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The Probiotic Lacticaseibacillus Rhamnosus SD11 Alleviates the Progression of Liver and Colon Damage Through Modulation of Inflammation and Tight Junction Proteins in Streptozotocin-induced Diabetic Mice

Overview
Journal PLoS One
Specialties General Medicine
Science
Date 2024 Nov 21
PMID 39570868
Authors
Waraporn Ruathong
Pissared Khuituan
Saranya Peerakietkhajorn
Rawee Teanpaisan
Jongdee Nopparat
Affiliations
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Abstract

Lacticaseibacillus rhamnosus SD11 (SD11) has several health benefits for the host, including antidiabetic, anti-inflammatory, and antimicrobial effects. However, the antidiabetic mechanism of SD11 has not been clearly elucidated. The current study assessed the effects of SD11 and the associated underlying mechanisms on streptozotocin (STZ)-induced diabetic mice. Compared with the normal control, SD11 supplementation for 4 weeks significantly improved the metabolic profiles, including body weight (BW), fasting blood glucose (FBG), fasting insulin level (FIN), and liver index (LI), in conjunction with a lower NAS score. A notable reduction in the liver function parameters aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) and total cholesterol (TC), together with histopathology studies, supported diabetic recovery by SD11. A closer examination of two major markers for the insulin pathway, insulin receptor (INSR) and insulin substrate (IRS)-1, revealed that SD11 could exert its glucose control through the upregulation of these molecules, which were almost demolished in nontreated diabetic livers. Additionally, SD11-treated mice exhibited alleviation of oxidative stress enzymes; downregulation of proinflammatory cytokines, including interleukin (IL)-6, IL-1β, tumor necrosis factor (TNF)-α, and interferon (IFN)-γ; and decreased infiltration of macrophages into liver tissue. These findings were concomitant with the preservation of the tight junction proteins occludin and zona occludin (ZO)-1, which in turn lowered the levels of the inflammatory cytokines IL-1β and TNF-α and prevented colon tissue injury to some extent. Notably, the results for the SD11 control mice were identical to those for the normal control mice. Overall, our findings that SD11 delays liver deterioration and reduces colon lesions in diabetic mice provide evidence for the use of SD11 as an effective strategy to improve diabetes-related symptoms.

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