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Noda M, Noguchi S, Danshiitsoodol N, Hara T, Sugiyama M. Non-pathogenic Heyndrickxia coagulans (Bacillus coagulans) 29-2E inhibits the virulence of pathogenic Salmonella Typhimurium by quorum-sensing regulation. J Biosci Bioeng 2024; 137:445-452. [PMID: 38553372 DOI: 10.1016/j.jbiosc.2024.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/19/2024] [Accepted: 03/07/2024] [Indexed: 05/20/2024]
Abstract
Bacteria produce and release small signal molecules, autoinducers, as an indicator of their cell density. The system, called a quorum-sensing (QS) system, is used to control not only virulence factors but also antibiotic production, sporulation, competence, and biofilm formation in bacteria. Different from antibiotics, QS inhibitors are expected to specifically repress the virulence factors in pathogenic bacteria without inhibiting growth or bactericidal effects. Therefore, since QS inhibitors have little risk of antibiotic-resistant bacteria emergence, they have been proposed as promising anti-bacterial agents. In the present study, we aimed to find new QS inhibitors that prohibit the signaling cascade of autoinducer 3 (AI-3) recognized by a QseCB two-component system that regulates some virulence factors of pathogens, such as enterohemorrhagic Escherichia coli (EHEC) and Salmonella enterica subsp. enterica serovar Typhimurium. We have established the method for QS-inhibitor screening using a newly constructed plasmid pLES-AQSA. E. coli DH5α transformed with the pLES-AQSA can produce β-galactosidase that converts 5-bromo-4-chloro-3-indolyl β-d-galactopyranoside (X-gal) into blue pigment (5-bromo-4-chloro-indoxyl) under the control of the QseCB system. By screening, Heyndrickxia coagulans (formerly Bacillus coagulans) 29-2E was found to produce an exopolysaccharide (EPS)-like water-soluble polymer that prohibits QseCB-mediated β-galactosidase production without antibacterial activities. Further, the simultaneous injection of the 29-2E strain significantly improves the survival rate of Salmonella Typhimurium-infected silkworm larvae (from 0% to 83.3%), suggesting that the substance may be a promising inhibitor against the virulence of pathogens without risk of the emergence of antibiotic-resistant bacteria.
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Affiliation(s)
- Masafumi Noda
- Department of Probiotic Science for Preventive Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
| | - Shino Noguchi
- Department of Pharmaceutical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan
| | - Narandalai Danshiitsoodol
- Department of Probiotic Science for Preventive Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
| | - Toshinori Hara
- Section of Clinical Laboratory, Division of Clinical Support, Hiroshima University Hospital, Kasumi 1-2-3 Minami-ku, Hiroshima 734-8551, Japan
| | - Masanori Sugiyama
- Department of Probiotic Science for Preventive Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan.
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Potential Applications of an Exopolysaccharide Produced by Bacillus xiamenensis RT6 Isolated from an Acidic Environment. Polymers (Basel) 2022; 14:polym14183918. [PMID: 36146061 PMCID: PMC9505781 DOI: 10.3390/polym14183918] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/09/2022] [Accepted: 09/15/2022] [Indexed: 11/17/2022] Open
Abstract
The Bacillus xiamenensis RT6 strain was isolated and identified by morphological, biochemical and molecular tests from an extreme acidic environment, Rio Tinto (Huelva). Optimisation tests for exopolysaccharide (EPS) production in different culture media determined that the best medium was a minimal medium with glucose as the only carbon source. The exopolymer (EPSt) produced by the strain was isolated and characterised using different techniques (GC-MS, HPLC/MSMS, ATR-FTIR, TGA, DSC). The molecular weight of EPSt was estimated. The results showed that the average molecular weight of EPSt was approximately 2.71 × 104 Da and was made up of a heteropolysaccharide composed of glucose (60%), mannose (20%) and galactose (20%). The EPSt showed antioxidant capabilities that significantly improved cell viability. Metal chelation determined that EPSt could reduce the concentration of transition metals such as iron at the highest concentrations tested. Finally, the emulsification study showed that EPSt was able to emulsify different natural polysaccharide oils, reaching up to an 80% efficiency (olive and sesame oil), and was a good candidate for the substitution of the most polluting emulsifiers. The EPSt was found to be suitable for pharmaceutical and industrial applications.
