Effects of Lactococcus lactis MG1363 producing fusion proteins of bovine lactoferricin–lactoferrampin on growth, intestinal morphology and immune function in weaned piglet

2019 ◽  
Vol 127 (3) ◽  
pp. 856-866 ◽  
Author(s):  
L. Song ◽  
X. Qiao ◽  
D. Zhao ◽  
W. Xie ◽  
S.M. Bukhari ◽  
...  
Keyword(s):  
Immune Function ◽  
Lactococcus Lactis ◽  
Fusion Proteins ◽  
Intestinal Morphology ◽  
Weaned Piglet ◽  
Bovine Lactoferricin

scholarly journals Probiotic effect of Lactococcus lactis subsp. cremoris RPG-HL-0136 on intestinal mucosal immunity in mice

2021 ◽  
Vol 64 (1) ◽  
Author(s):  
Byoung Hee Park ◽  
In Sung Kim ◽  
Jung Kuk Park ◽  
Zheng Zhi ◽  
Hea Min Lee ◽  
...  
Keyword(s):  
Immune Function ◽  
Lactococcus Lactis ◽  
Manufacturing Industry ◽  
Probiotic Strain ◽  
Short Chain Fatty Acids ◽  
Antibacterial Peptides ◽  
Beneficial Bacteria ◽  
Simultaneous Decrease ◽  
Muc2 Expression ◽  
Probiotic Effect

AbstractLactococcus lactis subsp. cremoris is a lactic acid bacterium commonly used in the cheese manufacturing industry. It is known to produce antibacterial peptides and has recently received attention for its role as a probiotic strain. Here, we report the isolation of a new strain, Lactococcus lactis subsp. cremoris RPG-HL-0136 (RPG0136) from dried compost, which exhibits strong antibacterial activity. When RPG0136 was fed to mice, it increased the intestinal population of two beneficial bacteria, Lactobacillus and Bifidobacterium, whereas it decreased the intestinal population of two harmful bacteria, Bacteroides and Enterobacter. In addition, it increased the concentration of short-chain fatty acids, including acetic acid, propionic acid, and butyric acid, with a simultaneous decrease in pH, and accelerated the catabolic degradation of proteins, lipids, and starch. Lastly, RPG0136 increased the plasma IgG and intestinal mucosal SIgA concentrations and upregulated Reg3r, MUC1, and MUC2 expression to improve the intestinal mucosal immune function. The results of this study suggest that RPG0136 is a potential probiotic strain that supports the growth of a beneficial microbiome by promoting the synthesis of organic acids and enhancing intestinal immune function.

Effects of Clostridium butyricum and Enterococcus faecalis on growth performance, immune function, intestinal morphology, volatile fatty acids, and intestinal flora in a piglet model

2019 ◽  
Vol 10 (12) ◽  
pp. 7844-7854 ◽  
Author(s):  
Kangli Wang ◽  
Guangtian Cao ◽  
Haoran Zhang ◽  
Qing Li ◽  
Caimei Yang
Keyword(s):  
Fatty Acids ◽  
Immune Function ◽  
Growth Performance ◽  
Enterococcus Faecalis ◽  
Volatile Fatty Acids ◽  
Intestinal Flora ◽  
Clostridium Butyricum ◽  
Intestinal Morphology

We investigated the effects of Clostridium butyricum and Enterococcus faecalis (probiotics) in a piglet model.

scholarly journals Lactobacillus bulgaricus Proteinase Expressed in Lactococcus lactis Is a Powerful Carrier for Cell Wall-Associated and Secreted Bovine β-Lactoglobulin Fusion Proteins

2002 ◽  
Vol 68 (6) ◽  
pp. 2917-2923 ◽  
Author(s):  
Eric Bernasconi ◽  
Jacques-Edouard Germond ◽  
Michèle Delley ◽  
Rodolphe Fritsché ◽  
Blaise Corthésy
Keyword(s):  
Cell Surface ◽  
Lactococcus Lactis ◽  
Fusion Proteins ◽  
Surface Display ◽  
Major Allergen ◽  
Full Length ◽  
Lactobacillus Bulgaricus ◽  
Heterologous Proteins ◽  
Food Antigens ◽  
Β Lactoglobulin

