Mount Sinai researchers have identified a brain circuit, the anterior hypothalamic nucleus (AHN), that helps explain how prior adversity makes the brain more reactive to future stress. The study found that dialing AHN activity up or down directly altered how strongly mice responded to stress.
A study in mice with Rett syndrome found altered pubertal development and hormonal regulation, affecting social behavior, cognition, and muscle-skeletal health. The MECP2 gene mutation disrupts the hypothalamus-pituitary-gonadal axis, leading to delayed puberty, low hormone levels, and neuroendocrine alterations.
A clinical trial has shown that setmelanotide, a new drug, can achieve significant weight loss in people whose weight has become dysregulated following treatment for a brain tumor. The treatment resulted in a 20% reduction in BMI, with participants experiencing substantial health benefits.
Researchers at Nagoya University identified the neural circuit responsible for timing torpor in mammals, which reduces body temperature and metabolism. The discovery provides new insights into how animals regulate energy use.
Researchers found significant loss of neurons in the locus coeruleus, a second critical region involved in arousal and muscle tone regulation. This finding suggests an immune-mediated process and challenges the prevailing explanation for narcolepsy with cataplexy.
A collaboration between the University of Maryland and University of Concepción has discovered a previously unknown communication chain involving astrocytes and tanycytes that controls behavior. The study suggests that targeting the HCAR1 receptor in astrocytes could offer a novel approach to treating eating disorders.
Researchers investigated brain mechanisms that maintain balance between intimidation and physical aggression in mice. Projections from the lateral hypothalamus to the dorsal raphe nucleus play a critical role in preserving this balance. Increasing pathway activity led to increased attacks, while inhibiting it decreased attack bites.
A study published in Science reveals that microglia and the protein RANK are involved in regulating the hypothalamic-pituitary-gonadal axis, which controls fertility. The research found that suppressing RANK expression led to distorted reproductive function, including reduced sex hormones and hypogonadism.
A University of Houston researcher disputes a study claiming multilingualism promotes healthy brain aging, finding that wealth and healthcare systems may drive longevity instead. Hernandez argues that individual behavioral solutions, such as learning a language, are oversold and distract from structural factors that support healthy aging.
Research found that breast cancer flattens corticosterone release in mice, reducing quality of life and increasing mortality. Disruptions to diurnal rhythms have been linked to stress responses like insomnia and anxiety in cancer patients.
Researchers have identified the cells and connections underlying a fish's ability to dynamically change color to match its surroundings. The study found that specialized skin cells called melanophores control the color change, which helps the zebrafish evade predators by lightening its skin over tens of minutes.
A research team, including Dr. Yong Xu, will use the grant to investigate genetic changes affecting hypothalamic pathways and their impact on metabolism and behavior in humans and animals. The study aims to unravel the precise way brain wiring controls instinctive behavior across species.
Research found that high-fat and high-carbohydrate diets are controlled by separate neural pathways in the brain. Neuropeptide Y neurons activate AMPK-regulated corticotropin-releasing hormone neurons to promote high-carb intake, while inhibiting melanocortin 4 receptor neurons to increase high-fat intake.
A new study reveals the complex brain circuits involved in growth hormone release during sleep. The findings provide a map for understanding how sleep and hormone regulation interact, potentially leading to new treatments for sleep disorders and degenerative diseases.
Two ISTA Assistant Professors, Amelia Douglass and Ylva Götberg, have won 1.5 million euro ERC Starting Grants to explore how animals react to stress and the science behind binary-star stripping. Their research could lead to a better understanding of brain pathways disrupted in humans suffering from anxiety and stress.
Bentz will investigate how maternal hormones shape behavior across generations in House sparrows, with implications for understanding animal adaptation. The research aims to identify gene networks that respond to early testosterone exposure and track changes from development through adulthood.
Researchers discovered that stress activates neurons in the paraventricular nucleus of the hypothalamus, leading to impaired sleep and memory. Inhibiting these neurons reduced stress-related memory issues while slightly improving sleep.
Researchers at University of Arizona Health Sciences identified a potential way to reduce female post-operative pain by inhibiting pituitary prolactin. Stress can increase circulating levels of prolactin, leading to worsened post-operative pain in women.
A comprehensive review article synthesizes decades of research on stress hormone systems in primate brains, revealing key differences between rodents and primates. The findings highlight the importance of considering anatomical differences when developing treatments for stress-related psychiatric disorders.
Dr. Seymour Reichlin's remarkable career spanned five decades, marked by scientific excellence, mentorship, and generosity. His influence on neuroendocrinology has been profound, with ongoing contributions at age 100 revealing new insights into Alzheimer's disease and ecstatic mysticism.