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Sun T, Miao H, Zhang C, Wang Y, Liu S, Jiao P, Li W, Li Y, Huang Z. Effect of dietary Bacillus coagulans on the performance and intestinal microbiota of weaned piglets. Animal 2022; 16:100561. [PMID: 35716416 DOI: 10.1016/j.animal.2022.100561] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 05/13/2022] [Accepted: 05/16/2022] [Indexed: 11/25/2022] Open
Abstract
The performance of weaned piglets suffers from severe limitations resulting from diarrhoea. Therefore, this trial was performed to investigate the effects of Bacillus coagulans as an alternative to antibiotics on piglet growth performance and intestinal health. Ninety (initial BW = 7.70 ± 0.17 kg, weaning age of 26 days) healthy weaned piglets with similar BWs were selected and randomised into three treatment groups. Pigs in the negative control (NC) group were fed a basal diet, pigs in the positive control (PC) group were fed the basal diet plus antibiotics, and pigs in the test group (BC) were fed the basal diet plus Bacillus coagulans at 600 g/t; the trial lasted for 28 days. The results showed that the ratios of feed to gain (F:G) of both the BC and PC groups from 1 to 21 days were significantly lower (P < 0.05), and the average daily weight gain (ADG) of the BC group from 22 to 28 days was significantly higher (P < 0.05) than that of the NC group in terms of growth performance. The diarrhoea index was lowest in the PC group, followed by the BC group, and highest in the NC group. The BC group had a lower diarrhoea index at the later stage. We performed 16S rRNA sequencing to measure the intestinal bacteria and found that the BC group had a higher intestinal bacteria diversity than the NC and PC groups (P < 0.05). From days 1 to 21, the main differential species were Ruminococcaceae_UCG-014 and Faecalibacterium (P < 0.05); from days 22 to 28, the main differential species were Prevotella_9, unclassified_f__Lachnospiraceae, Anaerovibrio, and Ruminococcaceae_UCG-002 (P < 0.05). The correlation analysis between growth performance and species revealed specific gut microorganisms responsible for variation in F:G, ADG, and diarrhoea index, such as Prevotellaceae, Clostridium_sensu_stricto_1, Ruminococcaceae, Phascolarctobacterium, and Anaerovibrio. In conclusion, Bacillus coagulans changed the microbial composition in the faeces of weaned piglets, which had positive effects on growth performance and the diarrhoea index. Therefore, our study provided new insight into the future application of Bacillus coagulans as an additive.
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Affiliation(s)
- Tiehu Sun
- COFCO Nutrition and Health Research Institute, Beijing 102209, China
| | - Huabiao Miao
- School of Life Science, Yunnan Normal University, Kunming 650500, China
| | - Chengbo Zhang
- School of Life Science, Yunnan Normal University, Kunming 650500, China
| | - Yongsheng Wang
- COFCO Nutrition and Health Research Institute, Beijing 102209, China
| | - Shuai Liu
- New Hope Liuhe Group Co., Ltd., Qingdao 266000, China
| | - Peng Jiao
- COFCO Feed Co., Ltd., Beijing 10020, China
| | - Wei Li
- COFCO Feed Co., Ltd., Beijing 10020, China
| | - Yong Li
- COFCO Feed Co., Ltd., Beijing 10020, China.
