Articles tagged with Circadian Pathway
Researchers found that meal timing programs the liver's daily rhythms and can have serious metabolic and health consequences when out of sync. The liver uses food signals to activate metabolic pathways, which can conflict with the body's natural circadian clock, leading to health issues.
Researchers at UMass Chan Medical School and the Marine Biological Laboratory identified four core clock genes controlling circadian rhythms in a crustacean, which also regulate circatidal behavior. The genetic system is highly malleable, allowing the tiny shrimp to maintain both a 24-hour and a 12.4-hour clock.
A recent study found that TYW5 gene dysregulation is associated with circadian disruption and schizophrenia, affecting locomotor rhythms and prefrontal synaptic ultrastructure. Altering TYW5 expression levels in mice led to changes in behavior, including increased locomotor activity and anxiety-like behavior.
A review in Brain Medicine argues that industrialization changed sleep timing and regularity, not duration, with hunter-gatherers sleeping between 6.4 and 7.1 hours a night, less than the industrialized average. The distinction matters, as it highlights the importance of timing and regularity in sleep patterns.
Researchers reviewed the impact of circadian disruptions on muscle health, finding that imbalances in protein synthesis, mitochondrial function, and inflammation accelerate muscle deterioration. Circadian-aligned lifestyle interventions and pharmacological therapies, such as REV-ERBα agonists, hold promise for mitigating the effects of...
Researchers have identified a new indicator of obesity risk in children by studying circadian rhythm-related genes. The study, published in the journal Nutrients, found that certain gene variations may increase caloric intake or from specific macronutrients.
Researchers analyzed UK Biobank data and found that night-active individuals had higher risks of major depressive disorder and anxiety disorders compared to daytime-active individuals. An early-morning-active phenotype was associated with lower MDD risk, while higher physical activity at certain times was linked to adverse outcomes.
A study of 87,577 adults found that average daytime light exposure above 1,000 lux reduced dementia risk by 16%. Longer exposure to bright light was associated with an even greater reduction in risk. Daytime light exposure was stronger predictor of dementia than established risk factors.
Researchers at The University of Osaka discovered that the cyanobacterial circadian clock is controlled by factors intrinsic to one protein, which remains stable under different conditions. This finding offers significant insight into how living organisms measure time.
Researchers found that patients who received immunochemotherapy before 3:00 pm experienced significantly longer progression-free survival and overall survival compared to those treated later. Earlier administration of immunotherapy was also associated with lower risks of cancer progression and death.
Researchers at Children's Hospital of Philadelphia found that circadian rhythms play a crucial role in boosting infection recovery in critically ill patients with respiratory viral infections. Maintaining a rhythmic meal schedule can mitigate the effects of disrupted light cycles and improve outcomes.
A comprehensive review synthesizes current insights into the intricate connections between gut microbiota and sleep regulation, highlighting the crucial role of peripheral organs in modulating brain function and behavior. Disruptions in gut microbiota composition are closely linked to sleep disturbances across multiple disorders.
A study published in Mayo Clinic Proceedings found that shift workers have a 15% higher risk of developing kidney stones, especially younger workers and those with low levels of manual labor. Lifestyle factors such as BMI, fluid intake, and smoking habits significantly contribute to the occurrence of kidney stones.
Researchers found that breast milk components like melatonin and cortisol vary over the course of the day. Labeling expressed milk as 'morning,' 'afternoon,' or 'evening' could help align feeding times with circadian signals, supporting infant sleep and immune development.
Dr. Randy J. Nelson's research reveals that artificial light exposure disrupts immune function, causes neuroinflammation, and influences mood regulation. His work has significant implications for understanding depression and anxiety disorders, as well as the obesity epidemic.
A study found that adolescents with self-reported evening preference, or 'night owl' tendencies, reported greater negative urgency and lack of perseverance, which are two aspects of impulsivity. The study suggests that unmeasured psychological or behavioral factors may be influencing both impulsivity and circadian preference.
Researchers have developed a new compound, SHP1705, that selectively attacks glioblastoma stem cells by hijacked circadian clock proteins. The compound was found to be safe and well-tolerated in humans during a phase 1 clinical trial.
A team of scientists has discovered that the circadian clock plays a crucial role in regulating F. oxysporum's response to zinc starvation and controlling secondary metabolism, enhancing its virulence. The study provides new insight into host-pathogen interactions and could lead to innovative approaches for crop protection.
Researchers found that whales and dolphins use a unique sleep strategy by turning off one half of their brain at a time. This phenomenon is enabled by specific genes and pathways that enable secondary aquatic adaptation.
