News on the use of animals, and their alternatives, in biomedical research. Covers animal models, primate studies, tissue chips, research ethics, and disease modeling.
Researchers discover piperlongumine (PL), extracted from long pepper, as a potent antiviral treatment for SARS-CoV-2. PL delays disease progression and reduces lung inflammation in mice infected with alpha, delta, and omicron variants, offering a potential solution to combat upcoming outbreaks.
A new study predicts that by 2099, future extreme heatwaves will expose up to 11% of land vertebrates to temperatures beyond their historical levels. However, a low-emissions scenario greatly reduces animals' exposure to heat extremes.
Researchers at Beckman Institute for Advanced Science and Technology will use a unique combination of MRI and mass spectrometry imaging techniques to study Alzheimer's disease on an unprecedented scale. By capturing detailed chemical information, they aim to understand the molecular-level changes that occur in aging brains and develop ...
A recent study found that DNA from domesticated chickens has been introgressing into the genomes of wild red junglefowl, leading to a loss of genetic diversity. The researchers estimate that wild birds have inherited 20-50% of their genomes from domestic chickens, which could make them less resilient to environmental changes.
Researchers found that echidnas blow bubbles from their nose to cool down, using the evaporation of moisture as an evaporative window. They also utilize flexible spines for insulation and lose heat through the spineless areas on their underside and legs, acting as thermal windows.
Researchers found that island tiger snake skulls increase in length after feeding on large prey, while mainland counterparts show no change. This adaptation allows them to survive on islands where large seabird chicks are abundant.
Scientists have mapped and analyzed DNA methylation profiles in 580 different animal species, providing insights into the evolutionary conservation of epigenetic mechanisms. The study reveals that DNA methylation constitutes a cancer-protective mechanism in large animals with long lifespans, contradicting Peto's paradox.
Researchers identified 92 proteins in the spider's venom, including cysteine-rich peptides with potential therapeutic applications. The toxins were found to be effective in paralyzing crickets and may become active ingredients for pharmaceuticals and biological insecticides.
Researchers found that p53 mutations in blood cells increase the risk of developing coronary heart disease and peripheral artery disease. The study provides solid evidence for the link between acquired p53 gene mutations and cardiovascular disease, suggesting a potential new risk factor.
A team of scientists from the USA conducted a study on toddlers' behavior towards helping dogs. The researchers found that children aged 2-3 years were twice as likely to help a dog reach a treat or toy when it showed interest, with factors such as the dog's liveliness and the object being a treat increasing the likelihood of assistance.
Researchers found a strong correlation between birds captured outside their expected range and geomagnetic disturbances. The study suggests that birds rely on magnetoreceptors for navigation, which can be affected by solar activity and other factors. This knowledge can help scientists understand threats to birds and the ways they adapt.
A new DNA-collection approach allows scientists to capture genetic information from wildlife without disturbing the animals. The protocol tested on elephant dung yielded enough DNA to sequence whole genomes not only of the elephants but also of associated microbes, plants, parasites and other organisms.
A study of 665 pet dogs found that life history, owner gender, and breed can influence canine behavior. The results highlight the importance of environmental interactions in shaping animal behavior, suggesting that traits like weight, height, and cranial morphology impact the dog-owner relationship.
Scientists have found that caterpillars can be used as an alternative to rodent models for studying gut inflammation, a risk factor for colorectal cancer. The tobacco hornworm caterpillar has a high degree of similarity to the human gut structure and physiology, making it a promising model organism for future research.
A Florida Atlantic University study found that urban noise exposure during development affects the color of songbirds' beaks, which influence social interactions and mate choice. Males developed less bright beak coloration, while females developed brighter orange coloration than untreated birds.
A new study provides insights into the conservation of eastern US migratory landbirds by identifying key stopover hotspots and habitat associations. The researchers found that small pockets of deciduous forest, particularly in areas with high concentrations of food and shelter, are crucial for birds to complete their migration.
Researchers used zebrafish to study an inflammatory lipid called 5-oxoETE, which plays a role in airway inflammation and neutrophil response. The study identified the 5-oxoETE/OXER1 pathway as an important immune pathway that may prevent some cancers.
Researchers at Iowa State University have identified a metabolic switch that can be modified to control fat production, which could lead to more effective treatments for childhood obesity and cancer. The discovery involves altering the acetylation levels of fatty acid synthase, an enzyme critical to de novo lipogenesis.
A new method utilizes an unnatural sugar to anchor cytokines to T cells, enhancing their functions without systemic side-effects. The approach has shown promise in stimulating the host immune system against tumor cells and inhibiting tumor growth in mice with melanoma.
