China
| | - Minxuan Yang
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China
| | - Zhijie Lu
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China
| | - Fei Shi
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China
| | - Fanbin Zhan
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China
| | - Yanan Li
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China
| | - Wenchong Liao
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Li Lin
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, 524025, China.
| | - Zhendong Qin
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong Province, 510222, China.
| |
Collapse
|
8
|
Wang S, Feng W, Liu J, Wang X, Zhong L, Lv C, Feng M, An N, Mao Y. Alginate oligosaccharide alleviates senile osteoporosis via the RANKL-RANK pathway in D-galactose-induced C57BL/6J mice. Chem Biol Drug Des 2021; 99:46-55. [PMID: 34145772 PMCID: PMC9544009 DOI: 10.1111/cbdd.13904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 06/06/2021] [Indexed: 11/30/2022]
Abstract
Osteoporosis is a systemic skeletal disorder characterized by reduced bone mineral density (BMD) and bone quality and increased bone porosity, which increase the risk of bone fracture. Inflammation, one of the important mechanisms related to aging, is associated with osteoporosis. Treatment with anti‐inflammatory agents is effective for alleviating senile osteoporosis. Alginate oligosaccharide (AOS) can prevent and treat diseases related to inflammation, oxidative stress, and immunity. This study evaluates the effect of AOS on osteoporosis and investigates the underlying mechanism. Osteoporosis model was induced by D‐galactose (D‐gal) (200 mg kg−1 day−1) for eight weeks. Three groups were administered via AOS (50, 100, and 150 mg kg−1 day−1) for four weeks, while a control group received sterile water (5 ml kg−1 day−1) for 8 weeks. The results showed that AOS improved bone density and bone microstructure in D‐gal‐induced osteoporosis mice. AOS inhibited osteoclast proliferation, probably through the suppression of receptor activator of nuclear factor‐kappa B ligand (RANKL)‐associated nuclear factor kappa B (NF‐κB) and c‐Fos signaling pathway. AOS also increased osteoprotegerin (OPG) expression and competitively inhibited the binding between RANK and RANKL in senile osteoporosis. Further, AOS decreased the secretion of serum osteocalcin and reduced bone conversion. Together, these results demonstrate the anti‐osteoporosis activity of AOS in mice with osteoporosis.
Collapse
Affiliation(s)
- Shan Wang
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Wenjing Feng
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China.,Department of Epidemiology and Health Statistics, The School of Public Health of Qingdao University, Qingdao, 266021, China
| | - Jianya Liu
- Department of General Practice, Anyang District Hospital of Puyang City, Anyang, 455000, China
| | - Xufu Wang
- Department of Nuclear medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Lina Zhong
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Chengxiu Lv
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Meiping Feng
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Nina An
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Yongjun Mao
- Department of Geriatric Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| |
Collapse
|
9
|
Wan J, Zhang J, Xu Q, Yin H, Chen D, Yu B, He J. Alginate oligosaccharide protects against enterotoxigenic Escherichia coli-induced porcine intestinal barrier injury. Carbohydr Polym 2021; 270:118316. [PMID: 34364589 DOI: 10.1016/j.carbpol.2021.118316] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 05/27/2021] [Accepted: 06/05/2021] [Indexed: 12/13/2022]
Abstract
Alginate oligosaccharide (AOS) possesses various pharmaceutical benefits, making it an attractive candidate for biomedical applications. In the present study, we prepared AOS by depolymerising alginate; its degree of polymerisation mainly ranged from 2 to 8. We confirmed the enteroprotective potential of AOS against enterotoxigenic Escherichia coli (ETEC)-induced intestinal barrier injury in weaned pigs. Next, we illustrated the mechanisms underlying this effect of AOS using the porcine small intestinal epithelial cell line IPEC-J2. AOS potently reduced the binding of the bacteria-deprived endotoxin lipopolysaccharide (LPS) to the IPEC-J2 cell surface. Moreover, it suppressed the LPS-induced production of pro-inflammatory cytokines and the nuclear translocation of nuclear factor-κB (NF-κB) p65 in IPEC-J2 cells. These results indicate that AOS protects the intestinal epithelium from ETEC-induced inflammatory injury by preventing the activation of NF-κB, implying that AOS could be used as an anti-inflammatory agent for treating inflammation-related intestinal diseases in mammals.
Collapse
Affiliation(s)
- Jin Wan
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, Sichuan, People's Republic of China.
| | - Jiao Zhang
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, Sichuan, People's Republic of China.
| | - Qingsong Xu
- College of Life Science, Dalian Minzu University, Dalian 116600, Liaoning, People's Republic of China.
| | - Heng Yin
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, People's Republic of China.
| | - Daiwen Chen
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, Sichuan, People's Republic of China.
| | - Bing Yu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, Sichuan, People's Republic of China.
| | - Jun He
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, Sichuan, People's Republic of China.
