Deciphering Beneficial Health Promoting Properties of Lactic Acid Bacteria Isolated From Infant Gut Microbiome

Aim and Objective: To evaluate the probiotic potenties along with safety of probiotics within infant faecal origin. Methods and Results: The present study isolates lactic acid bacteria from infant feces were characterized and identified by 16S rRNA sequencing. On evaluation of in vitro probiotic capability, the test isolates exhibited in vitro probiotic potency, antagonistic property and better cell surface properties. The Bile salt hydrolase activity, cholesterol assimilation, antioxidant activity and angiotensin converting enzyme inhibitory action of the test isolates proves their health conferring potency. Standard protocols were used for the estimation of lymphocyte proliferation rate, phagocytosis rate, cytokine response and faecal enzyme levels. Animal experiment using different doses of L. plantarum (MBTU-S1B) substantiated its immunotolerance against inhibitory effects of supraoptimal concentration of both T and B cell mitogens with significant reduction on β-Glucosidase and Nitroreductase activity with p< 0.05, while contrasting effect was noticed for β-Glucuronidase. Findings of the in vivo study proved higher dose of probiotic would not provide any additional benefit on host body. Conclusions: The test isolates possesed in vitro probiotic potency and the in vivo study with MBTU- S1B proved their applicability in nutraceutical and pharmaceutical industries. Significance and Impact of Study: To conflict disease outbreaks by improving general immunity via probiotics.