AUTHOR=Arzola-Martínez Llilian , Ravi Keerthikka , Huffnagle Gary B. , Lukacs Nicholas W. , Fonseca Wendy 

TITLE=Lactobacillus johnsonii and host communication: insight into modulatory mechanisms during health and disease

JOURNAL=Frontiers in Microbiomes

VOLUME=2

YEAR=2024

URL=https://www.frontiersin.org/journals/microbiomes/articles/10.3389/frmbi.2023.1345330

DOI=10.3389/frmbi.2023.1345330

ISSN=2813-4338

ABSTRACT=<p><italic>Lactobacillus johnsonii</italic> is a commensal bacterium that has been isolated from vaginal and gastrointestinal (GI) tracts of vertebrate hosts, including humans, rodents, swine, and poultry. <italic>Lactobacillus</italic>-based probiotic supplements are popular because of the health advantages they offer. Species such as <italic>L. johnsonii</italic> are particularly interesting due to their potential health-promoting properties. Here, we reviewed the research on specific strains of <italic>L. johnsonii</italic> that have been studied in the context of health and disease and delved into the underlying mechanisms that aid in preserving host homeostasis. The utilization of <italic>L. johnsonii</italic> strains has been widely linked to numerous health benefits in the host. These include pathogen antagonism, control of mucosal and systemic immune responses, reduction of chronic inflammation, modulation of metabolic disorders, and enhanced epithelial barrier. These findings suggest that <italic>L. johnsonii</italic> plays a critical role in maintaining host homeostasis, highlighting its potential as a probiotic.</p>