Articles tagged with Animal Experimentation
Guinea baboons developed common rules for a device task in just three days, demonstrating efficient and arbitrary solutions. The conventions were stable over time and unaffected by the absence of individual interaction.
Researchers developed metrics to quantify information in animal responses to reward feedback, showing that animals exhibit undermatching behavior. The new metrics provide a way to predict this deviation from the matching law, offering insights into adaptive behavior and decision-making.
A recent study led by Okayama University scientists found that metformin activates a subset of immune cells called CD8+ T-lymphocytes to attack and kill tumor cells. The study revealed that metformin increases the production of reactive oxygen species in these cells, which activates growth pathways and allows for proliferation.
Researchers at CNIC have identified the essential role of GPR126 in placental development, revealing its critical function in fetal growth and viability. The study also highlights a possible link between GPR126 dysfunction and pregnancy complications such as preeclampsia.
A new study from the University of Pennsylvania School of Medicine found that the gene CDKL5 plays an essential role in the brain throughout life, even after childhood. Researchers discovered that reinstating CDKL5 activity in young adult mice with a genetic deficiency led to significant improvements in neurological problems.
A Binghamton University researcher has received a $1.74 million grant to investigate how prenatal alcohol exposure affects anxiety in offspring. The study aims to understand the relationship between corticotropin-releasing factor (CRF) and anxiety, with potential implications for diagnosis and treatment of human patients.
Researchers developed a new system to measure and stimulate the entire ventricular surface of mouse hearts, allowing for simultaneous optical and electrical tracking of heart activity. The POEMS system provides accurate measurements of action potential propagation with minimal differences between modalities.
Studies on mice and septic patients show that a specific B lymphocyte subpopulation produces large amounts of CD39, leading to increased adenosine levels and reduced macrophage activity. This results in heightened susceptibility to opportunistic infections, with survivors experiencing a sevenfold higher risk of severe infections.
Researchers discover that gastrin-releasing peptide (GRP) is widely conserved among vertebrates, but the NMB/bombesin system has diversified in some lineages. GRP has evolved independently from a single ancestral homologue and plays a role in regulating energy intake and expenditure in both amphibians and mammals.
A study by Osaka City University reveals that urban lighting and heat delay insect hibernation, allowing insects to enter hibernation up to 3 weeks later than in rural areas. The findings suggest that increased nighttime light and heat from urban areas interfere with the natural photoperiodism of insects.
Researchers identified a genetic mutation in nonhuman primates that closely resembles Pelizaeus-Merzbacher disease, a rare and progressive disorder affecting the central nervous system. The discovery was made possible by a massive genomic database built at OHSU's Oregon National Primate Research Center.
Researchers from UC Berkeley studied squirrels' ability to leap and land successfully to develop more agile robots. They found that squirrels assess their biomechanical abilities based on branch flexibility and gap distance, allowing them to adjust their strategies with minimal attempts.
A recent study found that a muscle protein called CaMKII improves strength, endurance, and fitness in young animals, but also contributes to an evolutionary tradeoff: increased susceptibility to age-related diseases. The research suggests that future therapies targeting CaMKII could stave off diseases of old age.
Research reveals significant differences in gut microbiomes worldwide, impacting immune responses and susceptibility to infections. The study found that microbial composition alone can impact immune resilience, with Guatemala's microbiome proving most resistant.
A computer simulation model of the mammalian female genital tract identifies essential physical characteristics and abilities for successful sperm migration. The study's findings have potential to improve assisted reproduction techniques in endangered species, livestock, and humans without animal experiments.
Researchers found that prolonged silicon consumption in small doses led to lung fibrosis and inflammation in rats and mice, with negative effects appearing six months after switching to clean water. The findings have implications for the use of microelement additives in dietary supplements.
A study finds that scientific papers on Alzheimer's disease research conducted in mice are more likely to be covered by the media if they don't mention mice in their titles. This results in exaggerated news headlines and limited reporting of the actual limitations of animal-based research.
Researchers at UC Riverside identified a cortical region in mice that transforms sensory input into movement, opening new directions for studying sensory-motor transformations. The discovery could lead to targeted therapy for patients with sensory- and motor-related brain deficits.
Researchers use novel algorithm to interpret brain signals in real-time, allowing them to predict monkeys' decisions before they make a movement. This breakthrough opens up new possibilities for understanding cognition and decision-making processes.
Researchers at University of Münster developed a new experimental design to improve reproducibility in animal experiments. The study found that this design resulted in better reproducible results compared to the conventional standardized design.
