Limosilactobacillus reuteri and Lactiplantibacillus plantarum strains, previously isolated from weaned piglets, were considered for the evaluation of their adhesive characteristics. Lactobacilli were treated with LiCl in order to remove the surface protein layer, and probiotic activity was compared with those of untreated strains. The autoaggregation, co-aggregation to E. coli F18+, and adhesive abilities of LiCl-treated Limosilactobacillus reuteri and Lactiplantibacillus plantarum were significantly inhibited (p < 0.05) compared with the respective untreated strain. The hydrophobic and basic phenotypes were observed due to the strong affinity to chloroform and low adherence to ethyl acetate. In particular, L. plantarum showed higher hydrophobicity compared to L. reuteri, which may reflect their different colonizing ability. After treatment with LiCl to remove surface proteins, the adherence capabilities of L. reuteri and L. casei on IPEC-J2 cells decreased significantly (p < 0.001) and L. reuteri adhered more frequently. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) showed that both L. reuteri and L. plantarum had several bands ranging from 20 to 100 kDa. Two-dimensional gel electrophoresis showed an acidic profile of the surface-layer polypeptides for both bacterial strains, and more studies are needed to characterize their profile and functions. The results confirm the pivotal role of surface proteins in the probiotic potential of L. reuteri and L. plantarum.

Evaluation of Adhesive Characteristics of L. plantarum and L. reuteri Isolated from Weaned Piglets / M. Dell’Anno, C. Giromini, S. Reggi, M. Cavalleri, A. Moscatelli, E. Onelli, R. Rebucci, T.S. Sundaram, S. Coranelli, A. Spalletta, A. Baldi, L. Rossi. - In: MICROORGANISMS. - ISSN 2076-2607. - 9:8(2021 Aug), pp. 1587.1-1587.12. [10.3390/microorganisms9081587]

Evaluation of Adhesive Characteristics of L. plantarum and L. reuteri Isolated from Weaned Piglets

M. Dell’Anno
Primo
;
C. Giromini
Secondo
;
S. Reggi;A. Moscatelli;E. Onelli;R. Rebucci;T.S. Sundaram;A. Baldi;L. Rossi
Ultimo
2021-08

Abstract

Limosilactobacillus reuteri and Lactiplantibacillus plantarum strains, previously isolated from weaned piglets, were considered for the evaluation of their adhesive characteristics. Lactobacilli were treated with LiCl in order to remove the surface protein layer, and probiotic activity was compared with those of untreated strains. The autoaggregation, co-aggregation to E. coli F18+, and adhesive abilities of LiCl-treated Limosilactobacillus reuteri and Lactiplantibacillus plantarum were significantly inhibited (p < 0.05) compared with the respective untreated strain. The hydrophobic and basic phenotypes were observed due to the strong affinity to chloroform and low adherence to ethyl acetate. In particular, L. plantarum showed higher hydrophobicity compared to L. reuteri, which may reflect their different colonizing ability. After treatment with LiCl to remove surface proteins, the adherence capabilities of L. reuteri and L. casei on IPEC-J2 cells decreased significantly (p < 0.001) and L. reuteri adhered more frequently. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) showed that both L. reuteri and L. plantarum had several bands ranging from 20 to 100 kDa. Two-dimensional gel electrophoresis showed an acidic profile of the surface-layer polypeptides for both bacterial strains, and more studies are needed to characterize their profile and functions. The results confirm the pivotal role of surface proteins in the probiotic potential of L. reuteri and L. plantarum.
E. coli; F18; Gastro-intestinal system; Intestinal adhesion; IPEC-J2; Lactobacillus plantarum; Lactobacillus reuteri; Pig; Probiotic; Surface proteins
Settore AGR/18 - Nutrizione e Alimentazione Animale
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/859725
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