Glioblastoma brain tumors synchronize their growth with the daily release of steroid hormones like cortisol, according to new research. Blocking these signals slows tumor growth and disease progression in animal models.
Researchers found that cyanobacteria use variations in pulse amplitude to convey information in single cells, regulating genes and controlling cellular processes. This discovery sheds light on how biological rhythms work together to coordinate cellular functions.
Researchers identify interleukin-17A as a key regulator of fat storage, carrying implications for addressing obesity and preventing wasting. The discovery highlights the interaction between the immune system and circadian rhythms, which may hold therapeutic potential for metabolic disorders.
A clinical trial found time-restricted eating improved blood sugar regulation and reduced markers of metabolic dysfunction in adults with metabolic syndrome. Participants who followed a customized eight-to-ten-hour eating window saw significant improvements compared to standard treatments.
A recent study published in PNAS explores how plants combine clock signals with environmental cues under naturally fluctuating conditions. The research team developed statistical models that accurately predict gene expression activity under control of circadian clock responses to environmental signals.
Scientists at Washington University in St. Louis have found that altering GABA receptor density affects circadian rhythm amplitude and synchrony among SCN cells. Reducing or mutating these receptors decreased the mice's daytime wheel-running and reduced nocturnal activity.
Researchers developed DNA aptamers of melanopsin to regulate mammalian circadian rhythms. Four Melapts induced a phase advance and seven caused a delay in the biological clocks of cells and mice. The aptamers may have potential therapeutic applications by manipulating melanopsin's input signals to the central clock.
Researchers have identified shared genetic links between disturbed sleep, neurodevelopmental and neuropsychiatric conditions. Polygenic scores for certain conditions are associated with chronotype and insomnia, suggesting potential new therapies.
The Sleep Research Society has recognized four individuals with its 2024 awards, honoring their exceptional contributions to sleep and circadian science, education, and public health. The winners include Dr. Elizabeth Klerman, Dr. David Raizen, Michael Perlis, and Julie Flygare.
Researchers have discovered that synchronization between the central circadian clock and peripheral clocks in muscle and skin is crucial for maintaining tissue function and preventing degenerative processes associated with aging. Time-restricted feeding can partially replace the central clock and enhance the autonomy of the muscle cloc...
Researchers found that intrinsically-photosensitive retinal ganglion cells (ipRGCs) use both microvillous and ciliary signaling mechanisms simultaneously. This discovery reveals a new pathway for transmitting light signals to the brain, which may have ancient origins on the evolutionary scale.
Researchers found that patients sleeping near windows slept better than those in other parts of the ward. Light exposure was also critical in regulating circadian rhythms, with short wavelength enriched morning light improving sleep quality. Fluctuations in noise levels negatively impacted sleep, emphasizing the need for noise mitigati...
Researchers from Osaka University have discovered a link between the rare D-form of the amino acid alanine and the circadian clock's influence on glucose metabolism in the kidney. The study found that D-alanine regulates gluconeogenesis, a process that creates new glucose to maintain energy levels, and is mediated by the protein Cry2.
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 found an association between altered circadian rest-activity rhythms and increased risk of frailty incidence in older adults. The study used wearable devices to detect variations suggestive of future frailty over six years before incidence.
Researchers are exploring new ways to fight metastasis, including the use of bacteria to activate a defensive response against cancer. Stress and changes in circadian rhythms have also been linked to metastasis, suggesting that these factors may be targets for prevention or treatment.
Researchers at UTHealth Houston are studying the impact of circadian rhythm on heart attacks and cardiac surgery, with a focus on identifying novel therapies to protect the heart. They will investigate the role of key genes and signaling pathways in modulating daytime variations in cardiac injury.
Researchers discovered BMAL1 is significantly upregulated in senescent cells and modulates the senescence program through AP-1. The study highlights a previously unappreciated role of BMAL1 in regulating cellular senescence and circadian clock components.
Researchers discovered that aging alters the pancreas's circadian rhythm by reorganizing its transcriptome. The study found that fibroblasts play a crucial role in regulating this reorganization, which affects the organ's resilience to aging-related pathologies.
A new study suggests that synchronizing internal clocks can help alleviate jet lag and age-related problems. Researchers found that eating a larger meal in the morning can help overcome jet lag, while constant nighttime eating can lead to misalignment between internal clocks.
Researchers developed a new mathematical model to study circadian rhythm resilience and develop ways to improve it in individuals with weak internal clocks. Sustained disruptions can lead to disorders like diabetes and memory loss.