Researchers have developed an innovative amputated human limb model to evaluate molecularly targeted fluorescent probes for human tissues. The model allows for controlled testing of imaging agents with zero risk to patients, improving the accuracy and safety of surgical procedures.
Researchers found that MMTV-NeuT/ATTAC mice treated with anti-PD-1 therapy developed increased tumor-associated macrophages, EMT, fibroblast proliferation, and enhanced extracellular matrix. These findings suggest potential therapeutic avenues to enhance PD-1 immune checkpoint sensitivity.
Researchers from Finland investigated the impact of wind turbines on bat presence and activity in boreal forests. Bats were found to be repelled by wind turbines, with Northern bats avoiding distances of up to 800 meters and Myotis species avoiding areas over one kilometer away.
A study found that the decline of black-tailed prairie dogs due to sylvatic plague, combined with abnormally high precipitation, led to dramatic ecosystem changes. The loss of prairie dog habitat caused declines in associated species such as birds, swift foxes, and coyotes.
A recent study by a transdisciplinary research team found ample evidence of the negative effects of light pollution on migrating animals, but also areas where more data is needed. The researchers concluded that there's a need for more data to help protect migrating animals, particularly species other than birds.
A study found that Ezo red foxes and Japanese raccoon dogs infected with HPAI virus had different outcomes due to varying diets. The fox died, while the raccoon dog survived but suffered damage to its eyes. The findings suggest that monitoring programs should be expanded to understand HPAI ecology and identify risk factors.
A study by Colorado State University found that over 10% of adult female golden-mantled ground squirrels are killed annually along rural roads in the Gunnison Valley. The researchers suggest reducing personal vehicle numbers and using digital signs to alert drivers, as males are also vulnerable during mating season.
Researchers studied deer and elk behavior around a wildlife tunnel, finding they were less likely to use the crossing after displaying a 'vigilant' response to passing vehicles. The study suggests designers should focus on animals' perceptions of their environment when building wildlife crossings.
Researchers at Hokkaido University identify a nerve pathway in the brain stem involved in processing rewarding and distressing stimuli, opposing a previously identified pathway. This finding could lead to developing drug treatments for mental disorders like addiction and major depression.
The article discusses the use of Rapamycin in the context of Pascal's Wager, a philosophical framework used to justify beliefs. ChatGPT's generative pre-trained transformer model provides an exhaustive research perspective on the pros and cons of taking Rapamycin for anti-aging purposes.
A study by Johns Hopkins Medicine researchers suggests that the brain's ability to focus on individual sounds amidst ambient noise declines with age, leading to a 'fuzzy' sound stage. The team trained old mice to filter out background sound, showing promise for treating age-related hearing loss.
A study published in Journal of Hepatology found that non-alcoholic fatty liver disease (NAFLD) can cause a decrease in oxygen supply to the brain and inflammation to brain tissue. The research identified Monocarboxylate Transporter 1 (MCT1) as a potential therapeutic target for protecting against NAFLD-induced brain dysfunction.
Researchers at Duke University discovered that glassfrogs store nearly 90% of their circulating red blood cells in their liver when they want to be transparent. This helps them blend in with their surroundings and avoid predation during the day.
Neuroscientists have uncovered a brain circuit that enables mice to rapidly escape to shelter when faced with a threat. The retrosplenial cortex and superior colliculus form a circuit that encodes the direction to a shelter, allowing mice to accurately orient and escape.
A study reveals many elephant values are often overlooked in conservation strategies, prioritizing economic and ecological benefits over moral ones. The research highlights the importance of considering diverse stakeholder value systems to create more sustainable conservation policies.
A rare fossil discovery provides new insights into the diet of Microraptor, a bird-like dinosaur with four wings. The find suggests that Microraptor was an opportunistic predator feeding on various species, including fish, birds, lizards, and small mammals.
A new study from the University of Copenhagen found that individuals with high empathy scores can accurately detect emotional sounds in animals, including arousal and valence. The study involved 1024 participants from 48 countries and showed a significant correlation between empathy for humans and understanding animal sounds.
A new study published in The Royal Society journal found that animals play a crucial role in reforestation by dispersing seeds into previously deforested areas. This natural regeneration approach is less costly and labor-intensive than traditional methods, offering a promising solution for restoring biodiversity and capturing carbon.
Australian scientists confirm that Theria (placental and marsupial mammals) evolved in Gondwana 50 million years ago before migrating to Asia. The discovery challenges long-held theories of mammal evolution.
Researchers have developed an edible plant-based ink derived from food waste to create cost-effective scaffolds for culturing meat. This innovation could significantly reduce the cost of large-scale cultured meat production, making it more affordable and environmentally friendly.
