Lactobacillus rhamnosus GG microcapsules inhibit Escherichia coli biofilm formation in coculture (original) (raw)

Abstract

Objectives

Microbial biofilms have become one of the most significant causes of nosocomial infections. The aim of this study was to examine the potential quorum sensing inhibitor activities of Lactobacillus rhamnosus GG microcapsules.

Results

Lactobacillus rhamnosus GG microcapsules effectively inhibited initial biofilm formation at a concentration of 2.5 × 108 CFU/mL. Furthermore, the inhibition rate was increased to 79% in the Lactobacillus rhamnosus GG microcapsules group, resulting in a reduction in the biofilm maturation stage. In addition, real-time PCR analysis revealed that the LGG microcapsules can act as effective inhibitors of transcriptional activators of the quorum sensing circuit in E.coli, luxS, lsrK, and lsrR.

Conclusions

Lactobacillus rhamnosus GG microcapsules can effectively inhibit biofilm formation and disturb mature biofilms.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 81601734), Liaoning Provincial Natural Science Foundation of China (Grant No. 20180530062) and a Basic Research Projects Grant of the Key Laboratory of the Education Department of Liaoning Province (Grant No. LZ2015028).

Supporting information

Supplementary Table 1―PCR primer sequences.

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Authors and Affiliations

  1. Clinical Laboratory of Integrative Medicine, First Hospital Affiliated to Dalian Medical University, 222 Zhongshan Road, Dalian, 116023, Liaoning, People’s Republic of China
    Huiyi Song, Jialin Qu, Jianjun Liu, Peiyuan Yin, Guixin Zhang & Dong Shang
  2. College of Pharmacy, Dalian Medical University, Dalian, Liaoning, People’s Republic of China
    Jianbin Zhang
  3. The Third Department of General Surgery, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, People’s Republic of China
    Guixin Zhang & Dong Shang

Authors

  1. Huiyi Song
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  2. Jianbin Zhang
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  3. Jialin Qu
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  4. Jianjun Liu
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  5. Peiyuan Yin
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  6. Guixin Zhang
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  7. Dong Shang
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Corresponding authors

Correspondence toGuixin Zhang or Dong Shang.

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Song, H., Zhang, J., Qu, J. et al. Lactobacillus rhamnosus GG microcapsules inhibit Escherichia coli biofilm formation in coculture.Biotechnol Lett 41, 1007–1014 (2019). https://doi.org/10.1007/s10529-019-02694-2

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