The floor layer (S-layer) of probiotic micro organism performs an necessary position of their interplay with the host immune system. On this article, Valentina Taverniti , Paolo D’Incecco , Stefano Farris , Peter Riber Jonsen , Helene Skovsted Eld , Juliane Sørensen, Laura Brunelli, Giacomo Mantegazza, Stefania Arioli and Hanne Frøkiær, investigated how the thickness of the S-layer influences the power of Lactobacillus helveticus MIMLh5 and Lactobacillus acidophilus NCFM to stimulate Th1-related cytokine manufacturing in dendritic cells.
The outcomes revealed an inverse correlation between S-layer thickness and the induction of interleukin-12, indicating that thinner S-layers are related to a stronger immune-stimulating response. These findings present new insights into the construction–operate relationship of bacterial floor layers and their position in probiotic–host interactions.
Atomic pressure microscopy (AFM) was used for nanomechanical and morphological characterization of bacterial cells. Measurements had been carried out utilizing a commercially accessible AFM instrument operated in touch resonance amplitude imaging (CRAI) mode. An Nanoworld Arrow-FMR pressure modulation AFM probe was used. This silicon AFM probe includes a rectangular beam with a triangular free finish and a tetrahedral tip (tip radius ~10 nm, tip peak 10–15 μm), a spring fixed of two.8 N/m and a resonance frequency of 75 kHz. Photos of 10 × 10 μm² and pressure–distance curves had been recorded at a number of areas on the bacterial floor. Nanomechanical properties, together with the elastic (Younger’s) modulus, had been decided by becoming strategy curves to the Hertzian mannequin with an indentation depth set to 2 nm.
Determine S1: Schematic illustration of the 4-step process for the AFM evaluation of the micro organism floor: scanning of the floor in touch resonance amplitude (CRAI) mode (a); creation of the 10-point map of the nanomechanical take a look at (b); technology of the force-distance curves (c); and becoming process for the extrapolation of the elastic modulus (d).
Taverniti, V.; D’Incecco, P.; Farris, S.; Jonsen, P. R.; Eld, H. S.; Sørensen, J.; Brunelli, L.; Mantegazza, G.; Arioli, S.; Mora, D.; Guglielmetti, S.; Frøkiær, H.
The Capacities of the Probiotic Strains L. helveticus MIMLh5 and L. acidophilus NCFM to Induce Th1-Stimulating Cytokines in Dendritic Cells Are Inversely Correlated with the Thickness of Their S-Layers.
Biomolecules 2025, 15(7), 1012.
https://doi.org/10.3390/biom15071012
The article: The Capacities of the Probiotic Strains L. helveticus MIMLh5 and L. acidophilus NCFM to Induce Th1-Stimulating Cytokines in Dendritic Cells Are Inversely Correlated with the Thickness of Their S-Layers, is licensed beneath a Inventive Commons Attribution 4.0 Worldwide License, which allows use, sharing, adaptation, distribution and copy in any medium or format, so long as you give applicable credit score to the unique creator(s) and the supply, present a hyperlink to the Inventive Commons license, and point out if modifications had been made. The photographs or different third occasion materials on this article are included within the article’s Inventive Commons license, except indicated in any other case in a credit score line to the fabric. If materials shouldn’t be included within the article’s Inventive Commons license and your supposed use shouldn’t be permitted by statutory regulation or exceeds the permitted use, you have to to acquire permission straight from the copyright holder. To view a duplicate of this license, go to http://creativecommons.org/licenses/by/4.0/.