| | - Zunxi Huang
- School of Life Science, Yunnan Normal University, Kunming 650500, China
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Structural characterization and biological evaluation of a new O-acetyl-1,4-linked-β-d-mannan possessed potential application in hydrophilic polymer materials from Dendrobium devonianum. Int J Biol Macromol 2022; 213:328-338. [PMID: 35594938 DOI: 10.1016/j.ijbiomac.2022.05.098] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 05/05/2022] [Accepted: 05/12/2022] [Indexed: 01/17/2023]
Abstract
To explore the active polysaccharides from Dendrobium devonianum, a novel O-acetylmannan (DDP-1) with molecular weight of 117 kDa was isolated from D. devonianum. The chemical and instrumental analysis indicated that the DDP-1 was a homopolysaccharide containing a backbone chain composed of →4)-β-d-Manp-(1 → (71.4%) residue with internal →4)-2-O-acetyl-β-d-Manp-(1 → (14.2%), →4)-3-O-acetyl-β-d-Manp-(1 → (7.1%), and non-reducing end β-d-Manp-(1 → (7.3%) residues. Anticancer assay in vitro revealed that DDP-1 had anticancer activity against the growth of HepG2 and MCF-7 cancer cells. Moreover, cytokine secretion assays also presented that DDP-1 can promote cytokine production of TNF-α and IL-6 in THP-1 macrophage stimulated by PMA. Finally, the effects of isolation and purification on the microstructure of DDP-1 was studied by scanning electron microscope. The morphological features of DDP-1 indicated that DDP-1 hold high potential application in hydrophilic polymer materials.
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Selim S, Almuhayawi MS, Alharbi MT, Nagshabandi MK, Alanazi A, Warrad M, Hagagy N, Ghareeb A, Ali AS. In Vitro Assessment of Antistaphylococci, Antitumor, Immunological and Structural Characterization of Acidic Bioactive Exopolysaccharides from Marine Bacillus cereus Isolated from Saudi Arabia. Metabolites 2022; 12:metabo12020132. [PMID: 35208207 PMCID: PMC8874505 DOI: 10.3390/metabo12020132] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/22/2022] [Accepted: 01/27/2022] [Indexed: 02/01/2023] Open
Abstract
A strain of Bacillus cereus was isolated from the Saudi Red Sea coast and identified based on culture features, biochemical characteristics, and phylogenetic analysis of 16S rRNA sequences. EPSR3 was a major fraction of exopolysaccharides (EPS) containing no sulfate and had uronic acid (28.7%). The monosaccharide composition of these fractions is composed of glucose, galacturonic acid, and arabinose with a molar ratio of 2.0: 0.8: 1.0, respectively. EPSR3 was subjected to antioxidant, antitumor, and anti-inflammatory activities. The results revealed that the whole antioxidant activity was 90.4 ± 1.6% at 1500 µg/mL after 120 min. So, the IC50 value against DPPH radical found about 500 µg/mL after 60 min. While using H2O2, the scavenging activity was 75.1 ± 1.9% at 1500 µg/mL after 60 min. The IC50 value against H2O2 radical found about 1500 µg/mL after 15 min. EPSR3 anticytotoxic effect on the proliferation of (Bladder carcinoma cell line) (T-24), (human breast carcinoma cell line) (MCF-7), and (human prostate carcinoma cell line) (PC-3) cells. The calculated IC50 for cell line T-24 was 121 ± 4.1 µg/mL, while the IC50 for cell line MCF-7 was 55.7 ± 2.3 µg/mL, and PC-3 was 61.4 ± 2.6 µg/mL. Anti-inflammatory activity was determined for EPSR3 using different methods as Lipoxygenase (LOX) inhibitory assay gave IC50 12.9 ± 1.3 µg/mL. While cyclooxygenase (COX-2) inhibitory test showed 29.6 ± 0.89 µg /mL. EPSR3 showed potent inhibitory activity against methicillin-resistant Staphylococcus aureus (MRSA) and coagulase-negative staphylococci. The exposure times of EPSR3 for the complete inhibition of cell viability of methicillin resistant S. aureus was found to be 5% at 60 min. Membrane stabilization inhibitory gave 35.4 ± 0.67 µg/mL. EPSR3 has antitumor activity with a reasonable margin of safety. The antitumor activity of EPSR3 may be attributed to its content from uronic acids with potential for cellular antioxidant and anticancer functional properties.
