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Liang S, Wang X, Li C, Liu L. Biological Activity of Lactic Acid Bacteria Exopolysaccharides and Their Applications in the Food and Pharmaceutical Industries. Foods 2024; 13:1621. [PMID: 38890849 PMCID: PMC11172363 DOI: 10.3390/foods13111621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 05/19/2024] [Accepted: 05/22/2024] [Indexed: 06/20/2024] Open
Abstract
Exopolysaccharides are natural macromolecular bioactive substances produced by lactic acid bacteria. With their unique physiological activity and structural characteristics, they are gradually showing broad application prospects in the food and pharmaceutical industries. Exopolysaccharides have various biological functions, such as exerting antioxidant and anti-tumor activities and regulating gut microbiota. Meanwhile, as a food additive, exopolysaccharides can significantly enhance the taste and quality of food, bringing consumers a better eating experience. In the field of medicine, exopolysaccharides have been widely used as drug carriers due to their non-toxic properties and good biocompatibility. This article summarizes the biological activities of exopolysaccharides produced by lactic acid bacteria, their synthesis, and their applications in food and pharmaceutical industries, aiming to promote further research and development in this field.
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Affiliation(s)
- Shengnan Liang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Xinyu Wang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Chun Li
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
- Heilongjiang Green Food Science Research Institute, Harbin 150028, China
| | - Libo Liu
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
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2
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Zang W, Cao H, Ge J, Zhao D. Structures, physical properties and antibacterial activity of silver nanoparticles of Lactiplantibacillus plantarum exopolysaccharide. Int J Biol Macromol 2024; 263:130083. [PMID: 38423905 DOI: 10.1016/j.ijbiomac.2024.130083] [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: 09/12/2023] [Revised: 01/25/2024] [Accepted: 02/08/2024] [Indexed: 03/02/2024]
Abstract
Lactic acid bacteria (LAB) exopolysaccharide (EPS) has good water absorption, high viscosity, good stability, so it was widely used in probiotics fields. In this study, EPS-producing LAB strain Lactiplantibacillus plantarum HDL-03 was isolated and identified. Moreover, the HDL-03 EPS was used as a stabilizer and mixed with AgNO3 to synthesize a novel nanoparticle AgNPs whose structure and properties were explored. The monosaccharide composition and molecular weight indicated that HDL-03 EPS was a heteropolysaccharide composed of mannose and glucose. Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR) spectroscopy analysis and methylation results jointly proved it was a heteropolysaccharide containing 1,3-Manp and 1,6-Glcp. The X-Ray diffraction (XRD) results showed that this EPS has an amorphous structure, while the synthesized AgNPs have crystalline properties. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results indicated EPS had a smooth and dense sheet structure, while the surface of AgNPs became rougher and large holes appeared after synthesis. Zeta particle size analysis suggested that the particle size of AgNPs increased by 36.63 nm compared to HDL-03 EPS. FT-IR analysis exhibited that the position of the characteristic peaks of AgNPs changed. The OH moving from a wavelength of 3388.49 cm-1 to a wavelength of 3316.79 cm-1 and telescopic vibration peak changed from 1356.07 cm-1 to 1344.22 cm-1. A plate inhibition test revealed the effect of different concentrations of EPS and AgNO3 synthesized AgNPs on the diameter of inhibition circle produced by the indicator bacteria Escherichia coli and Staphylococcus aureus. Furthermore, AgNPs were applied to the indicator bacteria, which the minimum inhibitory concentration (MIC), time-inhibitory curve, and changes in extracellular conductivity, nucleic acids, proteins, ATP, and lactate dehydrogenase (LDH) levels were determined. The AgNPs inhibited the growth of E. coli and S. aureus and exhibited outstanding antimicrobial properties. With the increase of treatment time, the degree of cell membrane damage increased, the permeability enhanced, and the intracellular substances leaked. These results indicate that HDL-03 EPS has good potential for applications in the production of food packaging, antimicrobials, catheters, textiles and coatings.