| |
Collapse
|
10
|
Sun C, Zhou J, Duan G, Yu X. Hydrolyzing Laminaria japonica with a combination of microbial alginate lyase and cellulase. Bioresour Technol 2020; 311:123548. [PMID: 32454421 DOI: 10.1016/j.biortech.2020.123548] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/13/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
A novel seaweed-hydrolyzing strain designated as Pseudoalteromonas sp. Alg6B was isolated from the surface of brown seaweed (Laminaria japonica). The activity of crude alginate lyase produced by Alg6B was 54.5 U/ml and the main products of hydrolyzing alginate were disaccharide and tetrasaccharide. The hydrolysis rate of seaweed reached up to 97% after combining 3% (v/v) Alg6B and 0.2% (w/v) solid cellulase. In kelp hydrolysate, the contents of nutrients are much more than raw seaweed. Alg6B grows quickly and has the ability of producing alginate oligosaccharides with low molecular weight (MW) (≤2 kDa). Furthermore, this study demonstrates that a combination of microbial alginate lyase and cellulase could almost hydrolyze seaweed completely. This research indicated that Alg6B could provide a feasible pathway to produce alginate oligosaccharides (AOS), and the synergistic effect of alginate lyase and cellulase on seaweed bioconversion can potentially pave the way to the sustainable production of seaweed fertilizer.
Collapse
Affiliation(s)
- Chixiang Sun
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi 214122, China
| | - Jianli Zhou
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi 214122, China; School of Food and Drug Manufacturing Engineering, Guizhou Institute of Technology, 1 Caiguan Road, Guiyang 550003, China
| | - Guoliang Duan
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi 214122, China
| | - Xiaobin Yu
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi 214122, China.
| |
Collapse
|
11
|
Zhang C, Wang W, Zhao X, Wang H, Yin H. Preparation of alginate oligosaccharides and their biological activities in plants: A review. Carbohydr Res 2020; 494:108056. [PMID: 32559511 DOI: 10.1016/j.carres.2020.108056] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 05/31/2020] [Accepted: 05/31/2020] [Indexed: 12/11/2022]
Abstract
Alginate oligosaccharide (AOS) is the degradation product of alginates extracted from brown algae. As a multifunctional oligomer, it has attracted widespread attention in plant research. Different methods of preparation generate AOS possessing diverse structural properties, and result in differences in AOS activity. In this review, the methods of preparation and characterization of AOS are briefly summarized, followed by a systematic introduction to the activity and mechanisms of AOS in plants. AOS can act as a growth promoter at different growth stages of plants. AOS also enhances resistance to pathogens, drought, salt, heavy metals and other stressors by triggering plant immunity, exerting bioactivity just like a pathogen-associated molecular pattern. In addition, AOS can regulate ABA biosynthesis and metabolite to preserve fruit quality and enhance shelf life. This review provides a comprehensive summary of the biological activity of AOS in plants, which will support research and the application of AOS treatments for plants in the future.
Collapse
Affiliation(s)
- Chunguang Zhang
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China; Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Wenxia Wang
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Xiaoming Zhao
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Hongying Wang
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China.
| | - Heng Yin
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
| |
Collapse
|
12
|
Bose SK, He Y, Howlader P, Wang W, Yin H. The N-glycan processing enzymes β-D-N-acetylhexosaminidase are involved in ripening-associated softening in strawberry fruit. J Food Sci Technol 2020; 58:621-631. [PMID: 33568856 DOI: 10.1007/s13197-020-04576-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/03/2020] [Accepted: 06/12/2020] [Indexed: 01/02/2023]
Abstract
Excessive softening of fruits during the ripening process leads to rapid deterioration. N-glycan processing enzymes are reported to play important roles during fruit ripening associated softening. Efforts have been made to identify and purify β-D-N-acetyl hexosaminidase (β-Hex) from strawberry fruit and also to investigate its function during ripening. More than that, the postharvest treatment effect of alginate oligosaccharides (AOS) at a concentration of 0.1 g L-1 on fruit firmness and the activity of N-glycan processing enzymes were also investigated during the storage of strawberry. Results demonstrated that the full-length of β-Hex 1 and β-Hex 2 genes were 2186 and 2013 bp, including an ORF of 1598 and 1724 bp and encoding 532 and 574 amino acids with a predicted molecular weight of 60 and 71 kDa, respectively. Moreover, β-hex enzyme activity and the expression of their encoding genes increased during the ripening of strawberry. In addition, postharvest application of AOS delayed the loss of firmness and suppressed the activity of N-glycan processing enzymes (α-Man and β-Hex) along with N-glycan processing enzymes associated genes expression resulting in delayed fruit softening. Therefore, our study suggests that N-glycan processing enzymes may play roles in strawberry softening and AOS treatment suppressed enzymes activity and preserve firmness of the fruit.