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Affiliation(s)
- Samy Selim
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72341, Saudi Arabia;
- Correspondence: (S.S.); (A.S.A.)
| | - Mohammed S. Almuhayawi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.S.A.)
| | - Mohanned Talal Alharbi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, University of Jeddah, Jeddah 23218, Saudi Arabia; (M.T.A.); (M.K.N.)
| | - Mohammed K. Nagshabandi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, University of Jeddah, Jeddah 23218, Saudi Arabia; (M.T.A.); (M.K.N.)
| | - Awadh Alanazi
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72341, Saudi Arabia;
| | - Mona Warrad
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences at Al-Quriat, Jouf University, Al-Quriat 77454, Saudi Arabia;
| | - Nashwa Hagagy
- Department of Biology, College of Science and Arts at Khulis, University of Jeddah, Jeddah 21959, Saudi Arabia;
- Botany and Microbiology Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
| | - Ahmed Ghareeb
- Botany and Microbiology Department, Faculty of Science, Cairo University, Giza 12613, Egypt;
| | - Abdallah S. Ali
- Department of Microbiology, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
- Correspondence: (S.S.); (A.S.A.)
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Biofilm Matrix Formation in Human: Clinical Significance, Diagnostic Techniques, and Therapeutic Drugs. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2021. [DOI: 10.5812/archcid.107919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Context: Some recent reports have indicated that almost 80% of clinical infections in humans have biofilm origin and impose additional healthcare costs. This study was an updated review of extracellular polymeric substance matrix (Biofilm) formation in humans and elaborated on its clinical significance, diagnosis, and therapeutic approaches. Evidence Acquisition: This narrative study reviewed the most recent information on the significance of microbial biofilm formation in clinical settings, common biofilm-producing bacterial species, its diagnosis, antibiotic drug resistance, and new approaches to the treatment of infections associated with biofilm formation. Results: Evidence indicated a permanent increase in the frequency of microbial biofilm in the central venous catheter, mechanical heart valve, and urinary catheter, as well as persistent infections. However, antimicrobial resistance induced by biofilms formation and the antimicrobial treatment of biofilms were problematic. Moreover, several assays and lab devices were described to evaluate biofilm formation. Furthermore, new attitudes towards anti-biofilm treatments were introduced in this paper. Conclusions: The number of different mechanisms were in accordance with the recent knowledge on how biofilms play a critical role in the disease pathogenesis. Biofilm strikes the treatment and surveillance of patients bearing infectious diseases under different conditions. The use of new methods in anti-biofilm treatments is effective for the recovery of infected patients.
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Ghosh D, Karmakar P. Insight into anti-oxidative carbohydrate polymers from medicinal plants: Structure-activity relationships, mechanism of actions and interactions with bovine serum albumin. Int J Biol Macromol 2020; 166:1022-1034. [PMID: 33166557 DOI: 10.1016/j.ijbiomac.2020.10.258] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 01/06/2023]
Abstract
Recently, research associated with natural anti-oxidants leads to the chemical characterization of many compounds possessing strong anti-oxidant activity. Among these anti-oxidants, naturally occurring carbohydrate polymers containing pectic arabinogalactans esterified with phenolic acids in monomeric and dimeric forms are noteworthy. The presence of highly branched arabinogalactan type II side chains and sugar linked phenolic acid residues have been resolved as important parameters. The anti-oxidant activity of these compounds depend on their ability to convert free radicals into stable by-products and themselves oxidized to more stable and less reactive resonance stabilized radicals. Moreover, these carbohydrate polymers form water soluble stable complexes with protein. Such findings support their applications in a diversity of fields including food industry and pharmacy. This review highlights experimental evidences supporting that the carbohydrate polymers containing phenolic polysaccharides may become promising drug candidate for the prevention of aging and age related diseases.
