We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Effects of repeated intragastric administrations with heat-inactivated Mycobacterium aurum DSM 33539 on the stress-induced aggravation of dextran sulfate sodium (DSS) colitis in C57BL/6N mice
Summary
Researchers tested whether a heat-inactivated preparation of the soil bacterium Mycobacterium aurum could protect mice from stress-aggravated intestinal inflammation. They found that oral administration of M. aurum reduced the severity of stress-induced colitis and helped maintain intestinal barrier integrity. The study suggests that certain beneficial environmental bacteria may help protect gut health under stressful conditions, though more research is needed.
Stress-protective effects have been reported for M. vaccae NCTC 11659 and M. vaccae ATCC 15483T. However, it remains to be investigated whether also closely related rapidly growing environmental saprophytic non-tuberculous mycobacteria (NTM) species have protective effects against the negative consequences of chronic psychosocial stress. Therefore, the aim of the current study was to assess whether repeated i.g. administrations of a heat-inactivated preparation of Mycobacterium aurum DSM 33539 prior to 19 days of chronic subordinate colony housing (CSC) are able to ameliorate the negative effects of this preclinically validated mouse model for chronic psychosocial stress on subsequent dextran sulfate sodium (DSS) colitis in male C57BL/6N mice. The results of the present study show that repeated i.g. administrations of M. aurum DSM 33539 have stabilizing effects on the composition of the gut microbiome, indicated by the findings that M. aurum DSM 33539 prevented CSC-induced increases in the relative abundances of the colitogenic phyla Desulfobacterota and Deferribacterota. Indeed, the relative abundance of Deferribacterota on day 19 was strongly correlated with histological damage to the colon. In line with the latter, M. aurum DSM 33539 was further protective against the aggravating effects of stress on subsequent DSS colitis. Collectively, our findings confirm and extend previous findings from our group and suggest that the stress-protective effects reported for M. vaccae NCTC 11659 and M. vaccae ATCC 15483T are generalizable also to other NTM species.
Sign in to start a discussion.
More Papers Like This
Effects of mixed lactic acid bacteria on intestinal microbiota of mice infected with Staphylococcus aureus
Researchers found that infection with Staphylococcus aureus, a common harmful bacterium, disrupts the normal balance of gut microbiota in mice, but that treatment with a mix of beneficial lactic acid bacteria (LAB) — similar to probiotics — helped prevent the infection and restore a healthier gut microbial community. This highlights the potential of probiotic bacteria to protect gut health against pathogenic disruption.
Agrocybe cylindracea Polysaccharides Ameliorate DSS-Induced Colitis by Restoring Intestinal Barrier Function and Reprogramming Immune Homeostasis via the Gut–Liver Axis
Researchers investigated whether polysaccharides from the edible mushroom Agrocybe cylindracea could alleviate colitis in a mouse model. They found that oral administration of the polysaccharides significantly reduced disease symptoms, restored intestinal barrier integrity, and reshaped gut microbiota composition by promoting beneficial bacteria. The study positions these mushroom polysaccharides as a potential natural therapeutic that works through multiple pathways including immune modulation and gut-liver axis signaling.
Protocatechuic Acid Alleviates Dextran-Sulfate-Sodium-Induced Ulcerative Colitis in Mice via the Regulation of Intestinal Flora and Ferroptosis
Researchers found that protocatechuic acid, a naturally occurring compound found in many fruits and vegetables, helped alleviate ulcerative colitis in mice by restoring healthy gut bacteria and reducing a type of cell death called ferroptosis. The treatment improved intestinal barrier integrity and reduced inflammation. This is relevant to microplastics research because gut barrier damage is a key concern with microplastic ingestion.
Lactobacillus plantarum A3 attenuates ulcerative colitis by modulating gut microbiota and metabolism
Researchers showed that Lactobacillus plantarum A3, a probiotic strain isolated from horses, reduced symptoms of ulcerative colitis in mice whose gut microbiomes had been disrupted by antibiotics. The probiotic restored beneficial bacteria like Akkermansia, reduced gut inflammation, and increased levels of natural anti-inflammatory compounds in the body.
A probiotic for preventing microplastic toxicity: Clostridium dalinum mitigates microplastic-induced damage via microbiota-metabolism-barrier interactions
Using metagenomics and metabolomics, this study found that the probiotic bacterium Clostridium dalinum reduced microplastic-induced gut damage in mice by modulating gut microbiota composition, metabolic pathways, and intestinal barrier integrity.