Abstract
In this study, Lactobacillus crispatus UBLCp01, Lactobacillus gasseri UBLG36, and Lactobacillus johnsonii UBLJ01 isolated from the vagina of healthy reproductive age Indian women were screened for beneficial probiotic properties. These strains showed the ability to survive acidic and simulated vaginal fluid conditions and could adhere to mucin. Lact. gasseri UBLG36, and Lact. johnsonii UBLJ01 produced d- and l-lactic acid, whereas Lact. crispatus UBLCp01 produced hydrogen peroxide and d- and l-lactic acid. All strains inhibited the growth of pathogens (Escherichia coli, Gardnerella vaginalis, Proteus mirabilis, and Candida albicans) and were capable of co-aggregating with them with varying degrees. Strains secreted exopolysaccharides and formed biofilms under in vitro conditions. Safety assessment showed that these strains had a usual antibiotic susceptibility profile, did not produce hemolysins, gelatinases, and mucin degrading enzymes. Based on strain characteristics and beneficial properties, we believe that these strains are promising candidates for human trials to confirm their ability to prevent/treat vaginal dysbiosis and maintain a healthy vaginal eco-system.
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This work was supported by Unique Biotech Limited, Hyderabad, India.
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Ahire JJ, Lakshmi SG, and Madempudi RS contributed to the study conception, Ahire JJ design the study. Material preparation, data collection, and analysis were performed by Ahire JJ, Kashikar MS, Sahoo S. Heerekar A re-confirmed the strains by DNA analysis. The first draft of the manuscript was written by Ahire JJ and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Ahire JJ, Kashikar MS, Heerekar A, Lakshmi SG were employed by Unique Biotech Limited. Sahoo S worked as a project intern. Madempudi RS is the Managing Director of Unique Biotech Limited. This does not alter our adherence to journal policies on sharing data and materials.
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Ahire, J.J., Sahoo, S., Kashikar, M.S. et al. In Vitro Assessment of Lactobacillus crispatus UBLCp01, Lactobacillus gasseri UBLG36, and Lactobacillus johnsonii UBLJ01 as a Potential Vaginal Probiotic Candidate. Probiotics & Antimicro. Prot. 15, 275–286 (2023). https://doi.org/10.1007/s12602-021-09838-9
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DOI: https://doi.org/10.1007/s12602-021-09838-9