A study by Florida Atlantic University and Duke University reveals that the malaria parasite's biological clock is 'in sync' with its human host's circadian clock. The researchers discovered a 'coupling' mechanism between the parasite and its host, which could lead to new treatments for this deadly disease.
Researchers found that malaria parasites synchronize their gene expression with the host's internal clock, repeating every 24 hours. The study reveals a potential new target for anti-malarial drugs by 'jet-lagging' the parasites' clocks.
A study by researchers from the University of Tsukuba found a key molecule involved in sleep homeostasis also plays a critical role in circadian behavior. The SIK3-HDAC4 pathway modulates the length of the circadian period through NMS-producing neurons, contributing to the sleep/wake rhythm.
Research reveals liver cells play a crucial role in regulating the body's internal circadian clock, influencing sleep patterns, hormone secretion, and metabolism. Studies on mice with humanized livers show that altered liver function can disrupt circadian rhythms, highlighting potential new treatments for metabolic diseases.
Researchers at UMass Chan Medical School identified the Bmal1 gene as a crucial regulator of circatidal behavior in P. hawaiensis, establishing a molecular link between circadian and circatidal clocks. The study provides new insights into the genetics underlying circatidal rhythms.
Researchers discovered a plant biological clock-regulated mechanism that helps plants tolerate cold temperatures and damage from bright light. The mechanism, controlled by the SIG5 gene, signals proteins in chloroplasts to protect against environmental stress, potentially improving crop resilience for colder climates.
Researchers at UC San Diego and UC Merced developed a high-throughput method to study the circadian clock in real time, shedding light on its internal functions. The study found that kinases play a crucial role in relaying the circadian rhythm from the core oscillator to gene expression.
The circadian rhythm governs most cellular functions implicated in cancer progression, making it an opportunity to intervene in the most timely and effective way. Leveraging this information, chronotherapy holds promise as a valuable alternative treatment option.
A recent study published in Current Biology found that the human body can predict regular mealtimes based on physiological changes. The research team discovered that daily blood glucose rhythms may be driven by both meal size and timing, suggesting a physiological drive for some people to eat at certain times.
A recent study published in Science Advances has deepened the understanding of circadian rhythm regulation in mammals. The research found that intracellular cyclic adenosine monophosphate (cAMP) is controlled by a neural network, whereas calcium ions are regulated by intracellular mechanisms.
Researchers at USC Keck School of Medicine found that liver cancer cells hijack circadian clock proteins to replicate and spread. Inhibiting these proteins can prevent cancer cell multiplication and potentially improve outcomes for patients with liver cancer.
Researchers found that time-restricted eating synchronizes circadian rhythms across multiple systems in mice, activating genes involved in specific diseases like cancer. Nearly 40% of genes in the adrenal gland and pancreas were affected by time-restricted eating, offering guidance for managing diseases.
Researchers found that students fell asleep later and woke up later in winter due to limited daytime light exposure. Daytime light exposure had a greater impact on circadian rhythms than evening light exposure.
Researchers at WashU Medicine identified a visual pathway in mice brains that is activated when animals see others scratching, triggering a reflex response. This discovery advances understanding of itching triggers and may point to solutions for itch-related conditions in humans.
Researchers at Scripps Research have discovered that chronic circadian disruption can increase lung cancer growth in animal models by activating the heat shock factor 1 (HSF1) pathway. This finding suggests a molecular link between disrupted sleep patterns, temperature changes, and tumor formation.
A study published in PLOS Biology reveals that glutamate signaling regulates the seasonal response of bean bugs' reproduction, controlled by circadian rhythm genes. The researchers found that extracellular glutamate levels were higher under short-day conditions and disrupted when reduced or increased.
Researchers at Nara Institute of Science and Technology found that the circadian clock regulates cell cycle progression and differentiation in Arabidopsis. The study used single-cell analysis to show that clock genes directly trigger cell differentiation, revealing a guiding role for the plant circadian clock in cell fate determination.
The study clarifies the role of photoperiodism in regulating rice flowering time. Phytochrome B makes connection between light and Evening Complex, while active ELF3-1 protein triggers late flowering. Evening Complex plays essential role in inducing flowering, with inactive proteins leading to no flowering.
Research reveals that healthy brain temperature varies significantly by brain region, age, sex, and time of day. Daily brain temperature cycles strongly correlate with survival in traumatic brain injury patients, suggesting potential improvements in understanding and treatment of brain injuries.
Buck Institute researchers found that dietary restriction can extend lifespan in fruit flies due to changes in their circadian rhythms, particularly in the eye. The study suggests that the eye plays a role in regulating lifespan, which may have implications for human health and aging.