News on the use of animals, and their alternatives, in biomedical research. Covers animal models, primate studies, tissue chips, research ethics, and disease modeling.
Repeated sexual rejection in fruit flies causes social stress, leading to increased aggression and reduced resilience to starvation and toxic herbicide exposure. The response is mediated by the brain's neuropeptide F signaling system, which also plays a role in reward- and stress-responses in other organisms.
The study identifies Morro do Príncipe as a priority area for conservation of the endangered Johngarthia lagostoma land crab in Brazil. Praia dos Andradas is also considered vital for breeding. The researchers highlight the importance of preserving vegetation to ensure the species' survival.
A recent study at The Hebrew University of Jerusalem documented a groundbreaking observation of phoresy involving a myrmecophile pseudoscorpion on a myrmecophile scorpion. The study reveals the first recorded instance of this symbiotic relationship, where the pseudoscorpion attaches to the scorpion for dispersal into new environments.
A study published in Applied Animal Behaviour Science found that dogs are most engaged when watching videos featuring other animals, with content featuring other dogs being the most popular. The research aims to improve the assessment of canine vision and support a healthier life for dogs as they age.
Water bears' remarkable hardiness is linked to a molecular sensor that detects free radicals, triggering dormancy. Cysteine oxidation plays a key role in this process, enabling tardigrades to respond to environmental stressors.
A team of researchers used high-resolution isotope profiling to connect the wanderings of a woolly mammoth with the earliest known human settlements in eastern Beringia. The study suggests that mammoths may have played a role in facilitating human migration to the Americas, and their social structures may have been influenced by climat...
A study of 379 animal studies found no consistent impact of aging on ejaculate traits, contradicting the human trend. In some species, age even improved reproductive traits, such as larger ejaculates and increased sperm viability.
Researchers have documented cannibalism in the mainland dusky antechinus during its breeding period. The behavior is linked to stress-induced death and provides an opportunity for energy gain via eating dead males or females of other species.
A study published on Nature Food highlights the potential of using by-products in animal diets to save land and water resources. The research suggests that substituting energy-intensive crops with agricultural by-products could reduce competition for natural resources and improve food security.
Researchers at Washington State University discovered that cannabis activates a set of cells in the hypothalamus, promoting appetite in mice. The study used calcium imaging technology to determine how brain cells responded to vaporized cannabis sativa.
Researchers discover antibody-dependent enhancement of toxicity (ADET), a phenomenon where antibodies can amplify venom's potency. The breakthrough contributes to expediting the development of a new generation of antivenom, potentially saving millions from snakebites yearly.
Researchers at the University of Oxford have created a standardized safety test to assess how dangerous robotic lawnmowers are to hedgehogs. The test uses specially designed hedgehog crash test dummies and has found that many models pose a threat to these animals, especially at night when they are most active.
Researchers successfully reduced bladder tumor size by 90% in mice using nanorobots propelled by urea. The nanomachines deliver a radioisotope to the tumour, attacking it with precision and efficiency. This breakthrough could lead to more effective bladder cancer treatments and reduced hospitalization costs.
A UC Riverside research project will focus on changes in the gene network that specify early intestinal precursor cells in nematodes like Pristionchus pacificus. Gene networks describe how genes turn each other on and off, and changes in these networks can lead to diseases such as cancer.
A new study reveals that bacteria associated with gum disease promote COPD through the activation of γδ T cells and M2 macrophages in the immune system. Researchers found that mice infected with periodontitis and COPD had worse progression, highlighting a potential new strategy for treating COPD.
Researchers have sequenced the first genome of myxini, a large group of vertebrates without a reference genome, revealing insights into evolutionary history and genomic duplications. The study provides new perspectives on the origins of complex vertebrate structures.
UAB researchers have created a 3D, three-layer nanomatrix vascular sheet that mimics human atherosclerosis, enabling high-throughput drug screening. The model replicates key features of the disease and has been validated with two classic atherosclerosis drugs.
Research using thermal imaging found that numbats are prone to overheating during hot weather, with body temperatures exceeding 40°C. Their unique fur mechanism allows for heat exchange, but is limited by temperature and shade availability.
A study using infrared cameras found that high air and ground temperatures limit numbats' ability to forage in the sun, forcing them to retreat to the shade. Climate change may also make the shade too hot for numbats to survive.
Researchers discovered a previously unreported neuron type with vulnerability in Parkinson's disease, shedding light on the complexity of the disease and potential therapeutic targets. The study identified distinct transcriptomic signatures of this neuron type and found reduced RIT2 expression in Parkinson's disease patients.
