Researchers isolated genes from the starlet sea anemone to understand body-plan patterning. They found that two types of proteins encoded by these genes are expressed differently in anemones compared to bilateral animals like flies and frogs, suggesting an ancient function for this signaling system.
Researchers found that free-living hummingbirds in Canadian Rocky Mountains have impressive timing abilities, remembering interval between visits to individual flowers. They can maintain 'independent stopwatches' for up to eight different flowers, allowing them to plan efficient nectar harvesting
A 14-year study of wild capuchin monkeys reveals that fathers almost never mate with their daughters, despite alpha males siring most offspring from unrelated females. This suggests the evolution of sophisticated behavioral barriers to prevent inbreeding within individual populations.
Researchers used Transcranial Magnetic Stimulation to test frontal cortex role in non-language tasks. Participants struggled with understanding others' actions after left frontal cortex stimulation, suggesting its importance for social cognition and communication.
Researchers have found a way to protect vulnerable neurons in the hippocampus from stroke damage by correcting a specific molecular malfunction. By targeting the AMPA receptor subunit editing machinery, they can prevent calcium influx and subsequent neuronal injury.
Researchers found that a new experimental drug, AF267B, reversed key cognitive deficits and reduced pathological plaques and tangles in the brain of Alzheimer's patients. The treatment improved learning and memory abilities in mice with amyloid plaques and neurofibrillary tangles, but not in other brain regions.
Researchers found that male-specific gene SRY is required for normal brain function of dopamine-secreting neurons. This may help explain the higher incidence of Parkinson's disease in males, which exhibits a 3:2 ratio with females.
Researchers used virtual-reality displays to show that humans can't accurately judge size and distance when motion is present. Instead, they prefer a stable representation of the world independent of head and eye movements.
A new study found that breeding Zambian mole-rats lived up to 20 years and twice as long as non-breeding individuals. The researchers suggest this could be due to the species' eusocial lifestyle and pair-bonding habits, making it a valuable model organism for studying aging mechanisms.
A recent study by Turi King and colleagues found that men who share surnames are more likely to have similar Y chromosomes, suggesting a common ancestor within the past 20 generations. The research has implications for genealogy and forensic science, as it may enable surname prediction from DNA alone.
A study found that high-status male macaques took longer to follow the gaze of other dominant monkeys compared to low-status individuals. The researchers suggest that testosterone levels in high-status males may suppress social vigilance, a trait often seen in low-status males.
Researchers discovered that modern birds can form teeth in embryonic stages with similar developmental positions to mammals. The talpid2 strain of chicken harbors a genetic change allowing this process.
Researchers found that orexin A induces adaptation necessary for drug-craving behaviors in human addicts. The peptide signaling pathways for orexin and CRF may prove fruitful targets in the search for addiction medications.
Researchers created a genetically altered mouse strain with overexpressed dopamine receptors in the striatum, which showed specific cognitive deficits similar to human schizophrenics. The study suggests that cognitive symptoms may arise from subtle genetic differences in the dopamine receptor gene.
Researchers have identified small molecules called indoxins that can potentiate the effectiveness of doxorubicin in E6-expressing colon cancer cells. The compounds drive two distinct cell cycle-related mechanisms, overcoming E6-induced drug resistance and increasing sensitivity to chemotherapy.
Researchers found that most sporadic basal-like breast cancers display abnormalities in the management of the X chromosome, leading to increased expression of specific genes. This defect may contribute to cancer development and progression in these aggressive subtypes.
Macrophage interaction reverses activity of hormone receptors in prostate cancer cells, leading to shifts in gene expression and drug resistance.
Researchers identified an abnormal variant of β-MSH in five out of 538 obese children, which was more common in overweight or obese family members than in normal-weight relatives. The mutation altered the hormone's structure and ability to stimulate brain receptors, leading to increased obesity risk.
Researchers found that Antarctic krill can perform multiple daily vertical migrations, with some descending rapidly like parachutes. This behavior is estimated to sequester 0.02 metric gigatons of carbon per year, equivalent to annual emissions from 35 million cars.
Researchers used a short-lived fish species to test the effects of resveratrol on aging-related physiological decay. The compound was found to increase longevity and delay the onset of memory and muscular performance decays.
Scientists Jun-Yi Leu and Andrew Murray evolved yeast populations in the lab to study early stages of speciation. After 36 generations, the evolving population became five times more likely to mate with other evolved cells, suggesting genetic mutations altered mating timing and promoted reproductive isolation.
A team of scientists found that individual neurons in the auditory cortex respond more strongly to stimuli conforming to the 1/f rule than to others. This selective sensitivity leads to a more accurate representation of natural sounds within the brain.
Researchers used a fruit-fly model of Alzheimer's disease to examine the relationship between cell-division proteins and neurodegeneration. They found that abnormal expression of these proteins accompanied neuronal death in their fly model, which was prevented by blocking the cell cycle or feeding anticancer drugs.
Researchers have discovered a functional interaction between the genes MECP2 and BDNF, which could lead to new therapeutic opportunities for Rett syndrome patients. By modulating BDNF expression, it may be possible to delay or reverse disease progression.
A master determinant was identified to generate dopamine neurons from embryonic stem cells, promising advances in cell replacement therapy for Parkinson's disease. The discovery also highlights the importance of understanding developmental processes for producing authentic cells from stem cells.
Researchers found that the Runx1 gene is essential for the development and function of nociceptive sensory neurons, which are responsible for sensing pain. The study reveals that Runx1 regulates the specification of these neurons and their wiring, providing a genetic basis for chronic pain.