A study published in Nature Metabolism reveals a novel mechanism connecting prolactin, estrogen, the brain, and metabolic adaptations during lactation. Hormonal changes during lactation lead to increased hunger and reduced fat-burning, which are sustained by a specific area of brain cells called ERα neurons.
The study reveals conserved neural patterning mechanisms in mammalian hypothalamus development, tracing how brain cells emerge from neural progenitors during growth. The researchers identified four adaptive evolutionary divergences in human neurons, including a unique subtype and enhanced neuromodulation.
A study found that consuming sucralose alters brain activity related to hunger and increases appetite, especially in people with obesity. The sugar substitute changes how the hypothalamus communicates with other brain regions, including those involved in motivation, potentially leading to cravings and eating behavior changes.
Scientists at Brown University and Cincinnati Children's found that suppressing opsin 3 in the brain of mice makes them eat less. The study suggests that opsin 3 plays an important role in regulating food consumption via the melanocortin 4 receptor MC4R.
Scientists at Indian Institute of Science have found how diverse neurons across different brain regions work together to control chronic pain in mice. The lateral parabrachial nucleus (LPBN) plays a key role in driving chemotherapy-induced peripheral neuropathy, allowing mice to cope with or suppress pain.
Researchers at EPFL and Lausanne University Hospital have achieved a major milestone in treating spinal cord injuries by applying deep brain stimulation to the lateral hypothalamus. This therapy has improved mobility and independence in two individuals with partial SCI, demonstrating long-term neurological improvements.
A team of scientists has pinpointed a critical neural circuit for female sexual rejection, revealing how the brain integrates signals to shape behavior. The ventromedial hypothalamus, specifically progesterone-sensitive neurons in the anterior VMH, play a crucial role in determining whether a female accepts or rejects mating attempts.
A high-fat diet can promote overweight and increase diabetes risk, but fat alone does not change the brain's hypothalamus. Other macronutrients like sugar may have more profound effects on AgRP neurons.
A recent study by FAU researchers reveals how the brain coordinates food intake to ensure we receive the right amount of energy. The hypothalamus, a control center in the brain, triggers behaviors like eating and satiety through a complex mechanism involving four teams of neurons that work together like relay runners.
Research reveals a link between epigenetic factors and metabolic syndrome, highlighting the critical role of the hypothalamus in regulating energy balance. Studies show that maternal obesity can reprogram offspring's metabolism through epigenetic modifications.
Researchers found that patterns of neural activity in the hypothalamus predict performance in survival tasks, while associations with other brain regions were observed for hunting and escaping behaviors. The study provides new insights into how the human brain coordinates survival strategies.
SourcePLOS·JournalPLOS Biology·TypeComputational simulation/modeling·DateJun 27, 2024
Research found that higher light levels increase activity in the posterior hypothalamus, leading to improved cognitive performance during executive tasks. In contrast, lower light levels decreased activity in this region, negatively correlating with cognitive performance.
Researchers found that middle-age obesity is caused by age-related changes in the shape of neurons in the hypothalamus, a region controlling metabolism and appetite. A protein called MC4R detects overnutrition and regulates metabolism to prevent obesity. Dietary restriction may help maintain brain anti-obesity systems as we age.
A new study published in Nature found that a distinct area on the underside of the hypothalamus influences longer-lasting avoidance behavior after being defeated. The research suggests that oxytocin plays a key role in this process, binding to receptors on brain cells and signaling danger.
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 discovered a critical communication pathway between the brain and fat tissue that contributes to aging. Activating specific brain cells improved energy production, physical activity, and lifespan in mice by 7%. The findings suggest potential interventions to maintain this feedback loop and slow aging effects.
A recent study published in Nature Communications has identified a key brain molecule responsible for triggering overconsumption of comfort foods after stressful events. The lateral hypothalamic proenkephalin neuron plays a crucial role in driving threat-induced eating associated with negative emotional states.
A Virginia Tech scientist has identified a molecule in the hypothalamus region of the brain linked to stress-induced emotional overeating. The discovery may lead to new therapy targets for alleviating emotionally triggered eating.
A team of researchers from Kyoto University found that the pituitary vasopressin system is crucial for building a robust circadian clock in the suprachiasmatic nucleus. This discovery has led to the development of potential treatments for jet lag, which currently target only the suprachiasmatic nucleus.
Researchers at Imperial College London found that specific brain cells in the prefrontal cortex trigger mice to prepare for bed when tired, a behavior likely shared with humans. This hard-wired survival feature suggests that humans should prioritize sleep hygiene to maintain good health.
