A flow cytometry method for quantitative measurement and molecular investigation of the adhesion of bacteria to yeast cells.

Autor: Schiavone M; Toulouse Biotechnology Institute (TBI), UMR INSA-CNRS 5504 & INRA 792, 135 Avenue de Rangeuil, 31077, Toulouse, France.; Lallemand SAS, 19, Rue Des Briquetiers, 31702, Blagnac, France., Dagkesamanskaya A; Toulouse Biotechnology Institute (TBI), UMR INSA-CNRS 5504 & INRA 792, 135 Avenue de Rangeuil, 31077, Toulouse, France., Vieu PG; Toulouse Biotechnology Institute (TBI), UMR INSA-CNRS 5504 & INRA 792, 135 Avenue de Rangeuil, 31077, Toulouse, France., Duperray M; Toulouse Biotechnology Institute (TBI), UMR INSA-CNRS 5504 & INRA 792, 135 Avenue de Rangeuil, 31077, Toulouse, France., Duplan-Eche V; Institut Toulousain Des Maladies Infectieuses Et Inflammatoires (Infinity), CNRS U5051, INSERM U1291, University Toulouse III, 31000, Toulouse, France., François JM; Toulouse Biotechnology Institute (TBI), UMR INSA-CNRS 5504 & INRA 792, 135 Avenue de Rangeuil, 31077, Toulouse, France. fran_jm@insa-toulouse.fr.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Sep 09; Vol. 14 (1), pp. 20935. Date of Electronic Publication: 2024 Sep 09.
DOI: 10.1038/s41598-024-72030-w
Abstrakt: The study of microorganism interactions is important for understanding the organization and functioning of microbial consortia. Additionally, the interaction between yeast and bacteria is of interest in the field of health and nutrition area for the development of probiotics. To investigate these microbial interactions at the cellular and molecular levels, a simple, reliable, and quantitative method is proposed. We demonstrated that flow cytometry enables the measurement of interactions at a single-cell level by detecting and counting yeast cells with bound fluorescent bacteria. Imaging flow cytometry revealed that the number of bacteria attached to yeast followed a Gaussian distribution whose maximum reached 14 bacterial cells using a clinical Escherichia coli strain E22 and the laboratory yeast strain BY4741. We found that the dynamics of adhesion resemble a Langmuir adsorption model, albeit it is a rapid and almost irreversible process. This adhesion is dependent on the mannose-specific type 1 fimbriae, as E. coli mutants lacking these appendages no longer adhere to yeast. However, this type 1 fimbriae-dependent adhesion could involve additional yeast cell wall factors, since the interaction between bacteria and yeast mutants with altered mannan content remained comparable to that of wild-type yeast. In summary, flow cytometry is an appropriate method for studying bacteria-yeast adhesion, as well as for the high-throughput screening of candidate molecules likely to promote or counteract this interaction.
(© 2024. The Author(s).)
Databáze: MEDLINE
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