A new study published in Frontiers in Psychology found that cows are more relaxed when spoken to directly by a live human than when listening to a recorded voice. The researchers observed higher heart rate variability and lower heart rates after the live interaction, indicating improved mood.
A new study among mice shows a diet high in prunes can completely prevent bone loss after spinal cord injury and even restore some of the lost bone. Previous research has also shown positive effects on bone health in post-menopausal women and astronauts exposed to radiation.
Researchers discovered a novel brain mechanism that links anxiety and depression, showing unique cellular mechanisms activate as one pathology progresses into another. The 'switch' involves astrocytes and cytoskeletal mechanisms, which may be targeted for new classes of psychotropic drugs.
A team of scientists found that rats in groups outperform solo individuals by following simple behavioral rules, such as exploring uncharted paths but following others. The study reveals the optimal balance between individual and collective search performances, with extremes resulting in lower performance for the group and its members.
A study published in Journal of Cereal Science found that buckwheat enhances the production of SIRT1, a protein linked to increased life expectancy. The experiment involved adding 30% buckwheat to rats' diets, resulting in higher SIRT1 levels without weight loss.
Researchers from Ruhr-University Bochum have identified four criteria for understanding animal beliefs, including the ability to use information flexibly and recombine components in novel ways. These criteria are met by various species, such as crows, scrub jays, rats, chimpanzees, and border collies.
Researchers advocate for heterogenization, deliberately including biological variation in study design to balance conditions and improve generalizability. This approach aims to maximize knowledge gain per animal and experiment while reducing the number of animals needed.
An international team recommends integrating biological variability into experimental design to produce more generally valid results. This approach, called systematic heterogenisation, aims to reduce the number of experiments needed while increasing their reproducibility.
Researchers found that mice's visual capability changes between day and night due to their internal clock, not eye changes. They used a maze experiment to study how the circadian rhythm influences behavior and nerve signals in the retina.
A study revealed oxytocin's role in promoting bone synthesis while curbing bone loss during pregnancy and lactation. Oxytocin administration also reduced total body fat in mice, suggesting potential as a drug target for these conditions.
The Animal Study Registry is a free platform that pre-registers and documents details of animal studies to increase transparency and reproducibility in bioscience research. By promoting open science and data quality, the registry aims to reduce redundant experiments and improve knowledge gain.
Fruit-eating monkeys show a preference for low ethanol concentrations in fermenting fruit, suggesting that sweetness and carbohydrate content are more important than calorie content. The findings do not support the idea of human alcoholism originating from primates' preference for alcohol-containing overripe fruit.
Researchers investigate the neuropsychological basis of body representation in monkeys using a combination of illusions and behavioral tasks. The study reveals how the brain establishes a sense of body ownership, with activity in the premotor cortex correlating with perceived arm position.
Scientists have developed an experimental treatment using antisense oligonucleotides that slows the progression of scrapie, a degenerative central nervous disease caused by prions, in laboratory mice. Mice treated with the treatment lived 81% longer than untreated mice, with median survival times of up to 250 days.
Researchers found that remdesivir completely protected four African green monkeys from a lethal dose of Nipah virus. The study, published in Science Translational Medicine, provides promising results for the treatment of Nipah virus infection.
Researchers Sophie Piper and colleagues used a coin toss to confirm whether a drug protects the brain against stroke, questioning the need for repeated experiments in mice. The study reveals high rates of false positive results and highlights the 'replication crisis' in scientific research.
A four-week rest period was nearly as effective as an experimental drug in reducing discomfort and regaining function after injury from repeated moderate-strain activity. The study suggests that rest may be a good first treatment choice for common musculoskeletal disorders, with exercises and pain reducers used to aid recovery.
Researchers found that cold temperatures cause consumers to rely more on emotions when making decisions, favoring products with sentimental value. This phenomenon may benefit luxury retailers who sell emotion-laden products.
An experimental compound has been shown to prevent and alleviate cognitive and mood problems in mice with Gulf War illness-like symptoms. Researchers found that the treatment can normalize dysregulation of glutamate in the brain, a potential contributor to the condition.
A mathematical model by BfR reveals that publishing all studies, regardless of results, accelerates knowledge acquisition and reduces unnecessary follow-up studies. Using more test animals in a single experiment increases the likelihood of achieving correct and reproducible results.
