PMID- 24290648 OWN - NLM STAT- MEDLINE DCOM- 20140709 LR - 20220321 IS - 1095-9998 (Electronic) IS - 0740-0020 (Linking) VI - 38 DP - 2014 Apr TI - Tailoring the probiotic potential of non-starter Lactobacillus strains from ripened Parmigiano Reggiano cheese by in vitro screening and principal component analysis. PG - 240-9 LID - S0740-0020(13)00203-7 [pii] LID - 10.1016/j.fm.2013.10.003 [doi] AB - Non-starter lactic acid bacteria (NSLAB) inhabiting fermented food have been recently revised as source of probiotic strains. Here, we in vitro assessed the potential probiotic aptitude of a de-replicated set of NSLAB previously isolated from long ripened Parmigiano Reggiano cheeses (22 Lactobacillus rhamnosus, 18 Lactobacillus paracasei, 3 Lactobacillus casei, 2 Lactobacillus harbinensis, and 2 Lactobacillus fermentum). Most strains showed moderate to good resistance to biological barriers, including bile salts, lysozyme, and simulated gastric and pancreatic juices. Antimicrobial susceptibility tests against seven antimicrobials belonging to different categories showed that most strains are susceptible towards all the antibiotics, with the exception of vancomycin and streptomycin. The strains lost the streptomycin resistance when assayed on agar medium containing 0.5% bile salts, suggesting that detergent-like properties of cholic acids increase membrane permeability and mediate streptomycin susceptibility. No isolate showed bile salt hydrolase (BSH) activities, supporting that bile salts resistance and BSH activity are unpaired traits. Finally, NSLAB strains had moderate to high auto-aggregative and hydrophobic phenotypes, whereas two subsets of 22 and 8 strains co-aggregated with Escherichia coli and Salmonella enterica s. typhimurium, respectively. A multivariate analysis was effective to segregate one L. casei and two L. rhamnosus strains showing physiological characteristics compatible with probiotic properties. CI - Copyright (c) 2013 Elsevier Ltd. All rights reserved. FAU - Solieri, Lisa AU - Solieri L AD - Department of Life Sciences, University of Modena and Reggio Emilia, via Amendola 2, Besta Building, 42122 Reggio Emilia, Italy. Electronic address: lisa.solieri@unimore.it. FAU - Bianchi, Aldo AU - Bianchi A FAU - Mottolese, Giovanni AU - Mottolese G FAU - Lemmetti, Federico AU - Lemmetti F FAU - Giudici, Paolo AU - Giudici P LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131017 PL - England TA - Food Microbiol JT - Food microbiology JID - 8601127 RN - 0 (Anti-Bacterial Agents) SB - IM MH - Anti-Bacterial Agents/pharmacology MH - Cheese/*microbiology MH - Lactobacillus/classification/drug effects/genetics/*isolation & purification MH - Principal Component Analysis MH - Probiotics/classification/*isolation & purification OTO - NOTNLM OT - Antibiotic susceptibility OT - Gastro-intestinal resistance OT - Lactobacillus OT - Non-starter lactic acid bacteria OT - Parmigiano Reggiano cheese OT - Principal component analysis OT - Probiotic EDAT- 2013/12/03 06:00 MHDA- 2014/07/10 06:00 CRDT- 2013/12/03 06:00 PHST- 2013/05/13 00:00 [received] PHST- 2013/10/04 00:00 [revised] PHST- 2013/10/07 00:00 [accepted] PHST- 2013/12/03 06:00 [entrez] PHST- 2013/12/03 06:00 [pubmed] PHST- 2014/07/10 06:00 [medline] AID - S0740-0020(13)00203-7 [pii] AID - 10.1016/j.fm.2013.10.003 [doi] PST - ppublish SO - Food Microbiol. 2014 Apr;38:240-9. doi: 10.1016/j.fm.2013.10.003. Epub 2013 Oct 17.