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Affiliation(s)
- Wenjing Zang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Huiying Cao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; Hebei University of Environmental Engineering, Hebei Key Laboratory of Agroecological Safety, Qinhuangdao 066102, China.
| | - Dan Zhao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; Hebei University of Environmental Engineering, Hebei Key Laboratory of Agroecological Safety, Qinhuangdao 066102, China.
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Zhang K, Tang H, Farid MS, Xiang F, Li B. Effect of Lactobacillus helveticus exopolysaccharides molecular weight on yogurt gel properties and its internal mechanism. Int J Biol Macromol 2024; 262:130006. [PMID: 38331067 DOI: 10.1016/j.ijbiomac.2024.130006] [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: 10/22/2023] [Revised: 02/04/2024] [Accepted: 02/04/2024] [Indexed: 02/10/2024]
Abstract
The processing characteristics of yogurt are closely related to the composition and arrangement of exopolysaccharides (EPS) in lactic acid bacteria (LAB). To fully understand and develop the functional properties of EPS and to study the effect of EPS molecular weight on yogurt and its mechanism, the physicochemical properties of high molecular weight EPS-LH43, medium molecular weight EPS-LH13, and low molecular weight EPS-LH23, as well as the gel properties and protein conformation of yogurt, were determined and analyzed in this experiment. The results indicate that EPS-LH43 and EPS-LH13 are both composed of mannose, rhamnose, galacturonic acid, glucose, and galactose. EPS-LH23 is composed of mannose, galacturonic acid, glucose, and galactose. Their Number-average Molecular Weight is 5.21 × 106 Da, 2.39 × 106 Da and 3.76 × 105 Da, respectively. In addition, all three types of EPS have good thermal stability and can improve the stability of casein. In addition, the analysis of the texture, particle size, potential, water holding capacity, rheology, low field nuclear magnetic resonance, microstructure, and flavor characteristics of yogurt confirmed the relationship between the molecular weight of LAB EPS and the gel properties of yogurt. Fluorescence spectrophotometer and circular dichroism analysis indicate that the different molecular weights of LAB EPS have different effects on protein structure, which is an intrinsic factor leading to significant differences in the gel properties of the three types of fermented milk. These findings provide new references for enhancing the understanding of the structure-activity relationship of EPS and indicate that EPS-LH43 can be used to improve the gel properties of dairy products.
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Affiliation(s)
- Kangyong Zhang
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Hongwei Tang
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Muhammad Salman Farid
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
| | - Fangqin Xiang
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Bailiang Li
- Food College, Northeast Agricultural University, Harbin 150030, China.
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Zhang K, Liu S, Tang H, Evivie SE, Guo Z, Li B. Effect of exopolysaccharides yield and addition concentration of Lactobacillus helveticus on the processing characteristics of fermented milk and its mechanism. Int J Biol Macromol 2024; 260:129480. [PMID: 38237823 DOI: 10.1016/j.ijbiomac.2024.129480] [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: 10/11/2023] [Revised: 12/22/2023] [Accepted: 01/11/2024] [Indexed: 01/22/2024]
Abstract
Exopolysaccharides (EPS) yield and added concentration of lactic acid bacteria can greatly affect the processing characteristics of fermented milk. In order to investigate the effects and mechanisms of EPS yield and added concentration on fermented milk, researchers extracted EPS from 50 strains of Lactobacillus helvedicus (L. helvedicus) and selected the two strains with the largest difference in EPS yield (L. helvedicus LH18 and L. helvetigus LH33) for subsequent experiments. The physicochemical properties of EPS-LH18 and EPS-LH33 were analyzed. The gel characteristics and protein conformation of fermented milk were studied by means of texture analyzer, rheometer, scanning electron microscopy, nuclear magnetic resonance machine, fluorescence spectrophotometer and circular dichroism. The results indicate that the monosaccharide compositions of EPS-LH18 and EPS-LH33 are the same and have good thermal stability. The texture and rheological properties of L. helveticus LH18 fermented milk are significantly superior to other fermented milk. The reason is that L. helveticus LH18 EPS has the highest yield, which leads to a denser gel structure, lower surface hydrophobicity and free sulfhydryl content of its fermented milk. According to circular dichroism analysis, β- sheet and random coil are the internal factors leading to the difference in fermented milk gel. In addition, the fermented milk improved even more favorably as the concentration of the two EPS additions increased. As described above, L. helveticus LH18 has the potential to be an excellent yogurt starter, and both of the above EPS can be used as probiotic stabilizer alternatives for fermented dairy products.