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Affiliation(s)
- Debjani Ghosh
- Bhatar Girls' High School, Bhatar, Purba Bardhaman, West Bengal, India.
| | - Parnajyoti Karmakar
- Government General Degree College at Kalna-I, Medgachi, Muragacha, Purba Bardhaman, West Bengal, India
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Mohamed SS, Amer SK, Selim MS, Rifaat HM. Characterization and applications of exopolysaccharide produced by marine Bacillus altitudinis MSH2014 from Ras Mohamed, Sinai, Egypt. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.ejbas.2018.05.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Sahar S. Mohamed
- Microbial Biotechnology Department, Genetic Engineering and Biotechnology Research Division, National Research Centre, Cairo, Egypt
| | - Shaimaa K. Amer
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Manal S. Selim
- Microbial Biotechnology Department, Genetic Engineering and Biotechnology Research Division, National Research Centre, Cairo, Egypt
| | - Hala M. Rifaat
- Microbial Chemistry Department, Genetic Engineering and Biotechnology Research Division, National Research Centre, Cairo, Egypt
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Chatterjee S, Mukhopadhyay SK, Gauri SS, Dey S. Sphingobactan, a new α-mannan exopolysaccharide from Arctic Sphingobacterium sp. IITKGP-BTPF3 capable of biological response modification. Int Immunopharmacol 2018; 60:84-95. [DOI: 10.1016/j.intimp.2018.04.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 04/21/2018] [Accepted: 04/23/2018] [Indexed: 01/17/2023]
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Shanmugasundaram OL, Syed Zameer Ahmed K, Sujatha K, Ponnmurugan P, Srivastava A, Ramesh R, Sukumar R, Elanithi K. Fabrication and characterization of chicken feather keratin/polysaccharides blended polymer coated nonwoven dressing materials for wound healing applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:26-33. [PMID: 30184750 DOI: 10.1016/j.msec.2018.06.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 05/20/2018] [Accepted: 06/11/2018] [Indexed: 02/05/2023]
Abstract
In this research work, three kinds of nonwoven wound dressings were developed from chicken feather keratin (CFK-NW), keratin‑sodium alginate (CFK-SA-NW) and keratin-chitosan (CFK-CS-NW) and characterized using FTIR and SEM. The physical characteristics such as air permeability, thickness and areal density test results revealed the suitability of fabricated materials for wound dressing applications. CFK-SA-NW and CFK-CS-NW indicated a positive antibacterial effect against Gram's positive Staphylococcus aureus and Gram's negative Klebsiella pneumoniae and Escherichia coli bacteria with the zone of inhibition enhanced over >2.0 cm. Moreover, the biomedical potentials of dressing materials has been investigated by cell viability and cytotoxicity tests. Further, the wound healing ability was demonstrated using in vivo model (Albino Wistar rat). The fabricated materials exhibited good support for cell viability and a strong cytocompatibility. Furthermore, the hundred percent wound healing ability of CFK-CS-NW, CFK-SA-NW, CFK-NW and untreated control rats was observed at 15, 17, 21 and 23 days, respectively, Moreover, the wound healing potential of CFK-CS-NW and CFK-SA-NW was found to be better than that of CFK-NW and control group of rats. The outcome of the present study discloses the prospective applications of the developed materials as wound dressing biomaterial.
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Affiliation(s)
- O L Shanmugasundaram
- Department of Textile Technology, K.S.Rangasamy College of Technology, Tamil Nadu 637 215, India.
