Topic
Microbial metabolism in the intestine, including the shift from fiber to protein fermentation and its health consequences.
UCLA researchers scanning nearly 1,500 adults tied older-looking brains to specific gut bacteria in the one group that also gave stool samples. That makes the gut a lead for follow-up studies, though an association cannot show that changing gut bacteria would slow brain aging.
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John Cryan's lab at University College Cork found only the decaf half of 31 coffee drinkers improved on two memory tests. Cryan suspects gut microbes, but the blinded trial ties them to the result without showing they caused it.
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UW-Madison researchers linked higher blood levels of the gut-made compound ImP to faster cognitive decline in nearly 1,200 people. Evidence that ImP causes harm so far comes from mice, so lowering it to slow dementia is still an idea for the future.
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Petter Brodin's team found 39% of infants with a strong first-week immune 'seeding' reaction had eczema or food allergy by age 1, against 12% of the rest. The data, from nearly 600 Swedish babies, tie the risk to gut bacteria and feeding, and would put any prevention window within days of birth if the link proves causal.
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Memorial Sloan Kettering researchers found each extra 100g of sugary food on antibiotics went with an average 24% bigger gut-diversity drop in 158 patients. Mouse experiments point to sugar feeding a pathogen bloom, though the patient result is an association drawn from hospital meal logs.
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Mayo Clinic researchers tie colorectal and breast cancers diagnosed at 50 or younger to distinct gut microbes, using stool from 1,364 patients. The signals give researchers named bacteria to test next, though the data cannot yet say whether those microbes drive early disease or follow from it.
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University College Cork researchers report that 31 habitual coffee drinkers scored lower on stress and depression once coffee returned, decaf or not. Gut microbe and metabolite differences make a gut-brain route plausible, though arms of about 15 people keep it an association.
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University of Copenhagen researchers found blood signs of gut bacteria fermenting more protein in 52 ISS astronauts within weeks of reaching orbit. The team suspects slower digestion and says Mars crews may need countermeasures, though blood chemistry alone cannot confirm the cause.
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Penn State found age reshaped the resistance genes of 320 broiler chickens far more than antibiotic, probiotic or essential-oil feed did. With the antibiotic diet also flat, the three-week trial cannot show the alternatives reduce resistance.
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Researchers in Japan engineered gut E. coli to make or withhold putrescine, and the producing strains raised male fly lifespan to 13.8 days from 11.0. The design isolates a microbial metabolite as a cause, though the effect broke down in females.
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Gut phage therapy usually fails because you cannot get enough phage to enough bacteria in time. A team writing in Nature Microbiology built a resident E. coli that makes the phage on site, and it protected mice against an oral Salmonella challenge.
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Kyushu University fed shoreline isopods nothing but polystyrene board for a week and found the effect in their gut transcriptomes rather than in their survival, which puts real weight on the choice of control group.
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Rather than wait for experimental libraries to fill, the Cornell and BTI tool indexes a chemical space roughly a thousand times wider. What a query returns is a candidate structure rather than a confirmed one.
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A Universidad de Chile team gave 47 mice sweetened water at everyday doses and tracked two unexposed generations. Glucose handling shifted by sex and by line, and the metabolite drop is the part worth chasing.
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Stool samples linked to prescription records for more than 2,500 people showed lasting signatures from antidepressants, beta-blockers, acid reducers and benzodiazepines. Current-medication controls miss those.
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A NASA-backed study of 52 ISS crew members found gut bacteria switching to protein fermentation within weeks of launch, producing compounds the authors tie to kidney and cognitive harm.
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