Researchers found that Viagra's inhibition of PDE6 enzyme causes transient losses in sensitivity to flicker, with severe cases showing almost doubled integration times. This unique effect enables scientists to study the role of PDE6 in vision and light adaptation.
Researchers have identified two chitin deacetylase genes as controlling tracheal tube length in Drosophila. These enzymes modify the chitinous mandrel to instruct termination of tube elongation, suggesting a mechanistic model for size regulation.
Researchers discovered that reactive oxygen species are essential for the development of balance machinery in the inner ear. The study found that a specific mutation in the Noxo1 gene, which encodes an NADPH oxidase enzyme, led to impaired balance and altered posture in mice.
Researchers have discovered a new key area in the brain that responds to the fat hormone leptin, which plays a crucial role in resisting high-fat-diet-induced obesity. The ventromedial hypothalamus (VMH) region, previously thought to only be involved in appetite regulation, was found to also respond to leptin and is essential for maint...
The study reveals that specific cells in fly brains detect distinct tastes, with separate neurons responding to sweet and bitter substances. This discovery suggests a model of taste encoding in the brain where dedicated neural circuits dictate behavioral outputs.
Researchers create conditional mouse model to study CBFB-SMMHC, a fusion protein linked to 12% of human AML cases. The model shows that CBFB-SMMHC induces abnormal preleukemic blood cell progenitors, leading to AML development in adult mice.
A study found that the Hh pathway in insects determines whether adult stem cells are fated for fat or bone, with implications for treating osteoporosis, diabetes, and obesity. The researchers also discovered that drugs targeting this pathway could potentially build stronger bones while reducing fat.
Researchers found that therapies targeting brain insulin receptors can significantly improve blood sugar control and reduce insulin dose requirements. Gene therapy interventions also increased the animals' response to insulin therapy about 2-fold.
Research suggests that sexual orientation influences how people perceive individual faces, particularly in the brain's reward circuitry. The study found that heterosexual women and homosexual men responded more strongly to male faces, while heterosexual men and homosexual women responded more to female faces.
Researchers found that fruit fly species D. sechellia develops a specialized olfactory system to detect the morinda fruit, which is toxic to other species. This unique system involves increased numbers and sensitivity of specific olfactory hairs, suggesting an evolutionary adaptation in just a limited time span.
Researchers discovered a single mutation in human TRIM5 gene that impairs its ability to defend against retroviruses, including HIV. This mutation occurs at high frequency in some ethnic groups and may have contributed to the evolution of impaired retroviral defense genes.
Blindfolded subjects improved in recognizing trained movement patterns without visual stimulation. Skilled performers showed greater accuracy due to more precise motor programs supporting visual recognition. The study demonstrates a direct link between learned motor skills and visual action perception.
Researchers found that anandamide, a brain's own cannabis compound, protects neurons from inflammation after damage. Adding AEA to damaged brain tissue abolished inflammatory damage, but not primary excitotoxic damage.
Scientists used fMRI to study how humans learn to associate brand preferences with rewards, finding key activity in the ventral midbrain and ventral striatum. The study sheds light on the neural mechanisms behind consumer behavior and advertising effectiveness.
A study published in Neuron found that stimulating brain cells increases Aß levels, while blocking neuronal activity decreases them. Cognitive activity may also affect Aß plaque levels.
A study published in Neuron found that the CB1 receptor is integrated with leptin signaling to control appetite, with implications for obesity treatment. Blocking CB1 receptors may offer a promising approach to treating obesity, and recent antiobesity drugs like rimonabant may also work by reducing endocannabinoid signaling.
Researchers introduce a modified form of ChR2 in C. elegans neurons and muscle cells, allowing blue-light activation to trigger strong contraction and backing behavior. Electrophysiological experiments confirm the effects are due to ion flow caused by light exposure.
Researchers found that plants trigger the elimination of a genomic island in bacteria to prevent infection, but this process can also drive the evolution of more virulent strains. The study reveals a molecular mechanism for how plant defenses can lead to the emergence of new bacterial pathogens.
Researchers found that GABA-triggered neurons contribute to the development of epilepsy in immature brains through fast oscillations. As brain maturity increases, glutamate's excitatory effects dominate, reducing GABA's impact on epilepsy.
Researchers discovered that a Jekyll-and-Hyde enzyme plays a crucial role in Alzheimer's disease. Transient production of the enzyme p25 enhances learning and memory, whereas chronic expression impairs these cognitive functions. The study uses mice to demonstrate the dual effects of p25 on neural mechanisms.
Research reveals that mice lacking SMAD4 gene in the liver exhibit dramatic iron accumulation, similar to human hemochromatosis. The liver plays a central role in iron regulation, and boosting TGF-ß signaling pathway holds promise for treatment.
Researchers found that deuteranomalous individuals can distinguish between colors inaccessible to normal color vision, suggesting a unique color dimension. This discovery challenges the long-held assumption that colorblindness is solely related to reduced color perception.
A new study has identified a key regulator of spindle orientation in mammals, essential for neural development. The discovery sheds light on the complex process of neural stem cell division and its impact on brain structure and function.
The study found that ischemia triggers NMDA receptors, which activate CaMKII, enhancing ASIC1a's sensitivity to acid. This increased sensitivity causes calcium overload leading to neuronal death. Drugs inhibiting NMDAR or CaMKII prevented this damage.