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Affiliation(s)
- Kangyong Zhang
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Sibo Liu
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Hongwei Tang
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Smith Etareri Evivie
- Department of Food Science and Human Nutrition, Faculty of Agriculture, University of Benin, Benin City 300001, Nigeria
| | - Zengwang Guo
- Food College, Northeast Agricultural University, Harbin 150030, China.
| | - Bailiang Li
- Food College, Northeast Agricultural University, Harbin 150030, China.
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Tian H, Gu Y, Lv Z, Wang L. The exopolysaccharides produced by Leuconostoc mesenteroides XR1 and its effect on silk drawing phenomenon of yoghurt. Int J Biol Macromol 2024; 262:129952. [PMID: 38320635 DOI: 10.1016/j.ijbiomac.2024.129952] [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: 08/08/2023] [Revised: 01/25/2024] [Accepted: 02/01/2024] [Indexed: 02/08/2024]
Abstract
Yoghurt fermented by Leuconostoc mesenteroides XR1 from Kefir grains was found to produce a unique silk drawing phenomenon. This property was found to be associated with the exopolysaccharides (EPS), X-EPS, produced by strain XR1. In order to better understand the mechanism that produced this phenomenon, the X-EPS was extracted, purified and characterized. The molecular weight and monosaccharide composition were determined by size exclusion chromatography coupled with multi-angle laser light scattering (SEC-MALLS) and ion chromatography (IC) analysis, respectively. The results showed that its molecular weight was 4.183 × 106 g/mol and its monosaccharide composition was glucose, and glucuronic acid, with the contents of 567.6148 and 0.2096 μg/mg, respectively. FT-IR and NMR analyses showed that X-EPS was an α-pyranose polysaccharide and was composed of 92.22 % α-(1 → 6) linked d-glucopyranose units and 7.77 % α-(1 → 3) branching. Furthermore, it showed a chain-like microstructure with branches in atomic force microscopy (AFM) and scanning electron microscopy (SEM) experiments. These results suggested that the unique structure of X-EPS, gave the yoghurt a strong viscosity and cohesiveness, which resulted in the silk drawing phenomenon. This work suggested that X-EPS holds the potential for food and industrial applications.
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Affiliation(s)
- Huimin Tian
- School of Food and Biological Engineering, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, Jiangsu, PR China
| | - Yachun Gu
- School of Food and Biological Engineering, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, Jiangsu, PR China
| | - Zili Lv
- School of Medical and Life Sciences/Reproductive & Women-Children Hospital, Chengdu University of Traditional Chinese Medicine, Chengdu 610041, China.
| | - Liang Wang
- School of Food and Biological Engineering, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, Jiangsu, PR China.
