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Int. J. Mol. Sci. 2013, 14(6), 12004-12012; doi:10.3390/ijms140612004
Short Note

Interactions between Lactobacillus crispatus and Bacterial Vaginosis (BV)-Associated Bacterial Species in Initial Attachment and Biofilm Formation

1,2
, 2
 and 1,*
Received: 28 March 2013; in revised form: 16 May 2013 / Accepted: 31 May 2013 / Published: 5 June 2013
(This article belongs to the Special Issue Biofilms: Extracellular Bastions of Bacteria)
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Abstract: Certain anaerobic bacterial species tend to predominate the vaginal flora during bacterial vaginosis (BV), with Gardnerella vaginalis being the most common. However, the exact role of G. vaginalis in BV has not yet been determined. The main goal of this study was to test the hypothesis that G. vaginalis is an early colonizer, paving the way for intermediate (e.g., Fusobacterium nucleatum) and late colonizers (e.g., Prevotella bivia). Theoretically, in order to function as an early colonizer, species would need to be able to adhere to vaginal epithelium, even in the presence of vaginal lactobacilli. Therefore, we quantified adherence of G. vaginalis and other BV-associated bacteria to an inert surface pre-coated with Lactobacillus crispatus using a new Peptide Nucleic Acid (PNA) Fluorescence In Situ Hybridization (FISH) methodology. We found that G. vaginalis had the greatest capacity to adhere in the presence of L. crispatus. Theoretically, an early colonizer would contribute to the adherence and/or growth of additional species, so we next quantified the effect of G. vaginalis biofilms on the adherence and growth of other BV-associated species by quantitative Polymerase Chain Reaction (qPCR) technique. Interestingly, G. vaginalis derived a growth benefit from the addition of a second species, regardless of the species. Conversely, G. vaginalis biofilms enhanced the growth of P. bivia, and to a minor extent of F. nucleatum. These results contribute to our understanding of BV biofilm formation and the progression of the disorder.
Keywords: Lactobacillus spp.; Gardnerella vaginalis; BV anaerobes; initial adhesion; epithelial cell line; fluorescence in situ hybridization; peptide nucleic acid; quantitative-PCR Lactobacillus spp.; Gardnerella vaginalis; BV anaerobes; initial adhesion; epithelial cell line; fluorescence in situ hybridization; peptide nucleic acid; quantitative-PCR
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Machado, A.; Jefferson, K.K.; Cerca, N. Interactions between Lactobacillus crispatus and Bacterial Vaginosis (BV)-Associated Bacterial Species in Initial Attachment and Biofilm Formation. Int. J. Mol. Sci. 2013, 14, 12004-12012.

AMA Style

Machado A, Jefferson KK, Cerca N. Interactions between Lactobacillus crispatus and Bacterial Vaginosis (BV)-Associated Bacterial Species in Initial Attachment and Biofilm Formation. International Journal of Molecular Sciences. 2013; 14(6):12004-12012.

Chicago/Turabian Style

Machado, António; Jefferson, Kimberly K.; Cerca, Nuno. 2013. "Interactions between Lactobacillus crispatus and Bacterial Vaginosis (BV)-Associated Bacterial Species in Initial Attachment and Biofilm Formation." Int. J. Mol. Sci. 14, no. 6: 12004-12012.


Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert