Bile salt hydrolase: The complexity behind its mechanism in relation to lowering-cholesterol lactobacilli probiotics
2024
Gianluigi Agolino | Alessandra Pino | Amanda Vaccalluzzo | Marianna Cristofolini | Lisa Solieri | Cinzia Caggia | Cinzia Lucia Randazzo
Bile Salt Hydrolase (BSH) is a bacterial enzyme (EC 3.5.1.24) that initiates the crucial deconjugation of bile acids (BAs), a process necessary for their transformation into secondary BAs by gut microbes. Recent advance has delved deeper into BAs, recognizing them as endocrine molecules capable of modulating lipid and sugar metabolism in the host.In this review, we elucidate how this wealth of research has broadened our understanding about the intricate mechanisms between BAs and the gut microbiota beyond BSH, underlying the hypocholesterolemic effects of probiotic lactobacilli. We highlight the expanded range of various species of lactobacilli with proven cholesterol-lowering activity both in vitro and in vivo associated with BSH activity. In addition, a summary of genomic and metagenomic studies investigating bsh genes in both gut microbiota and lactobacilli is provided, to be used as an additional tool for the selection of a potential lactobacilli probiotic.
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