This article contains findings obtained from research on animals:
- The results from animal research studies should not be directly applied to humans and the results may not generalise to the human population.
- There may be significant differences between species in terms of physiology, physiology, and pharmacology, as well as differences in the way diseases and treatments are modelled in animals.
- Any conclusions drawn from animal research should be considered with caution and in the context of other types of research studies such as observational studies, clinical trials, and reviews of the literature.
Insights & Discussion
A polysaccharide from Tremella aurantialba improves ulcerative colitis symptoms by targeting epithelial cell ferroptosis and modulating the gut microbiota.
The methodology used in this research involved isolating TA 2-1, a specific polysaccharide from Tremella Aurantialba, and studying its effects on ulcerative colitis. This was done by introducing it to Caco-2 cells that were undergoing ferroptosis and assessing its impact on cell viability. The influence of TA 2-1 was also examined in mice with artificially induced ulcerative colitis, verifying its ameliorating effects in an in-vivo context. The structure of TA 2-1 and its components were analysed and the polysaccharide's interaction with gut microbiota was explored to understand how it might modulate symptoms or prevent cell death.
The results of this study showed that TA 2-1 does not only decrease the rate of cell death in epithelial cells undergoing ferroptosis, but it also repairs the intestinal barrier by upregulating specific proteins such as claudin-1 and zonula occludens-1. TA 2-1 was also found to suppress lipid peroxidation, thus inhibiting ferroptosis. Further investigation revealed that TA 2-1 may alleviate ulcerative colitis by influencing the composition or metabolites of gut microbiota. This research offers promising insight into the potential of TA 2-1 in treating ulcerative colitis.
Discover Related Insights
Chinese herbal medicines could potentially relieve ulcerative colitis by moderating the gut microbiota and intestinal immunity loop.
2023 Chinese Herbal Medicines Chinese herbal medicines for treating ulcerative colitis via regulating gut microbiota-intestinal immunity axis Yang Y, Wang Y, Zhao L, Wang F, Li M, Wang Q, et al.
Review Article Gut Microbiota Ulcerative Colitis
The study emphasizes on the possible use of Chinese herbal medicines, which include single herbs, herbal formulas and derived constituents, in treating ulcerative colitis (UC), a recurring inflammatory bowel disease. With a focus on how these medicines interact with and modify the gut microbiota, the mechanism involves regulating the intestinal homeostasis to counter UC. It deals with balancing microbial dysbiosis, or the imbalance of microbes in the body, and abnormal gut immunity, two key initiators of inflammatory responses in UC.
The paper reviews several clinical trials which have been conducted, all exhibiting the effectiveness of Chinese herbal medicines on patients diagnosed with UC. In the trials, these derived substances have shown a protective effect against UC, offering the potential possibility of them being explored as conventional methods of UC treatments in the future. Not every trial has resulted in absolute success, but the overall results are promising and indicate a robust potential direction for UC treatment science.
Oral administration of Tremella fuciformis polysaccharides may constitute a new, effective therapy for Atopic dermatitis, improving both immune response and intestinal microbiota.
2022 Frontiers in Pharmacology Tremella fuciformis polysaccharides alleviate induced atopic dermatitis in mice by regulating immune response and gut microbiota Xie L, Yang K, Liang Y, Zhu Z, Yuan Z, Du Z
Experimental Study Eczema Gut Microbiota Polysaccharides
In the methodology of this study, the therapeutic effects of Tremella fuciformis polysaccharides (these have multiple biological activities), on Atopic dermatitis, were examined through both topical application and oral administration on mice induced with Atopic dermatitis-like disorder. The changes across transdermal water loss, epidermal thickening, and ear edema in the affected mice were observed. Notably, the study also considered the polysaccharides' impacts on the proportion of specific regulatory T cells in the mesenteric lymph nodes of the mice.
The results showed that both therapeutic methods positively impacted the conditions of the affected mice, with oral administration offering superior efficacy over topical application. The oral administration of the polysaccharides led to an increase of specific regulatory T cells, evidence of immune regulation. Further, non-targeted metabolomics and sequencing of certain DNA amplicons pointed towards observable modulation in fecal metabolites and a changed composition of gut microbiota in the mice following the oral treatment.
Tremella fuciformis polysaccharides effectively reduce inflammation in ulcerative colitis, promoting healing by restoring intestinal and mucus barrier functions.
2021 International Journal of Biological Macromolecules Tremella fuciformis polysaccharides ameliorated ulcerative colitis via inhibiting inflammation and enhancing intestinal epithelial barrier function Xu Y, Xie L, Zhang Z, et al
Experimental Study Intestinal Barrier Polysaccharides Ulcerative Colitis
In this study, two models were utilized to investigate the impacts of Tremella fuciformis polysaccharides on ulcerative colitis: a dextran sodium sulfate-induced mice model and a lipopolysaccharide-stimulated model using Caco-2 cells. First, the dextran sodium sulfate-induced mice ulcerative colitis model was administered with the Tremella fuciformis polysaccharides. Effects were observed across several indicators such as body weight, colon length, and thickness, as well as intestinal permeability.
Following that, histopathological analysis and electron microscope examinations helped delve deeper into the relationship, uncovering a reduction in inflammatory cell infiltration and a restoration of the intestinal epithelial barrier integrity. The lipopolysaccharide-stimulated Caco-2 cells model was used to further understand the role of these polysaccharides in reducing expressions of pro-inflammatory cytokines and increasing expressions related to intestinal barrier and mucus barrier.