The present invention relates to a composition comprising a given Lactobacillus rhamnosus strain and a given Lactobacillus paracasei strain wherein the ratio of the given Lactobacillus rhamnosus strain to the given Lactobacillus paracasei strain (LRα:LPα) is higher or equal to 8:1 and to methods thereof.

The application discloses Lactobacillus strains having a beneficial effect on the metabolic health on a mammalian subject. Further disclosed is compositions comprising such strains and the use thereof for improving the metabolic health or for lowering the blood glucose level in a mammalian subject.

A novel Lactobacillus paracasei AO356 strain according to the present disclosure, which is a strain isolated from the human body, has high stability, exhibits the activity of inhibiting adipogenic differentiation in vitro and inducing the differentiation of M1 and M0 macrophages into M2 macrophages, and has excellent activity of alleviating, preventing, or treating obesity, such as the activity of reducing body weight and a reduction in blood lipid concentration through the browning of white fat in animal experiments. Thus, the novel strain of the present disclosure has a low possibility of causing side effects, and therefore, unlike conventional diet functional foods or drugs, which have side effect problems, a diet effect can be exhibited without controlling the dose thereof. Accordingly, the novel strain can be used as a pharmaceutical composition for treating or preventing obesity or a food composition for alleviating or preventing obesity.

The present invention provides novel Lactobacillus sp. strains, novel Bifidobacterium sp. strains, or lactic acid bacteria mixtures thereof, which are isolated from kimchi or human feces. A certain Lactobacillus sp. strain or certain Bifidobacterium sp. strain according to the present invention is isolated from kimchi or human feces, and thus is highly safe, and has various physiological activities such as antioxidant activity, β-glucuronidase inhibitory activity, lipopolysaccharide (LPS) production inhibitory activity or tight junction protein expression-inducing activity. Accordingly, a certain Lactobacillus sp. strain, certain Bifidobacterium sp. strain or mixture thereof according to the present invention may be used as a functional food or medicinal material useful for the prevention, alleviation or treatment of intestinal damage, liver injury, allergic disease, inflammatory disease, or obesity.

The present invention relates to a certain microorganism for altering the composition of oral biofilms, in particular for use in the treatment and/or prevention of dental caries and/or periodontal disease. In particular, the present invention relates to a microorganism for use as a probiotic agent for altering the bacterial composition of oral biofilms derived from saliva, preferably for reducing the proportions of Gram-negative anaerobic genera and/or increasing the proportions of aerobic or facultatively anaerobic genera. Furthermore, the present invention provides oral pharmaceutical compositions, oral care products or products for nutrition or pleasure comprising the microorganism as probiotic agents as well as a method of production thereof.

The present invention provides an active substance of Lactic Acid Bacteria, a composition comprising thereof and its use for promoting longevity, especially for increasing Cisd2 gene expression, reducing mitochondrial damage and delaying aging conditions such as nerve degeneration and sarcopenia.

The present invention provides a method for producing a fermented food, comprising: a fermentation step of fermenting a raw material milk-containing milk preparation solution added with Lactobacillus delbrueckii and Streptococcus thermophilus carrying a prtS gene.

A food composition is disclosed which comprises the acid-resistant bacterial strain Lactobacillus acetotolerans LE36. The L. acetotolerans LE36 strain has anti-inflammatory properties. The food composition can be further provided as a pharmaceutical composition.

The present disclosure relates to the technical field of microorganisms, in particular to Lactobacillus gasseri HMV18 and an exocrine protein and an application thereof. The Lactobacillus gasseri HMV18 is preserved in the China Center for Type Culture Collection on Jul. 11, 2019 with a preservation number of CCTCC NO: M 2019538, and a preservation address of Wuhan University, Wuhan, China. The protein extracted from the Lactobacillus gasseri HMV18 has antibacterial and anti-tumor effects, but basically has no effect on normal myocardial cells, so the Lactobacillus gasseri HMV18 can be applied to preparation of antibacterial and anti-tumor products.

A probiotic for inhibiting and preventing the progression of a renal disease and a composition containing the same are disclosed. The probiotic contains a novel Lactobacillus acidophilus BP105 strain, a novel Lactobacillus salivarius BP121 strain. The novel probiotics, the Lactobacillus acidophilus BP105 strain and the Lactobacillus salivarius BP121 strain exhibit excellent indoxyl sulfate removal ability, p-cresol removal ability, and phosphorus absorption ability.