A new study in rodents reveals that infant cries prompt the release of oxytocin, a brain chemical controlling breast milk, in mothers. The study shows how sound information travels to the brain, triggering the hormone release, which continues for around five minutes.
Researchers have identified a cluster of neurons in the hypothalamus called GABRA5 that regulates energy expenditure. Astrocytes control this cluster, producing tonic GABA that inhibits it, leading to weight gain.
Researchers found that individuals with higher body mass indexes have impaired connections between the hippocampus and hypothalamus, leading to an inability to control eating habits. The study suggests that targeting this brain circuit may lead to new treatments for obesity and related disordered eating conditions.
Researchers found that the hypothalamus, a key region controlling appetite, is larger in individuals who are overweight or obese compared to those with a healthy weight. The study suggests that increased volume may be linked to inflammation and altered hormone regulation.
A recent study published in Nature Communications identified an important brain circuit for socially subjective reward valuation, finding that temporarily disconnecting the medial prefrontal cortex from the lateral hypothalamus reduces susceptibility to others' rewards but not individual expectations. This research has significant impl...
Researchers at the University of Otago, Dunedin, New Zealand discovered a dahlia extract that improves blood sugar regulation without reported side effects in humans. The extract targets the brain's function required for blood sugar regulation by enhancing insulin function.
Researchers at ETH Zurich discovered that orexin neurons directly influence emotional state through pupil size. This finding opens new avenues for medical treatment and diagnosis of sleep disorders like narcolepsy and other neurological conditions.
Scientists at Karolinska Institutet have identified a group of nerve cells involved in creating negative emotional states and chronic stress. The neurons, which are sensitive to oestrogen levels, were mapped using advanced techniques such as Patch-seq, Neuropixels, and optogenetics.
The ventral lateral preoptic area (VLPO) has a novel function in inducing arousal, contrary to its traditional role in promoting sleep. VLPO neurons form direct connections with orexin neurons in the LHA, leading to wakefulness induction.
Researchers found that eating small amounts of high-fat and sugar foods regularly rewires the brain to prefer these types of foods. The brain's dopaminergic system is activated, leading to a subconscious preference for rewarding food.
A new study found that loss of Menin in the hypothalamus drives physiological aging in mice, including cognitive decline and reduced lifespan. However, supplementation with the amino acid D-serine reversed these age-related changes, improving skin thickness and bone mass.
Researchers found that leptin receptor neurons prioritize social interaction over eating and drinking in moderately hungry mice. This system can only regulate moderate hunger, but not strong hunger, which may contribute to why diets don't work.
Scientists found that chronic stress increases the activity of proopiomelanocortin (POMC) neurons, leading to behaviors such as anhedonia and depression. Inhibiting POMC neuron activity reduced these behavioral changes. The study suggests that POMC neurons play a key role in increasing susceptibility to stress-related behavioral problems.
A study by Nagoya University researchers has identified EP3 neurons as crucial in maintaining a stable body temperature of 37°C in mammals. The discovery could lead to the development of technologies that artificially adjust body temperature to treat heat stroke, hypothermia, and obesity.
Research reveals TBX3 as a fate determinant controlling hypothalamic KNDy neuron development and puberty onset. Multiple TBX3 mutants fail to form phase-separated condensates, leading to delayed puberty in UMS patients.
Researchers found that IGF1 gene therapy increases kisspeptin expression and GnRH release, and alters microglial cell numbers, suggesting a potential protective effect against reproductive decline. This could lead to new strategies for optimizing lifespan and combating age-related health problems in women.
A study published in Science Advances reveals that physical exercise triggers a neuromuscular circuit that links the production of interleukin-6 to muscle fat breakdown. This circuit is crucial for weight loss and has significant implications for obesity treatment.
A research team has identified a specific cell group in the brain that regulates shifts in the sleep-wake rhythm caused by psychostimulants. The hypothalamic dopamine locus is responsible for modulating circadian rhythms and gates the effect of psychostimulants, leading to increased alertness and activity.
Researchers at Eötvös Loránd University identified a novel neural pathway in the brain that processes touch information, which plays a crucial role in social behavior. The thalamo-hypothalamic neural pathway uses PTH2 as a neurotransmitter and facilitates friendly social interactions between rats.
A new map of brain stem circuits controlling eating behavior could lead to better obesity treatments. The atlas, built from recent discoveries in mice and human studies, identifies two food intake-suppressing circuits in the brain stem, one causing nausea and another not.