Researchers tracked 87 Adélie penguins using electronic tags, revealing how they interact with sea ice during their long-distance migrations. The study highlights the interconnectedness of species in the Southern Ocean and how climate change may impact Adélie penguin populations.
New research found that rapid-acting antidepressants modulate affective biases associated with learning and memory. The study proposes a neuropsychological mechanism explaining both immediate and sustained effects of these drugs.
Research reveals that red knot characters are formed in the first year of life, shaped by initial experiences in the Wadden Sea. Young birds exhibit more variable behavior and diet, while older birds have consistent food preferences and character types.
Researchers found that the deletion of the Gtf2i gene impairs mitochondrial organelle formation and function, leading to abnormal cell behavior and neurodevelopmental pathologies. This discovery sheds light on the mechanism behind Williams syndrome, a rare genetic disorder characterized by cognitive and social impairments.
A comprehensive study reveals repeated incursions of Foot-and-Mouth Disease virus in Israel and neighboring areas, emphasizing the importance of improved surveillance, vaccination efforts, and cross-border cooperation. The research underscores the necessity for unified strategies to effectively combat FMD and reduce its economic and ag...
Researchers found that hummingbirds use two distinct strategies to control their flight: an internal forward model for speed and direct visual feedback for altitude changes. This study's findings can inform the programming of autonomous flying vehicles.
A study found that Spanish butterflies are better at regulating their body temperature by basking in the sunshine compared to British counterparts. However, rising global temperatures due to climate change may put Spanish butterflies at greater risk of extinction if they cannot adapt quickly enough.
Researchers have mapped hundreds of pig genes and identified similarities with humans, shedding light on disease development and potential treatments. The study paves the way for targeted medicines and more precise gene editing in pigs.
The project will assess how xanthophyll carotenoids in NutraMaize Orange Corn mitigate negative health effects associated with heat-induced oxidative stress. The researchers aim to improve egg-laying hen health and performance during heat stress events.
Scientists have developed a method to study bobcats using only their pawprints, allowing for extensive data collection and analysis of ancestral background and microbial communities. This technique has the potential to inform better management and conservation of rare or endangered species.
Africa's birds of prey are experiencing unprecedented declines, with nearly 90% of 42 species examined declining in population. The study highlights the need for strengthened protection of natural habitats to mitigate these threats.
Researchers have discovered that whirligig beetles use a lift-based thrust mechanism to achieve record-breaking speeds, challenging previous explanations of their propulsion system. This finding offers valuable insights for bio-inspired robotic ship design and uncrewed boat development.
The Taiwanese Leaf Litter Beetles Barcoding project has created a comprehensive reference library for these elusive beetles using DNA barcoding. The dataset comprises 4,629 beetles representing 334 species candidates from 36 families, unveiling taxonomic insights and enhancing our understanding of their biology and ecological roles.
Researchers have developed a novel tool for the selective and efficient recovery of large DNA molecules using TAR cloning. This technique has been applied to isolate individual gene alleles, study genome architecture and evolution, and engineer synthetic viruses with novel properties, including vaccine development.
Researchers found that captive-bred Egyptian vultures improved their flight skills faster than those raised in the wild. The study suggests that early life experiences have a lasting impact on animals' ability to cope with challenging periods like migration.
The study found that black spots in salmon fillets contain eumelanin, a type of melanin present in human hair and skin, while red spots do not detectably contain melanin. The discovery provides an important step towards understanding the cause of these unsightly spots.
A pair of proteins YAP and TAZ have been identified as conductors of bone development in the womb. They help direct blood vessel integration into cartilage, a vital aspect of bone development, and may provide insight into genetic diseases such as osteogenesis imperfecta.
Researchers found that nearly all male southern elephant seals are specialists, consistently eating the same food items over time with little variation. The study suggests that specialization could improve foraging success rates and help them compete for breeding rights.
Research reveals that the midbrain of midshipman fish initiates and patterns sounds used in vocal communication. The findings suggest a functional comparable periaqueductal gray node between fish and mammals, which can influence acoustic structure of social context-specific vocal signals.
A team of scientists sequenced the full genome of a sea cucumber collected at a hydrothermal vent, revealing expanded gene families involved in DNA repair and iron metabolism. The research provides valuable insights into the unique adaptations of marine animals to survive in extreme environments.
A recent study suggests that many nocturnal Strepsirrhines live in pairs of males and females, challenging the long-held assumption that these primates are solitary. Researchers found that pair-living was the most common social organization among ancestors 70 million years ago.