| | - K Syed Zameer Ahmed
- Department of Biotechnology, K.S.Rangasamy College of Technology, Tamil Nadu 637 215, India
| | - K Sujatha
- Department of Physics, Vellalar College for Women, Tamil Nadu 638 012, India
| | - P Ponnmurugan
- Department of Botany, Bharathiar University, Coimbatore, Tamil Nadu 641 046, India
| | - Amit Srivastava
- Department of Textile Technology, K.S.Rangasamy College of Technology, Tamil Nadu 637 215, India
| | - R Ramesh
- Department of Textile Technology, K.S.Rangasamy College of Technology, Tamil Nadu 637 215, India
| | - R Sukumar
- Department of Textile Technology, K.S.Rangasamy College of Technology, Tamil Nadu 637 215, India
| | - K Elanithi
- Department of Textile Technology, K.S.Rangasamy College of Technology, Tamil Nadu 637 215, India
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Bera K, Ray S, Raja W, Ray B. Structural insight of an antioxidative arabinogalactan protein of Aegle marmelos fruit gum and it’s interaction with β-lactoglobulin. Int J Biol Macromol 2017; 99:300-307. [DOI: 10.1016/j.ijbiomac.2017.02.068] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 02/09/2017] [Accepted: 02/17/2017] [Indexed: 11/15/2022]
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Majee SK, Bera K, Raja W, Ghosh K, Ray S, Ray B. Structural highlights of an antioxidative arabinogalactan protein of Lannea grandis gum that stabilizes β -lactoglobulin. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2016.06.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Effect of pH, glucoamylase, pullulanase and invertase addition on the degradation of residual sugar in L-lactic acid fermentation by Bacillus coagulans HL-5 with corn flour hydrolysate. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.01.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Zheng LP, Zou T, Ma YJ, Wang JW, Zhang YQ. Antioxidant and DNA Damage Protecting Activity of Exopolysaccharides from the Endophytic Bacterium Bacillus cereus SZ1. Molecules 2016; 21:E174. [PMID: 26861269 PMCID: PMC6273749 DOI: 10.3390/molecules21020174] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 01/25/2016] [Accepted: 01/27/2016] [Indexed: 12/19/2022] Open
Abstract
An endophytic bacterium was isolated from the Chinese medicinal plant Artemisia annua L. The phylogenetic and physiological characterization indicated that the isolate, strain SZ-1, was Bacillus cereus. The endophyte could produce an exopolysaccharide (EPS) at 46 mg/L. The 1,1-diphenyl-2-picrylhydracyl (DPPH) radical scavenging activity of the EPS reached more than 50% at 3-5 mg/mL. The EPS was also effective in scavenging superoxide radical in a concentration dependent fashion with an EC50 value of 2.6 mg/mL. The corresponding EC50 for scavenging hydroxyl radical was 3.1 mg/mL. Moreover, phenanthroline-copper complex-mediated chemiluminescent emission of DNA damage was both inhibited and delayed by EPS. The EPS at 0.7-1.7 mg/mL also protected supercoiled DNA strands in plasmid pBR322 against scission induced by Fenton-mediated hydroxyl radical. The preincubation of PC12 cells with the EPS prior to H₂O₂ exposure increased the cell survival and glutathione (GSH) level and catalase (CAT) activities, and decreased the level of malondialdehyde (MDA) and lactate dehydrogenase (LDH) activity in a dose-dependent manner, suggesting a pronounced protective effect against H₂O₂-induced cytotoxicity. Our study indicated that the EPS could be useful for preventing oxidative DNA damage and cellular oxidation in pharmaceutical and food industries.
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Affiliation(s)
- Li Ping Zheng
- Department of Horticulture, School of Architecture, Soochow University, Suzhou 215123, China.
| | - Tin Zou
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Yan Jun Ma
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China.
| | - Yu Qing Zhang
- School of Biology & Basic Medical Sciences, Soochow University, Suzhou 215123, China.
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Interaction with bovine serum albumin of an anti-oxidative pectic arabinogalactan from Andrographis paniculata. Carbohydr Polym 2014; 101:342-8. [DOI: 10.1016/j.carbpol.2013.09.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Revised: 09/08/2013] [Accepted: 09/10/2013] [Indexed: 01/24/2023]
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16
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In vitro evaluation of antioxidant defense mechanism and hemocompatibility of mauran. Carbohydr Polym 2013; 98:108-15. [DOI: 10.1016/j.carbpol.2013.04.050] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 04/03/2013] [Accepted: 04/12/2013] [Indexed: 11/19/2022]
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