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Yue Y, Wang Y, Han Y, Zhang Y, Cao T, Huo G, Li B. Genome Analysis of Bifidobacterium Bifidum E3, Structural Characteristics, and Antioxidant Properties of Exopolysaccharides. Foods 2023; 12:2988. [PMID: 37627987 PMCID: PMC10453370 DOI: 10.3390/foods12162988] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
In this study, the antioxidant properties of intact cells (IC), cell-free supernatant (CFS), and cell-free extracts (CFE) and whole genome sequencing of Bifidobacterium bifidum E3 (B. bifidum E3), as well as the structural characteristics and antioxidant properties of EPS-1, EPS-2, and EPS-3, were evaluated. The results revealed that intact cells (IC), cell-free supernatant (CFS), and cell-free extracts (CFE) had potent DPPH (1,1-Diphenyl-2-picrylhydrazyl radical), hydroxyl, and superoxide anion radical scavenging capacities, among which CFS was the best. At the genetic level, we identified a strong carbohydrate metabolism capacity, an EPS synthesis gene cluster, and five sugar nucleotides in B. bifidum E3. Therefore, we extracted cEPS from B. bifidum E3 and purified it to obtain EPS-1, EPS-2, and EPS-3. EPS-1, EPS-2, and EPS-3 were heteropolysaccharides with an average molecular weight of 4.15 × 104 Da, 3.67 × 104 Da, and 5.89 × 104 Da, respectively. The EPS-1 and EPS-2 are mainly comprised of mannose and glucose, and the EPS-3 is mainly comprised of rhamnose, mannose, and glucose. The typical characteristic absorption peaks of polysaccharides were shown in Fourier transform infrared spectroscopy (FT-IR spectroscopy). The microstructural study showed a rough surface structure for EPS-1, EPS-2, and EPS-3. Furthermore, EPS-1, EPS-2, and EPS-3 exhibited potent DPPH, hydroxyl, and superoxide anion radical scavenging capacities. Correlation analysis identified that antioxidant capacities may be influenced by various factors, especially molecular weight, chemical compositions, and monosaccharide compositions. In summary, the EPS that was produced by B. bifidum E3 may provide insights into health-promoting benefits in humans.
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Affiliation(s)
- Yingxue Yue
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China (T.C.)
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Yuqi Wang
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Yu Han
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China (T.C.)
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Yifan Zhang
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China (T.C.)
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Ting Cao
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China (T.C.)
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Guicheng Huo
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China (T.C.)
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Bailiang Li
- Key Laboratory of Dairy Science, Ministry of Education, Northeast Agricultural University, Harbin 150030, China (T.C.)
- Food College, Northeast Agricultural University, Harbin 150030, China
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Wang L, Zhang F, Zheng B, Zhang Y, Pan L. Stability and flavor of set yogurt fortified with Tremella fuciformis polysaccharide during cold storage. Curr Res Food Sci 2023; 7:100536. [PMID: 37389155 PMCID: PMC10300073 DOI: 10.1016/j.crfs.2023.100536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/01/2023] [Accepted: 06/13/2023] [Indexed: 07/01/2023] Open
Abstract
Tremella fuciformis is an edible and medicinal fungus containing excellent nutritional value. T. fuciformis polysaccharide (TFP) is the important bioactive ingredients of T. fuciformis, which has gained great attention. The aim of this study was to investigate the effect of TFP on the stability and flavor of set yogurt. Our results revealed that the addition of 0.1% TFP had a positive effect on improving the stability of set yogurt including the water holding capacity, texture, rheological properties and microstructure at the cold storage period of 1, 7, 14 and 21 days. It is remarkable that the hardness, gumminess and chewiness of the set yogurt were significantly improved by the addition of TFP during the cold storage. Moreover, the set yogurt containing TFP was able to maintain better stability in the three intervals thixotropy test. In particular, the addition of 0.1% TFP had no adverse effects on the flavor of set yogurt, including sourness, sweetness, umami, bitterness, richness and saltiness. These data suggested that TFP can be used as a natural potential stabilizer for the set yogurt.