Researchers examine the dynamic nature of fear responses in varied environments, shedding light on physical manifestation of memory in the brain. The study reveals that fear memories are linked to pathological states like PTSD and generalized anxiety, with direct translational relevance for disorders involving dysregulated fear responses.
A University of Queensland study found humans can correctly identify the emotional context of chickens' clucks, with 69% accuracy. The ability to detect emotional information from vocalisations could improve the welfare of farmed chickens.
Matabele ants can recognize infected wounds and effectively treat them with their own produced antibiotics, drastically reducing mortality. The ants' sophisticated healthcare system has medical implications for humans, as the primary pathogen in ant wounds is also a leading cause of infection in humans.
A new study reveals that landfills in Chile's Loma Los Colorados host the largest known aggregation of Andean Condors. The birds' numbers are linked to food availability in the surrounding landscape and fluctuate with livestock movements. Landfill management is crucial to support condor conservation.
A team of researchers discovered a multiprotein complex involving NLRP3, AIM2, NLRC4, and Pyrin that drives PANoptosis, a type of programmed inflammatory cell death. The findings have implications for understanding inflammasome biology and identifying potential therapeutic targets.
A study by Johns Hopkins Medicine has identified teneurin-3 as a key protein for stabilizing the body's circadian rhythms. The protein helps wire the brain during neural development to allow for stable responses to light changes, reducing the impact of disruptions on sleep and other cycles.
A drug screening system modeling cancers with lab-grown tissues called organoids helped uncover a promising target for future pancreatic cancer treatments. Researchers identified an existing heart drug, perhexiline maleate, that powerfully suppresses the growth of pancreatic tumor organoids.
A new study led by the Smithsonian identifies five new species of soft-furred hedgehogs from Southeast Asia, using DNA analysis and physical characteristics. The two new species, Hylomys vorax and H. macarong, are endemic to the endangered Leuser ecosystem in North Sumatra and Southern Vietnam.
Research reveals how diabetes disrupts lung immune cell function, leading to severe infections. Tight control of blood sugar levels or small molecule drugs may alleviate this susceptibility.
The UMass Amherst team has developed a first-of-its-kind dual-color optoelectronic neural probe, enabling bidirectional control of brain activity in specific cortical layers. This innovation holds promise for advancing our understanding of diseases such as epilepsy and Parkinson's disease.
Researchers analyzed Aqp10s in eight bony vertebrate species to understand the evolutionary timeline of diminished boric acid and urea transportation. The study found that Aqp10.2 in ray-finned fishes restricts urea and boric acid passage, suggesting a loss of solute transport through evolution.
A research team at Texas Tech University Health Sciences Center discovered a unique sodium pump variant in brine shrimp that enables them to thrive in high-salinity environments. This NKA variant uses more energy than common variants, allowing the animal to maintain steeper Na+ gradients.
Researchers found a new species of fanged frog on Sulawesi Island, with males guarding eggs on leaves to keep them moist. The tiny frogs weigh about the same as a dime and have barely visible fangs, challenging previous assumptions about their reproductive behavior.
A new study in the Journal of Dairy Science analyzes the life cycle of milk production in 47 small farms in Karnataka, India, identifying key emissions hotspots and potential sustainability improvements. The research highlights the importance of high-yielding animals and efficient feeding strategies to reduce carbon footprints.
Researchers discovered that dragonflies change their average coloration seasonally, with darker colors absorbing heat and lighter colors protecting against overheating. This adaptation allows them to regulate their body temperature in response to changing solar radiation conditions.
A genomic analysis of seized pangolin scales reveals that they were sourced from West and Central Africa, highlighting the complex pathways of illegal trade. The study's findings can inform conservation efforts and support enforcement measures to protect endangered species.
Researchers found that one group of vervet monkeys exhibited more affiliative behavior and reciprocated grooming, suggesting a social tradition. This discovery challenges the idea that ecological differences explain behavioral variations and highlights the importance of social influence in shaping primate cultures.
A new study reveals that pandas are more socially active than previously thought, using scent-marking trees to exchange information about their lives. In non-mating seasons, they primarily hang with family members, but branch out during mating seasons.
Researchers found that great apes and chimpanzees can recognize groupmates they haven't seen in over two decades, suggesting a shared common ancestor and potentially the longest-lasting nonhuman memory. The study uses infrared eye-tracking cameras to record participants' gazes at images of familiar and stranger bonobos or chimps.