Collapse
Affiliation(s)
- Santosh Kumar Bose
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China.,University of Chinese Academy of Sciences, Beijing, 100049 China.,Department of Horticulture, Patuakhali Science and Technology University, Patuakhali, Bangladesh
| | - Yanqiu He
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Prianka Howlader
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China.,University of Chinese Academy of Sciences, Beijing, 100049 China.,Department of Horticulture, Patuakhali Science and Technology University, Patuakhali, Bangladesh
| | - Wenxia Wang
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China.,Natural Products and Glyco-Biotechnology Lab, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road, Dalian, China
| | - Heng Yin
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China.,University of Chinese Academy of Sciences, Beijing, 100049 China.,Natural Products and Glyco-Biotechnology Lab, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road, Dalian, China
| |
Collapse
|
13
|
Zhang C, Howlader P, Liu T, Sun X, Jia X, Zhao X, Shen P, Qin Y, Wang W, Yin H. Alginate Oligosaccharide (AOS) induced resistance to Pst DC3000 via salicylic acid-mediated signaling pathway in Arabidopsis thaliana. Carbohydr Polym 2019; 225:115221. [PMID: 31521273 DOI: 10.1016/j.carbpol.2019.115221] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/07/2019] [Accepted: 08/19/2019] [Indexed: 12/22/2022]
Abstract
Alginate Oligosaccharide (AOS) is a natural biological carbohydrate extracted from seaweed. In our study, Arabidopsis thaliana was used to evaluate the AOS-induced resistance to Pseudomonas syringae pv. tomato DC3000 (Pst DC3000). Resistance was vitally enhanced at 25 mg/L in wild type (WT), showing the decreased disease index and bacteria colonies, burst of ROS and NO, high transcription expression of resistance genes PR1 and increased content of salicylic acid (SA). In SA deficient mutant (sid2), AOS-induced disease resistance dropped obviously compared to WT. The disease index was significantly higher than WT and the expression of recA and avrPtoB are two and four times lower than WT, implying that AOS induces disease resistance injecting Pst DC3000 after three days treatment by arousing the SA pathway. Our results provide a reference for the profound research and application of AOS in agriculture.
Collapse
Affiliation(s)
- Chunguang Zhang
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Prianka Howlader
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tongmei Liu
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; College of Food Science and Engineering, Dalian Ocean University, Dalian 116023, China
| | - Xue Sun
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xiaochen Jia
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xiaoming Zhao
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Peili Shen
- Ministry of Agriculture Key Laboratory of Seaweed Fertilizers, Qingdao Brightmoon Seaweed Group Co Ltd., Qingdao, China
| | - Yimin Qin
- Ministry of Agriculture Key Laboratory of Seaweed Fertilizers, Qingdao Brightmoon Seaweed Group Co Ltd., Qingdao, China
| | - Wenxia Wang
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Heng Yin
- Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| |
Collapse
|
14
|
Wan J, Zhang J, Chen D, Yu B, Mao X, Zheng P, Yu J, Luo J, He J. Alginate oligosaccharide-induced intestinal morphology, barrier function and epithelium apoptosis modifications have beneficial effects on the growth performance of weaned pigs. J Anim Sci Biotechnol 2018; 9:58. [PMID: 30128148 PMCID: PMC6094457 DOI: 10.1186/s40104-018-0273-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [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: 01/21/2018] [Accepted: 06/06/2018] [Indexed: 01/18/2023] Open
Abstract
Background Alginate oligosaccharide (AOS), produced from alginate by alginate lyase-mediated depolymerisation, is a potential substitute for antibiotics and possesses growth-enhancing effects. Nevertheless, the mechanisms by which AOS regulates porcine growth remain to be elucidated. Therefore, we investigated the AOS-mediated changes in the growth performance of weaned pigs by determining the intestinal morphology, barrier function, as well as epithelium apoptosis. Methods Twenty-four weaned pigs were distributed into two groups (n = 12) and received either a basal diet (control group) or the same diet supplemented with 100 mg/kg AOS. On d 15, D-xylose (0.1 g/kg body weight) was orally administrated to eight randomly selected pigs per treatment, and their serum and intestinal mucosa samples were collected 1 h later. Results Our results showed that inclusion of AOS in the diet for 2 wk increased (P < 0.05) the average daily body weight gain in weaned pigs. Notably, AOS supplementation ameliorated the intestinal morphology and barrier function, as suggested by the enhanced (P < 0.05) intestinal villus height, secretory immunoglobulin A content and goblet cell counts. Compared to the control group, AOS ingestion both decreased (P < 0.05) the total apoptotic percentage and increased (P < 0.05) the proportion of S phase in the intestinal epithelial cells. Furthermore, AOS not only up-regulated (P < 0.05) the B-cell lymphoma-2 (BCL2) transcriptional level but also down-regulated (P < 0.05) the B-cell lymphoma-2-associated X protein (BAX), cysteinyl aspartate-specific proteinase-3 (caspase-3) and caspase-9 transcriptional levels in the small intestine. Conclusions In summary, this study provides evidence that supplemental AOS beneficially affects the growth performance of weaned pigs, which may result from the improved intestinal morphology and barrier function, as well as the inhibited enterocyte death, through reducing apoptosis via mitochondria-dependent apoptosis.
Collapse
Affiliation(s)
- Jin Wan
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| | - Jiao Zhang
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| | - Daiwen Chen
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| | - Bing Yu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| | - Xiangbing Mao
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| | - Ping Zheng
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| | - Jie Yu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| | - Junqiu Luo
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| | - Jun He
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan People's Republic of China
| |
Collapse
|