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Padilla P, Andrade MJ, Peña FJ, Rodríguez A, Estévez M. An in vitro assay of the effect of lysine oxidation end-product, α-aminoadipic acid, on the redox status and gene expression in probiotic Lactobacillus reuteri PL503. Amino Acids 2021; 54:663-673. [PMID: 34657206 PMCID: PMC9117375 DOI: 10.1007/s00726-021-03087-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/01/2021] [Accepted: 10/04/2021] [Indexed: 01/18/2023]
Abstract
This study was designed to gain information about the underlying mechanisms of the effects of a food-occurring free oxidized amino acid, α-aminoadipic acid (AAA), on the probiotic Lactobacillus reuteri PL503. This bacterium was incubated in colonic-simulated conditions (37 °C for 24 h in microaerophilic conditions) and exposed to three food-compatible AAA concentrations, namely, 1 mM, 5 mM, and 10 mM. A control group with no AAA exposure was also considered. Each of the four experimental conditions was replicated three times and samplings were collected at 12, 16, 20, and 24 h. The downregulation of the uspA gene by AAA (0.5-fold decrease as compared to control) suggests that AAA is identified as a potential chemical threat. The dhaT gene, implicated in the antioxidant defense, was found to be upregulated in bacteria treated with 1 and 5 mM AAA (up to twofold increase, as compared to control), which suggest the ability of the oxidized amino acid to impair the redox status of the bacterium. In fact, AAA caused an increased production of reactive oxygen species (ROS) and the accretion of post-translational changes (protein carbonylation) in L. reuteri (up to 13 nmol allysine/mg protein vs 1.8 nmol allysine/mg protein in control). These results suggest that probiotic bacteria identify oxidized amino acids as harmful species and activate mechanisms that may protect themselves and the host against their noxious effects.
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Affiliation(s)
- Patricia Padilla
- Food Technology, IPROCAR Research Institute, University of Extremadura, 10003, Cáceres, Spain.,Faculty of Veterinary Science, IPROCAR Research Institute, Food Hygiene and Safety, University of Extremadura, 10003, Cáceres, Spain
| | - María J Andrade
- Faculty of Veterinary Science, IPROCAR Research Institute, Food Hygiene and Safety, University of Extremadura, 10003, Cáceres, Spain
| | - Fernando J Peña
- Laboratory of Equine Reproduction and Equine Spermatology, University of Extremadura, 10003, Cáceres, Spain
| | - Alicia Rodríguez
- Faculty of Veterinary Science, IPROCAR Research Institute, Food Hygiene and Safety, University of Extremadura, 10003, Cáceres, Spain
| | - Mario Estévez
- Food Technology, IPROCAR Research Institute, University of Extremadura, 10003, Cáceres, Spain.
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Sun ZH, Yao MJ, Bian X, Guo QQ, Guan HN, Yang Y, Wang B, Shi YG, Piekoszewski W, Yang XW, Zhang N. The influence of soy protein hydrolysate (SPH) addition to infant formula powder on Streptococcus thermophilus proliferation and metabolism. Food Res Int 2021; 141:110103. [PMID: 33641970 DOI: 10.1016/j.foodres.2020.110103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 08/31/2020] [Revised: 11/16/2020] [Accepted: 12/28/2020] [Indexed: 10/22/2022]
Abstract
Nowadays, more and more infants are getting allergic to cow's milk protein, so it is urgent to search for infant formula powder with milk protein alternatives. In the present work, soy protein hydrolysate (SPH) was added to protein-free infant formula powder and the effects of SPH addition on proliferation and metabolism of Streptococcus thermophilus were studied. Compared with commercially available infant formula powder (CK) and protein-free milk powder (BK), the infant formula powder with 20% SPH significantly enhanced the proliferation of S. thermophilus in MRS medium, resulting in a higher cell density and greater viable counts. Moreover, the influence of SPH on the metabolism of S. thermophilus was investigated by analyzing the content of seven organic acids and H2O2 in the medium. The higher content of organic acids and H2O2 is consistent with the stronger antibacterial activity to Escherichia coli. As a consequence, the addition of SPH to infant formula powder can effectively promote the growth of probiotics and SPH may be a promising protein alternative in the infant formula powder.
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Affiliation(s)
- Zhi-Hui Sun
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China
| | - Ming-Jing Yao
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China; Shandong Provincial Key Laboratory of Food and Fermentation Engineering, Shandong Food Ferment Industry Research & Design Institute, Qilu University of Technology (Shandong Academy of Sciences), No.41, JieFang Road, LiXia District, Jinan 250013, PR China
| | - Xin Bian
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China
| | - Qing-Qi Guo
- Forestry School, Northeast Forestry University, No.26, HeXing Street, XiangFang District, Harbin 150040, PR China
| | - Hua-Nan Guan
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China
| | - Yang Yang
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China
| | - Bing Wang
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China
| | - Yan-Guo Shi
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China
| | - Wojciech Piekoszewski
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa, 30-868 Krakow, Poland; School of Biomedicine, Far Eastern Federal University, FEFU Campus, Russian Island, Vladivostok, Russian Federation
| | - Xiao-Wan Yang
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China; Shanghai Special Favor Biotechnology Co., Ltd, No. 56, JunGong Road, Yangpu District, Shanghai 200433, PR China
| | - Na Zhang
- Key Laboratory of Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, 36# No.138, TongDa Street, DaoLi District, Harbin 150076, PR China.
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