This study investigated the therapeutic potential of probiotic bifidobacteria, isolated from Iranian fermented dairy products, in a hyperlipidemic animal model. Bifidobacterium strains were extracted from traditional dairy samples and screened using physiological and phenotypic examinations, 16S rRNA analysis, and probiotic properties such as tolerance to gastrointestinal juice, antimicrobial activity, and antibiotic susceptibility. The ability of the screened bifidobacteria to reduce serum and liver lipids in vivo was tested using male Wistar rats. Six strains of bifidobacteria were isolated from traditional Iranian fermented dairy. These strains showed promising in vitro activity in lowering triglyceride and cholesterol, tolerance to simulated gastrointestinal juice, the ability to adhere to Caco-2 cells, acceptable antibiotic susceptibility, and a broad spectrum of antibacterial activity. The diet supplemented with isolated bifidobacteria significantly reduced serum total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), liver tissue lipid levels, and hepatic enzymes in animals when compared to a high-fat diet without strains (p < 0.01). Additionally, the potential probiotic-supplemented diet significantly increased bile acid excretion in the feces and upregulated hepatic CYP7A1 expression levels (p < 0.05), while NPC1L1, ACAT2, and MTP gene expressions in small intestinal cells were downregulated (p < 0.05). Bifidobacteria isolated from Iranian traditional dairy showed potential for use in the production of fermented foods that have hypolipemic activity in the host.

• MeSH
• antibakteriální látky farmakologie   MeSH
• Bifidobacterium * genetika   izolace a purifikace   metabolismus   MeSH
• Caco-2 buňky MeSH
• cholesterol-7-alfa-hydroxylasa genetika   metabolismus   MeSH
• cholesterol krev   metabolismus   MeSH
• feces mikrobiologie   MeSH
• hyperlipidemie * MeSH
• játra metabolismus   MeSH
• krysa rodu rattus MeSH
• lidé MeSH
• mléčné výrobky mikrobiologie   MeSH
• modely nemocí na zvířatech MeSH
• potkani Wistar * MeSH
• probiotika * aplikace a dávkování   farmakologie   MeSH
• RNA ribozomální 16S genetika   MeSH
• triglyceridy krev   metabolismus   MeSH
• žlučové kyseliny a soli metabolismus   MeSH
• zvířata MeSH
• Check Tag
• krysa rodu rattus MeSH
• lidé MeSH
• mužské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Írán MeSH