The report highlights that European taxonomic expertise is declining, with nearly half of insect orders not covered by sufficient scientists. The lack of expertise correlates with GDP and is more pronounced in biodiverse countries, posing significant problems for species conservation.
Researchers found that fleas with early-phase infection are insufficient to drive epizootic outbreaks but can promote a low level of enzootic plague. Early-phase transmission may help maintain the enzootic state by reducing susceptible individuals in the population.
In a groundbreaking study, researchers at Eötvös Loránd University have found that gland cells in Drosophila melanogaster can remove defective secretory particles as early as the secretion process begins. This discovery sheds new light on crinophagy, a previously understudied process crucial for maintaining cellular quality and function.
A new study uses drone-mounted technology to deter bats from flying into wind turbines, reducing fatalities by 40% and allowing turbines to operate efficiently. The device transmits ultrasonic signals and lights to warn bats of danger, leading them to fly over the turbine and out of harm's way.
A study by McGill University researchers found that Northern Tree Shrews' body size increased with warmer climates, contradicting Bergmann's rule. The team analyzed museum specimens and historical climate data, revealing a reversal of the Island rule as well, highlighting the complex interaction between ecological factors.
A new study synthesizes years of research on monarch habitat, finding that establishing habitat near crop fields with insecticide use will support breeding generations and increase population growth. The study suggests a 100-125 feet buffer is essential to add conservable land.
Researchers at Cornell University found that injecting apple juice, pulp, and pomace into chicken eggs improves the animal's intestinal health and boosts microbial populations. This innovative approach could reduce the use of added dietary chemicals and improve nutrition in broiler feed.
A team of researchers from the University of Adelaide has discovered the female snake clitoris, composed of nerves and red blood cells that may swell during mating. This finding counters the assumption that snakes' mating involves coercion rather than seduction.
Researchers tracked puffins with tracking devices, revealing they lose flying ability during 1-2 month molting period, making them vulnerable to severe weather conditions. The study suggests this timing is significant as climate change increases winter cyclones in the North Atlantic.
Researchers identified a single protein, FETUA-3, that inhibits a broad spectrum of rattlesnake venom toxins. The discovery may lead to the development of improved snake bite treatments and novel therapeutic options.
A new report by The Hastings Center recommends clearer ethics guidelines and enhanced oversight for human-animal chimera research, which raises questions about animal welfare and moral status. The report also highlights the potential benefits of this research, including better disease models and organ transplantation.
In a surprising twist, researchers found that starving Argentine ants exercise caution when foraging in high-risk environments, unlike expectations. This counterintuitive strategy may contribute to their success as an invasive species and agricultural pest.
Researchers at Cedars-Sinai found that estrogen can prevent symptoms of delirium in mice with urinary tract infections, reducing IL-6 levels in the blood and protecting neurons. The study suggests estrogen may be a tool to mitigate delirium, particularly in older women with UTIs.
Researchers at Karolinska Institutet discovered that SARS-CoV-2 infection triggers blood vessel formation in fat tissues, leading to thermogenic metabolism and significant weight loss. Blocking this process with an antiangiogenic drug restored weight loss in mice and hamsters infected with the virus.
Researchers found that while humans excel at categorizing interactions between humans, dogs, and monkeys, they struggle to predict aggressive behaviors in both species. Participants performed poorly on identifying aggression in dogs and humans, suggesting a potential bias towards assuming good intentions from others.
Scientists have identified two-million-year-old DNA fragments in northern Greenland's Ice Age sediment, providing insights into the past ecosystem and its potential to predict climate change. The discovery has sparked hopes that it could help academics build a picture of the DNA evolution of species still in existence today.
Researchers analyzed 2.3 million camera-trap photos of tropical mammals, revealing consistent daily activity patterns across continents. Body size and diet are key factors influencing activity, with larger animals active during the day and smaller ones at night.
A study of parrot vocal learning reveals species-specific differences in mimicking human speech, with some birds using words in context. Researchers also found that age and sex are weak predictors of vocal mimicry, highlighting the importance of conservation efforts for these complex communicators.
Researchers identify an off-patent liver disease drug that can prevent SARS-CoV-2 entry into cells, potentially offering protection against future variants. The study used a unique combination of 'mini-organs', animal studies, and human subjects to demonstrate the drug's effectiveness.
Researchers used mass spectrometry to analyze complex biological samples, including Salvia miltiorrhiza Bge and Astragali Radix. The studies identified metabolites and compounds with immunoregulatory effects, highlighting the potential for new drugs and improving plant quality.
A new study pinpoints the first-ever domestication of cats to nearly 10,000 years ago in the Fertile Crescent region. Genetic analysis reveals that humans' transition from hunter-gatherers to farmers sparked the bond between humans and rodents-eating cats, leading to their migration with humans worldwide.