tldrdailynews.com logo
Tag

Mice

All articles tagged with #mice

Big Rewards Fast-Track Learning by Extending Dopamine Signals
science4 days ago

Big Rewards Fast-Track Learning by Extending Dopamine Signals

A study from HHMI’s Janelia shows that larger rewards speed learning in mice by boosting and prolonging dopamine signals, which enhances retention per repetition, day-to-day memory carryover, and especially engagement. This reduces variability between individuals and compresses training from days to hours, with perfect mastery possible in under 48 hours, potentially reshaping how neuroscience research trains animals and investigates complex cognition.

via Neuroscience News|
#dopamine#learning-speed#mice
A SIRT6 boost reverses much of age-linked liver chromatin changes in old mice
science5 days ago

A SIRT6 boost reverses much of age-linked liver chromatin changes in old mice

Bar-Ilan researchers showed that increasing SIRT6 levels specifically in the liver of 24‑month‑old male mice reversed about 80% of age-related chromatin accessibility changes within one month, with downstream inflammatory and metabolic gene programs moving toward a youthful pattern. The intervention used a hepatocyte-targeted viral vector and yielded tissue- and mechanism-specific reversal, not a universal rejuvenation. While scientifically significant for chromatin dynamics and aging biology, translating this to humans would require substantial further work, safety testing, and validation; the broader implications for human longevity are modest and long-term, not an immediate anti-aging breakthrough.

via Space Daily|
#aging#chromatin#liver
Colorado Records Its First hantavirus Death Since 2024 Amid Spring-Rodent Advisory
health6 days ago

Colorado Records Its First hantavirus Death Since 2024 Amid Spring-Rodent Advisory

Colorado reports its first hantavirus death since 2024, linked to the local Sin Nombre strain with preliminary evidence of local rodent exposure; officials say the overall risk to the public remains low but urge precautions during spring cleaning, as the virus can incubate up to six weeks and may cause severe lung disease if inhaled from rodent droppings or nests.

via Gizmodo|
#colorado#hantavirus#health
Brains Start Dense, Then Prune: Mouse Study Rewrites Blank-Slate Idea
science18 days ago

Brains Start Dense, Then Prune: Mouse Study Rewrites Blank-Slate Idea

A mouse study from ISTA shows the hippocampal CA3 network is densely connected and seemingly random at birth, then prunes into a more structured circuit as the animal matures. This supports a pruning model where the brain is born “full” and optimized over time, potentially enabling faster integration of sensory information, though it’s not yet clear if humans follow the same pattern. The findings come from developmental stages spanning birth to adulthood and were published in Nature Communications.

via ScienceAlert|
#brain-development#hippocampus#mice
Carbs May Trigger Fat Gain by Altering Metabolism, Mouse Study Finds
science1 month ago

Carbs May Trigger Fat Gain by Altering Metabolism, Mouse Study Finds

Osaka Metropolitan University researchers showed mice strongly preferred carb-rich foods (bread, wheat, rice), stopped eating regular chow, and gained body fat without a calorie increase. The weight gain was driven by reduced energy expenditure and metabolic changes in the liver rather than overeating; removing wheat flour reversed the effects, suggesting carb quality and dietary patterns matter. The team plans human studies to explore whole vs refined grains, dietary fiber, and meal timing on metabolism and weight.

via SciTechDaily|
#carbohydrates#metabolism#mice
Neuronal lipid droplets coordinate whole-body energy balance with male-biased effects across species
science1 month ago

Neuronal lipid droplets coordinate whole-body energy balance with male-biased effects across species

The study shows neuronal lipid droplets (nLDs) exist in vivo in both flies and mice; their formation is regulated by triglyceride metabolism enzymes and LD-associated proteins. Modulating nLDs produces conserved, male-biased effects on whole-body energy homeostasis, particularly in neurons that link environmental cues to energy balance. Mechanistically, nLD-derived lipids supply fatty acids and phospholipids to support mitochondrial and endoplasmic reticulum function, highlighting a conserved role for nLDs in coordinating neuronal lipid supply and demand for healthy energy regulation.

via Nature|
#drosophila#energy-homeostasis#mice
Carbs That Don’t Add Calories May Slow Metabolism and Boost Weight in Mice
health1 month ago

Carbs That Don’t Add Calories May Slow Metabolism and Boost Weight in Mice

A mouse study found a strong preference for carbohydrate-rich foods like bread and rice can cause weight gain and higher fat without increasing total calories, due to reduced energy expenditure and metabolic changes in the liver. Removing wheat flour from the diet improved weight and metabolic health, suggesting carbs influence weight beyond calorie count and warrant human studies on whole grains, fiber, and processing effects.

via ScienceDaily|
#carbohydrates#health#metabolism
Single-Dose Frog-Derived Bacterium Trims Tumors Completely in Mice
science1 month ago

Single-Dose Frog-Derived Bacterium Trims Tumors Completely in Mice

A bacterium isolated from frog gut, Ewingella americana, was given intravenously to mice with colorectal cancer and achieved a 100% complete tumor remission by both directly killing cancer cells and activating an anti-tumor immune response, outperforming some conventional therapies in this model; the bacterium selectively accumulates in tumors, clears rapidly from the bloodstream, and shows no lasting toxicity to healthy organs, suggesting a novel biodiversity-derived approach with potential for other cancers.

via SciTechDaily|
#bacteria#cancer#immunotherapy
CBD and CBG Reprogram Liver Energy to Reverse Fatty Liver in Mice
health1 month ago

CBD and CBG Reprogram Liver Energy to Reverse Fatty Liver in Mice

Israeli researchers found that non-psychoactive cannabis compounds CBD and CBG can reverse liver damage in obese mice with MASLD by reprogramming liver energy use, boosting phosphocreatine reserves and lysosomal activity, and improving insulin resistance and lipid profiles. The treated mice showed reduced fat accumulation and inflammation without dietary changes, suggesting a new metabolic pathway to target in MASLD. However, these results are preclinical, and human relevance requires careful dosing considerations and clinical trials, as consumer CBD/CBG products vary in purity and concentration.

via Daily Mail|
#cbd#cbg#fatty-liver
New gut microbe from Mediterranean diet shown to boost mouse strength
health1 month ago

New gut microbe from Mediterranean diet shown to boost mouse strength

Researchers find that a Mediterranean-diet–associated gut bacterium, Roseburia inulinivorans, correlates with higher grip strength in humans and, when fed to mice, increases grip strength by about 30% over 4–8 weeks and shifts muscle fibers toward a stronger, fast-twitch type. The study suggests potential probiotic or drug approaches to combat frailty, but human trials are needed and delivering such an anaerobic microbe in pill form remains a hurdle; the work was published in Gut and underscores the gut-muscle connection.

via Live Science|
#gut-microbiome#health#mediterranean-diet