Effects of Lactobacillus casei NCU011054 on immune response and gut microbiota of cyclophosphamide induced immunosuppression mice

• Published in: Food and chemical toxicology Vol. 174; p. 113662
• Main Authors: Min, Fangfang, Hu, Jielun, Huang, Tao, Huang, Yousheng, Nie, Shaoping, Xiong, Tao, Xie, Mingyong
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.04.2023
• Subjects: Animals; Cyclophosphamide - pharmacology; Cytokines - metabolism; Gastrointestinal Microbiome; Gut microbiota; Immunity; Immunoregulation; Immunosuppression Therapy; Interleukin-4 - metabolism; Intestinal Diseases; Lacticaseibacillus casei; Lactobacillus casei NCU011054; Metabolites; Mice; NF-kappa B - metabolism; Th1/Th2 balance; Gut microbiota; Metabolites; Immunoregulation; Th1/Th2 balance; Lactobacillus casei NCU011054
• ISSN: 0278-6915; 1873-6351
• DOI: 10.1016/j.fct.2023.113662

Lactobacillus (L.) casei NCU011054 isolated from infant feces has been proven to be a potential probiotic in vitro. The present study aimed to investigate the effects of L. casei NCU011054 on the immune response and gut microbiota in cyclophosphamide (CP)-induced immunosuppression mice. Results indicated that L. casei NCU011054 could increase the levels of mucin (Muc2) and tight junction proteins (ZO-1, occludin and claudin-1). Moreover, L. casei NCU011054 was found to upregulate TLRs/NF-κB pathway (TLR-2, TLR-4, TLR-6, p65 and NF-κB) and two transcription factors (T-bet and GATA-3) mRNA levels, and enhance the number of CD4+T cells. Th1-related cytokines (IL-12p70, IFN-γ and TNF-α) and Th2-related cytokines (IL-2, IL-4, IL-6 and IL-10) significantly increased after L. casei NCU011054 treatment. More importantly, L. casei NCU011054 increased the ratio of T-bet to GATA-3 and IFN-γ to IL-4. Apart from these, L. casei NCU011054 remodeled gut microbiota and modulated gut metabolites in CP-induced immunosuppressed mice. The correlation analysis showed that Lactobacillus upregulated by L. casei NCU011054 was positively correlated with TLRs/NF-κB pathway, and the ratio of T-bet to GATA-3 and IFN-γ to IL-4. All findings revealed that L. casei NCU011054 could improve intestinal immune dysfunction and modulate Th1/Th2 balance via TLRs/NF-κB pathway in CP-induced immunosuppressed mice. [Display omitted]