Background: Ulcerative colitis is a subtype of inflammatory bowel disease, characterized by relapsing inflammation in the gastrointestinal tract with limited treatment options. Previous studies suggested that the natural compound tricin, a flavone isolated from rice bran, could suppress chemically-induced colitis in mice, while our recent study also demonstrated the anti-metastatic effect of tricin in colon tumor-bearing mice.
Hypothesis/purpose: Here we further investigated the underlying mechanism of the inhibitory effects of tricin on lipopolysaccharides-activated macrophage RAW264.7 cells and explored the efficacy of tricin in acute colitis mouse model induced by 4.5% dextran sulfate sodium (DSS) for 7 days.
Methods: Tricin (75, 100, and 150 mg/kg) or the positive control drug sulfasalazine (200 mg/kg) were orally administered to mice for 7 days. Stool consistency scores, stool blood scores, and body weight were recorded daily. Disease activity index (DAI) was examined on day 7, and colon tissues were collected for biochemical analyses. The fecal microbiome of colitis mice after tricin treatment was characterized for the first time in this study using 16S rDNA amplicon sequencing.
Results: Results showed that tricin (50 µM) remarkably reduced nitric oxide production in lipopolysaccharides-activated RAW264.7 cells and the anti-inflammatory activity of tricin was shown to act through the NF-κB pathway. Besides, tricin treatment at 150 mg/kg significantly reversed colon length reduction, reduced myeloperoxidase activities and DAI scores, as well as restored the elevated myeloid-derived suppressive cells population in acute colitis mice. The influence from DSS on gut microbiota, such as the increased population of Proteobacteria phylum and Ruminococcaceae family, was shown to be relieved after tricin treatment.
Conclusion: Our present study firstly demonstrated that tricin ameliorated acute colitis by improving colonic inflammation and modulating gut microbiota profile, which supports the potential therapeutic use of tricin for colitis treatment.
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http://dx.doi.org/10.1016/j.phymed.2021.153625 | DOI Listing |
Pharmaceuticals (Basel)
January 2025
MOE Key Laboratory of Marine Drugs, MOE Key Laboratory of Evolution & Marine Biodiversity, School of Medicine and Pharmacy, Institute of Evolution & Marine Biodiversity, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
: Ulcerative colitis (UC), a chronic inflammatory bowel disease (IBD), is characterized by colorectal immune infiltration and significant microbiota compositional changes. Gut microbiota homeostasis is necessary to maintain the healthy state of humans. MR2938, a quinazolin-4(3H)-one derivative derived from the marine natural product penipanoid C, alleviated DSS-induced colitis in a dose-dependent manner.
View Article and Find Full Text PDFPharmaceuticals (Basel)
December 2024
Postgraduate Program in Natural and Synthetic Bioactive Products, Health Sciences Center, Federal University of Paraíba (UFPB), João Pessoa CEP 58051-970, PB, Brazil.
Background: (-)-Fenchone is a bicyclic monoterpene present in the plant species Mill, L. (tuja), and (lavender). These plants have therapeutic value in the treatment of intestinal disorders.
View Article and Find Full Text PDFJ Clin Med
January 2025
Department of Pathology, Ghent University Hospital, Ghent University, 9000 Ghent, Belgium.
: Gastrointestinal diseases are a major cause of morbidity in common variable immunodeficiency disorder (CVID), clinically often mimicking other conditions including celiac disease and inflammatory bowel disease (IBD). Hence, diagnosis of CVID remains challenging. This study aims to raise awareness and highlight histopathological clues for CVID in intestinal biopsies, emphasizing diagnostic pitfalls for the pathologist/gastroenterologist.
View Article and Find Full Text PDFJ Clin Med
January 2025
College of Pharmacy, King Saud Bin Abdulaziz University for Health Sciences, Riyadh 11461, Saudi Arabia.
Owing to the growing use of immune checkpoint inhibitors (ICIs) in the treatment of cancer, a wide spectrum of toxicity has arisen among cancer patients. Yet, limited ICI toxicity-related research is currently conducted in our region. This is a retrospective observational study conducted on adult cancer patients who received at least one cycle of ICI single therapy.
View Article and Find Full Text PDFMicroorganisms
December 2024
Gastroenterology and Endoscopy IRCCS, Ospedale San Raffaele, 20132 Milano, Italy.
Acute severe ulcerative colitis (ASUC) often requires surgical intervention, such as proctocolectomy with ileal pouch-anal anastomosis (IPAA). While IPAA improves patient outcomes, it can be associated with pouchitis, a common and debilitating complication characterized by inflammation of the pouch. The development of pouchitis is closely linked to dysbiosis-an imbalance in the gut microbiota.
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