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Affiliation(s)
- Lin Wang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Fan Zhang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Baodong Zheng
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
- Integrated Scientific Research Base of Edible Fungi Processing and Comprehensive Utilization Technology, Ministry of Agriculture and Rural Affairs, Fuzhou, Fujian, 350002, China
| | - Yi Zhang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
- Integrated Scientific Research Base of Edible Fungi Processing and Comprehensive Utilization Technology, Ministry of Agriculture and Rural Affairs, Fuzhou, Fujian, 350002, China
| | - Lei Pan
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
- Integrated Scientific Research Base of Edible Fungi Processing and Comprehensive Utilization Technology, Ministry of Agriculture and Rural Affairs, Fuzhou, Fujian, 350002, China
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Yang Y, Jiang G, Tian Y. Biological activities and applications of exopolysaccharides produced by lactic acid bacteria: a mini-review. World J Microbiol Biotechnol 2023; 39:155. [PMID: 37039945 DOI: 10.1007/s11274-023-03610-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 04/05/2023] [Indexed: 04/12/2023]
Abstract
Exopolysaccharides (EPSs) are naturally occurring high-molecular-weight carbohydrates that have been widely studied for their biological activities, including antioxidant, immunomodulatory, anticancer and gut microbiota regulation activities. Polysaccharides are abundant in nature and can be derived from animals, plants, algae, and microorganisms, but among polysaccharides with potential uses, EPSs from microorganisms have the advantages of a short production cycle, high yield, and independence of production from season and climate and thus have broad prospects. While the safety of the producing microorganism can represent a problem in application of microbial EPSs, lactic acid bacteria (LAB) have been used by humans for thousands of years, and they and their products are generally recognized as safe. This makes LAB excellent sources for exopolysaccharides. EPS-producing LAB are readily found in nature. Through screening of strains, optimization of culture conditions, and improvement of the growth medium, the yield of EPSs from LAB can be increased and the scope of application broadened. This review summarizes EPSs from LAB in terms of structure, function and applications, as well as yield optimization, and introduces recent research on the biological activities and practical applications of LAB EPSs, aiming to provide references for researchers in related areas.
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Affiliation(s)
- Yi Yang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, PR China
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, 610065, PR China
| | - Guangyang Jiang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, PR China
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, 610065, PR China
| | - Yongqiang Tian
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, PR China.
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, 610065, PR China.
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Zhang X, LaPointe G, Liu Y, Wang X, Xiao L, Zhao X, Li W. Comparative analysis of exopolysaccharide-producing Lactiplantibacillus plantarum with ropy and non-ropy phenotypes on the gel properties and protein conformation of fermented milk. Food Chem 2023; 420:136117. [PMID: 37084472 DOI: 10.1016/j.foodchem.2023.136117] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/17/2023] [Accepted: 04/04/2023] [Indexed: 04/23/2023]
Abstract
In this study, we evaluated the impact of Lactiplantibacillus plantarum (L. plantarum) with ropy and non-ropy phenotypes on gel structure and protein conformation of fermented milk. Ropy L. plantarum (T1 & CL80) secreted EPS with high molecular weight (1.41 × 106, 1.19 × 106 Da) and intrinsic viscosity (486.46, 316.32 mL/g), effectively enhances fermented milk viscosity and water holding capacity (WHC) (65.4%, 84.6%) by forming a dense gel structure. Non-ropy L. plantarum (CSK & S-1A) fermented milk gel's high surface hydrophobicity and free sulfhydryl content caused high hardness and low WHC. Raman spectroscopy combined with circular dichroism analysis showed that high levels of α-helix (29.32-30.31%) and random roil (23.06-25.36%) protein structures are the intrinsic factors that contribute to the difference among fermented milk gels of ropy and non-ropy strains. This study provides a basis for understanding the structural variability of fermented milk gels using ropy or non-ropy lactic acid bacteria.
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Affiliation(s)
- Xueliang Zhang
- Sanya Institute of Nanjing Agricultural University, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Gisele LaPointe
- Canadian Research Institute for Food Safety, Department of Food Science, University of Guelph, Canada
| | - Yang Liu
- Sanya Institute of Nanjing Agricultural University, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Xiaomeng Wang
- Sanya Institute of Nanjing Agricultural University, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Luyao Xiao
- Sanya Institute of Nanjing Agricultural University, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Xiaogan Zhao
- Sanya Institute of Nanjing Agricultural University, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China
| | - Wei Li
- Sanya Institute of Nanjing Agricultural University, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, PR China.
