Probiotic potential of Staphylococcus hominis MBBL 2–9 as anti‐Staphylococcus aureus agent isolated from the vaginal microbiota of a healthy woman |
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| Authors: | C Sung B‐G Kim S Kim H‐S Joo PI Kim |
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| Institution: | 1. Interdisciplinary Program for Bioengineering, Seoul National University, Seoul, Korea;2. School of Chemical and Biological Engineering, Institute of Molecular Biology and Genetics, Seoul National University, Seoul, Korea;3. Institute of Bioengineering, Seoul National University, Seoul, Korea;4. Division of Food Science, Korea University, Anam‐dong, Sungbuk‐ku, Seoul, Korea |
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| Abstract: | Aims: To isolate and characterize an antagonist for use as probiotic agent in the biocontrol of Staphylococcus aureus. Methods and Results: Bacteria that exhibited antimicrobial activity against Gram‐positive bacteria including Staph. aureus were isolated from 12 healthy women, with Staphylococcus hominis MBBL 2–9 showing the strongest activity. The bacteriocin produced by Staph. hominis MBBL 2–9 was purified by 60% ammonium sulfate saturation, ultrafiltration, HLB cartridge and reverse‐phase HPLC. The molecular weight was estimated as 2038·2 Da by MALDI–TOF mass spectrometry. The antagonist survived up to 2 h in artificial gastric juice (pH 2·5) and grew in the presence of 1% porcine bile extract. In addition, Staph. hominis MBBL 2–9 adhered effectively to HT‐29 epithelial cell line. Conclusion: Staphylococcus hominis MBBL 2–9 exhibited desirable probiotic traits such as acid tolerance, bile resistance and adherence to epithelial cell line. The bacterium also produced a bacteriocin with unique molecular weight and high antimicrobial activity similar to traditional antibiotics. Significance and Impact of the Study: This study is the first report of a bacteriocin‐producing Staph. hominis MBBL 2–9 that has potential for use as a probiotic agent against Staph. aureus. |
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| Keywords: | antagonist bacteriocin biocontrol probiotics Staphylococcus hominis MBBL 2– 9 |
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