ABSTRACT Lactic acid bacteria have a good potential as agents for the delivery of heterologous proteins to the gastrointestinal mucosa and thus for the reequilibration of inappropriate immune responses to food antigens. Bovine β-lactoglobulin (BLG) is considered a major allergen in cow's milk allergy. We have designed recombinant Lactococcus lactis expressing either full-length BLG or BLG-derived octapeptide T6 (IDALNENK) as fusions with Lactobacillus bulgaricus extracellular proteinase (PrtB). In addition to constructs encoding full-length PrtB for the targeting of heterologous proteins to the cell surface, we generated vectors aiming at the release into the medium of truncated PrtB derivatives lacking 100 (PrtB∂, PrtB∂-BLG, and PrtB∂-T6) or 807 (PrtBΔ) C-terminal amino acids. Expression of recombinant products was confirmed using either anti-PrtB, anti-BLG, or anti-peptide T6 antiserum. All forms of the full-length and truncated recombinant products were efficiently translocated, irrespective of the presence of eucaryotic BLG sequences in the fusion proteins. L. lactis expressing PrtB∂-BLG yielded up to 170 μg per 109 CFU in the culture supernatant and 9 μg per 109 CFU at the bacterial cell surface within 14 h. Therefore, protein fusions relying on the use of PrtB gene products are adequate for concomitant cell surface display and secretion by recombinant L. lactis and thus may ensure maximal bioavailability of the eucaryotic antigen in the gut-associated lymphoid tissue.

scholarly journals Chitosan-zinc chelate improves intestinal structure and mucosal function and decreases apoptosis in ileal mucosal epithelial cells in weaned pigs

2014 ◽  
Vol 111 (8) ◽  
pp. 1405-1411 ◽  
Author(s):  
Xin-Yan Han ◽  
Yuan-Fei Ma ◽  
Meng-Yuan Lv ◽  
Zhi-Peng Wu ◽  
Li-Chun Qian
Keyword(s):  
Epithelial Cell ◽  
Epithelial Cells ◽  
Immune Function ◽  
Cell Apoptosis ◽  
Control Diet ◽  
Intestinal Morphology ◽  
Secretory Iga ◽  
Control Group ◽  
Mucosal Epithelial Cell ◽  
Epithelial Cell Apoptosis

The present study was conducted to investigate the effects of chitosan (CS)-Zn on intestinal morphology, mucosal epithelial cell apoptosis and mucosal immune function in weanling pigs. A total of 150 weanling barrows with a body weight of 7·2 kg were randomly allocated into five groups. A basal diet without Zn supplementation was used as the control and other four groups were fed the control diet supplemented with 50 or 100 mg/kg of Zn as CS-Zn, 100 mg/kg of Zn as ZnSO4 and 3000 mg/kg of Zn as ZnO, respectively. The feeding trial lasted for 28 d. The results showed that serum diamine oxidase activities, d-lactate levels and endotoxin contents were lower in pigs fed dietary 100 mg/kg of Zn as CS-Zn or 3000 mg/kg of Zn as ZnO than in pigs fed the control or 100 mg Zn/kg as ZnSO4 diet. The ratios of the villus height:crypt depth of the duodenum, jejunum and ileum were higher in pigs that received 100 mg/kg of Zn as CS-Zn or a high level of Zn as ZnO than in pigs fed the control diet. Moreover, terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick end labelling (TUNEL)-stained ileal epithelial cells were found in the control group, and apoptotic cells did not appear prominently in pigs that received the 100 mg/kg of CS-Zn or ZnO diet. Secretory IgA concentration in ileal mucus was increased in the dietary group that received 100 mg/kg of CS-Zn or ZnO. These results indicated that dietary 100 mg CS-Zn/kg had similar biological effects to dietary 3000 mg ZnO/kg on intestinal morphology, mucosal epithelial cell apoptosis and mucosal immune function.

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