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Ge Z, Bao X, Feng X, Yin X, Chen X, Dong M. In situ exopolysaccharides from Lactobacillus helveticus MB2-1 in Sayram ketteki yoghurt: Set yoghurts properties and interactions with sodium caseinate. Int J Biol Macromol 2022; 216:871-881. [PMID: 35882263 DOI: 10.1016/j.ijbiomac.2022.07.147] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 07/02/2022] [Accepted: 07/19/2022] [Indexed: 11/17/2022]
Abstract
The effects of high exopolysaccharides (EPS) - producing Lactobacillus helveticus MB2-1 on the structure and storage stability of set yoghurts, and the interactions between its EPS (molecular weight 9.34 × 104 Da) from Sayram ketteki yoghurt (SKY) and sodium caseinate (CAS) were studied. The rheology, microstructure, texture and storage stability of the three set yoghurts including control yoghurt (Control), adding-probiotic yoghurt (APY) and SKY were investigated, which showed that the SKY exhibited less shear thinning than the Control and APY, and the textural indexes and storage stability of the SKY were significantly better than that of other two yoghurts (p < 0.05). Moreover, the increased turbidity, decreased ζ potential and surface hydrophobicity of EPS/CAS complex coacervation were determined at EPS/CAS mass ratio of 3 (corresponding to 0.33 g/L of CAS and 1 g/L of EPS), mainly owing to the electrostatic attraction of the two biopolymers to form aggregates. Besides, the higher sizes and more aggregation of EPS/CAS complexes were formed at pH 3.5. Taken together, the results indicated that the high EPS-producing characteristic of L. helveticus MB2-1 could positively influence the qualities of set yoghurts, and the EPS/CAS complex coacervation in dairy products was closely related to the EPS/CAS mass ratio and pH condition.
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Affiliation(s)
- Zhiwen Ge
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Xuan Bao
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Xue Feng
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Xintao Yin
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Xiaohong Chen
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
| | - Mingsheng Dong
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China.
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Ge Z, Chen X, Yang R, Li W, Yin B, Li Z, Dong M. Structure of a unique fucose-containing exopolysaccharide from Sayram ketteki yoghurt and its anti-MRSA biofilm effect. Int J Biol Macromol 2022; 216:643-654. [PMID: 35777514 DOI: 10.1016/j.ijbiomac.2022.06.164] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/14/2022] [Accepted: 06/25/2022] [Indexed: 11/28/2022]
Abstract
In this work, we reported an in situ exopolysaccharide (in situ-EPS1) containing rare fucose produced by Lactobacillus helveticus MB2-1 in Sayram ketteki yoghurt, which made it unique. Its fine structure was characterized by GPC, HPLC, FT-IR, GC-MS,1HNMR and 13CNMR together with two-dimensional (2D) NMR spectra. The results revealed that in situ-EPS1 was a new heteropolysaccharide with molecular weight of 1.06 × 105 Da, and was composed of mannose, rhamnose, glucose, galactose and fucose with the following repeating units. Furthermore, the in situ-EPS1 exhibited significant antibiofilm effect against Methicillin-resistant Staphylococcus aureus (MRSA). Notably, the in situ-EPS1 did not interfere with the planktonic growth of MRSA strain, whereas inhibited its cell metabolic activity and the transcription of genes related to biofilm formation. This unique antibiofilm but non-antibacterial mechanism supposedly prevented the development of bacterial drug resistance, which may open a new door to fight against these drug-resistant microorganisms.
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Affiliation(s)
- Zhiwen Ge
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Road, Nanjing 210095, Jiangsu Province, China
| | - Xiaohong Chen
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Road, Nanjing 210095, Jiangsu Province, China
| | - Renqin Yang
- Yangzhou Kangyuan Dairy Co., Ltd., Yangzhou University, No. 88, Dingxing Road, Yangzhou 225009, Jiangsu Province, China
| | - Wei Li
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Road, Nanjing 210095, Jiangsu Province, China
| | - Baixing Yin
- Yangzhou Kangyuan Dairy Co., Ltd., Yangzhou University, No. 88, Dingxing Road, Yangzhou 225009, Jiangsu Province, China
| | - Zhiyu Li
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Road, Nanjing 210095, Jiangsu Province, China
| | - Mingsheng Dong
- College of Food Science and Technology, Nanjing Agricultural University, 1 Weigang Road, Nanjing 210095, Jiangsu Province, China.
