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Volume 6, Issue 1

Safety assessment of five candidate probiotic lactobacilli using comparative genome analysis Open Access

Abstract

Micro-organisms belonging to the genus complex are often used for oral consumption and are generally considered safe but can exhibit pathogenicity in rare and specific cases. Therefore, screening and understanding genetic factors that may contribute to pathogenicity can yield valuable insights regarding probiotic safety. LM1, SK151, BS25, SK152 and PF01 are current probiotics of interest; however, their safety profiles have not been explored. The genome sequences of LM1, SK151, SK152 and PF01 were downloaded from the NCBI GenBank, while that of BS25 was newly sequenced. These genomes were then annotated using the Rapid Annotation using Subsystem Technology tool kit pipeline. Subsequently, a command line was performed against the Virulence Factor Database (VFDB) and the Comprehensive Antibiotic Resistance Database (CARD) to identify potential virulence factors and antibiotic resistance (AR) genes. Furthermore, ResFinder was used to detect acquired AR genes. The query against the VFDB identified genes that have a role in bacterial survivability, platelet aggregation, surface adhesion, biofilm formation and immunoregulation; and no acquired AR genes were detected using CARD and ResFinder. The study shows that the query strains exhibit genes identical to those present in pathogenic bacteria with the genes matched primarily having roles related to survival and surface adherence. Our results contribute to the overall strategies that can be employed in pre-clinical safety assessments of potential probiotics. Gene mining using whole-genome data, coupled with experimental validation, can be implemented in future probiotic safety assessment strategies.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): bioinformatics , comparative genomics , Lactobacillus , pathogenicity , probiotics and virulence
Funding
This study was supported by the:
  • Philippine Council for Health Research and Development
    • Principle Award Recipient: PatrickJosemaria del Rosario Altavas
© 2024 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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2024-01-31
2024-05-06
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Safety assessment of five candidate probiotic lactobacilli using comparative genome analysis
Access Microbiology 6, 000715.v4 (2024); https://doi.org/10.1099/acmi.0.000715.v4
/content/journal/acmi/10.1099/acmi.0.000715.v4
/content/journal/acmi/10.1099/acmi.0.000715.v4
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