The brain has a built-in noise-cancelling circuit that allows it to ignore predictable self-generated sounds, such as footsteps. This circuit works by sending a direct signal from the motor cortex to the auditory cortex, instructing inhibitory neurons to cancel out these sounds.
A team of researchers has identified a neural clock in the brain that organizes the flow of our experiences into an orderly sequence of events. This discovery sheds light on how our brains measure subjective time, which is distinct from external timekeeping mechanisms like clocks and circadian rhythms.
Researchers identified autoantibodies against adrenocorticotropic hormone (ACTH) in aggressive male prison inmates, showing altered cortisol secretion and decreased time to attack in mice. These findings suggest potential molecular mechanisms underlying human aggression and stress response.
Mesencephalic astrocyte-derived neurotrophic factor MANF administered to rats after ischemic brain injury promoted reversal of behavioral impairments. MANF treatment transiently increased phagocytic macrophages, suggesting a potential beneficial effect on inflammation and tissue repair.
Researchers found that growth hormone treatment improved cognition, reduced brain tissue loss, and promoted plasticity in the brain of mice with induced strokes. The treatment showed promise for facilitating rehabilitation and improving quality of life after a stroke.
A BfR study reveals specific research fields in need of new alternative methods, such as investigating and treating human diseases like cancer and hypertension. The EU-wide solution aims to enhance transparency and promote the development of alternative methods for more animal welfare.
A Duke University study found that bonobos are more attracted to jerk-like behavior than helpful actions, challenging the idea that humans have a unique preference for kindness. The researchers observed bonobos preferring individuals who hinder others over those who help, suggesting that having powerful allies may be key to their socia...
Researchers found that beta wave activity is not sustained but rather occurs in discrete bursts, and the timing of these bursts affects perception. The study's findings provide a better understanding of how beta waves help filter distractions to process sensations.
A study by IBS scientists found that mice develop 'social rules' to allocate rewards, promoting long-term benefits for both mice. The researchers used brain stimulation to induce a sense of pleasure, and observed that 60% of the mice waited for their turn, leading to more rounds and total reward time.
A new high-throughput system enables rapid and standardized mouse behavior and physiology studies, reducing experimental animal usage and time requirements. The system aims to facilitate reproducibility and data sharing, addressing issues of varying training protocols and data comparison across labs.
Researchers create a computational model to simulate focal cooling, a brain-cooling treatment that may ease epileptic seizures. The model reveals insights into the mechanism underlying this technique, which involves suppressing electrical signals in specific brain regions.
Researchers found that chimpanzees can learn the game as well as children aged four years old, with difficulty in finalizing the circular pattern. The study also compared the learning process of chimpanzees with preschool children.
Researchers discovered the role of cytokine TNF in causing herpetic neuralgia, a common symptom of shingles. The study provides insights into novel therapeutic approaches to combat acute and chronic pain associated with the condition.
A study shows that chimpanzees can learn the rock-paper-scissors game, but takes longer to grasp the third pair. The research team also taught the game to preschool children, who learned it quickly and accurately, especially as they aged.
Research with house mice suggests that a strength in one area of Darwinian fitness may come at the expense of another. Good fighters and good runners had about the same body mass, despite differences in oxygen consumption during running. The findings give a clue as to how trade-offs may have shaped our evolution.
Two experimental vaccines demonstrate protection against Zika-related congenital damage in mice, preventing placental damage and fetal demise. Researchers observed significant reduction of Zika virus RNA in maternal, placental, and fetal tissues among vaccinated mice.
Scientists at NERF have discovered a novel method to measure respiration dynamics, revealing that mice compare the strength of smells obtained through both nostrils for odor source localization. This process involves information transfer between brain hemispheres and has valuable implications for Alzheimer's research.
A new treatment modality called PPCA has been discovered that targets the DNA damage in rapidly expanding T cells, reducing autoimmune damage in mouse models of hemophagocytic lymphohistiocytosis (HLH) and multiple sclerosis (MS). The therapy, which leverages p53 potentiation with checkpoint abrogation, selectively interrupts DNA damag...
Researchers at Hiroshima University have developed a technique to assess anti-inflammatory properties of fortified health foods and medications using bioluminescence imaging. This method reduces the number of lab mice sacrificed and could revolutionize medicinal drug testing, particularly for obesity-related metabolic disorders.
Researchers used lab rats to demonstrate how environments shape eating habits, finding that pairing junk food with specific sound cues can reverse habitual behavior. Simple interventions like reminders or interrupting automatic processing of junk-food cues may also be effective in stymieing unhealthy food consumption.