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12
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He J, Li W, Deng J, Lin Q, Bai J, Zhang L, Fang Y. An insight into the health beneficial of probiotics dairy products: a critical review. Crit Rev Food Sci Nutr 2022; 63:11290-11309. [PMID: 35730254 DOI: 10.1080/10408398.2022.2090493] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Probiotic dairy products satisfy people's pursuit of health, and are widely favored because of their easy absorption, high nutritional value, and various health benefits. However, its effectiveness and safety are still controversial. This proposal aims to analyze the effect of probiotics on the quality characteristics of dairy products, clarify a series of physiological functions of probiotic dairy products and critically evaluate the effectiveness and safety of probiotic dairy products. Also, dairy products containing inactivated microorganisms were compared with probiotic products. The addition of probiotics enables dairy products to obtain unique quality characteristics, and probiotic dairy products have better health-promoting effects. This review will promote the further development of probiotic dairy products, provide directions for the research and development of probiotic-related products, and help guide the general public to choose and purchase probiotic fermentation products.
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Affiliation(s)
- JinTao He
- National Engineering Research Center of Rice and Byproduct Deep Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Wen Li
- National Engineering Research Center of Rice and Byproduct Deep Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, China
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, Jiangsu, China
| | - Jing Deng
- National Engineering Research Center of Rice and Byproduct Deep Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, China
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, Jiangsu, China
| | - QinLu Lin
- National Engineering Research Center of Rice and Byproduct Deep Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, China
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, Jiangsu, China
| | - Jie Bai
- National Engineering Research Center of Rice and Byproduct Deep Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Lin Zhang
- National Engineering Research Center of Rice and Byproduct Deep Processing, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Yong Fang
- College of Food Science and Engineering, Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, Jiangsu, China
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13
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Ge Z, Yin D, Li Z, Chen X, Dong M. Effects of Commercial Polysaccharides Stabilizers with Different Charges on Textural, Rheological, and Microstructural Characteristics of Set Yoghurts. Foods 2022; 11:1764. [PMID: 35741960 PMCID: PMC9223107 DOI: 10.3390/foods11121764] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/30/2022] [Accepted: 06/07/2022] [Indexed: 02/05/2023] Open
Abstract
The study investigated the preparation of set yoghurts by adding three common commercial polysaccharide stabilizers, namely sodium alginate (SA), gellan gum (GG), and konjac gum (KGM), in milk fermentation to evaluate their effects on the texture, rheology, and microstructure of set yoghurts. The physicochemical properties, water-holding capacity (WHC), texture, low-field nuclear magnetic resonance (LF-NMR), rheology, and microstructure of set yoghurts added with different kinds and quantities of polysaccharides were compared and analyzed. The results showed that the set yoghurts added with anionic polysaccharide GG had more obvious effects on improving WHC, firmness, and rheological properties compared with the set yoghurt added with KGM and SA. The firmness of set yoghurts with 0.02% (w/v) GG increased from 1.17 N to 1.32 N, which significantly improved the gel structure. The transverse relaxation time (T2) of set yoghurts added with GG was the closest to that of the control. Compared with the set yoghurts added with 0.02% SA and KGM, the free water area (A23) of the one added with 0.02% GG decreased most significantly. Moreover, all samples showed shear-thinning behavior, and the apparent elastic and viscous modulus (G', G″) increased with the increase of GG concentration. The G' and G″ of set yoghurts with 0.005% SA and KGM were higher than those in the control, decreased when adding 0.010%, and then increased with the increase of SA and KGM. Additionally, the microscopic observation demonstrated that the addition of GG in set yoghurts significantly promoted the formation of larger protein clusters and showed a tighter and more uniform protein network comparing with the other two polysaccharides (SA, KGM).
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Affiliation(s)
| | | | | | | | - Mingsheng Dong
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; (Z.G.); (D.Y.); (Z.L.); (X.C.)
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