Articles tagged with Leptin
Researchers successfully transplanted young neurons into diseased brain circuitry, repairing defective circuits and enabling mice to respond to leptin. This breakthrough suggests new therapeutic approaches for conditions like spinal cord injury, autism, and Parkinson's disease.
Researchers at Monash University have discovered how leptin-resistance develops in overweight and obese individuals. The study reveals that targeting only one of the negative regulators won't be enough to increase leptin-sensitivity in obesity, suggesting that all three regulators might need to be switched off.
Leptin's antiobesity effects are attributed to modulation of inhibitory output via GABA neurons, which suppress appetite and energy expenditure.
A new study published by The Endocrine Society reveals that women with higher levels of the hormone leptin experience fewer symptoms of depression. This finding suggests that leptin may have antidepressant qualities and is independent of body mass index (BMI).
Researchers found that PTPe inhibits certain molecules, dampening the leptin signal and reducing appetite and increasing physical activity. The discovery suggests that inhibiting PTPe might help reestablish the leptin response in obese humans with leptin insensitivity.
Researchers at Beth Israel Deaconess Medical Center have found that a synthetic form of leptin can restore fertility and reduce the risk of bone fractures in lean women with hypothalamic amenorrhea. The study shows significant improvements in hormone levels, menstrual cycles, and bone density after treatment with metreleptin.
Research published in The Journal of Physiology found a link between maternal and offspring obesity in lambs, shedding light on the mechanisms of human obesity. Hormonal changes, including leptin and cortisol, were observed in lambs born to obese mothers, suggesting a predisposition to increased appetite and obesity.
Researchers at UT Southwestern Medical Center discovered a brain signaling pathway that induces leptin resistance, leading to decreased satiety and increased visceral fat. Activating this pathway, known as cAMP-EPAC, can induce leptin resistance in hypothalamic neurons, a critical site of leptin action.
A new peptide has demonstrated efficacy against triple negative breast cancer, extending average survival time by 80% compared to chemotherapy. The leptin receptor antagonist peptide targets a protein that promotes cancer development in obese individuals.
A study found that leptin resistance, common in diabetes, helps prevent the development of acute respiratory distress syndrome (ARDS) and acute lung injury (ALI). Leptin resistance reduces the formation of inflexible tissue that develops in ALI and ARDS.
Researchers found that obese mothers who lost weight before pregnancy had healthier male offspring with reduced triglycerides and insulin resistance. The study suggests pre-pregnancy dietary intervention can reverse adverse metabolic effects of maternal obesity on offspring.
A new study reveals that individuals with high leptin and low ghrelin levels are more likely to regain weight after dieting. Researchers analyzed the role of hormones in weight recovery and found a significant association between plasma levels of ghrelin, leptin, and insulin.
A study by Mayo Clinic researchers identifies LRP1, a lipoprotein receptor, as a co-receptor with the leptin receptor that regulates appetite and metabolism. Mice engineered to lack LRP1 gained weight and became obese, indicating its critical role in lipid metabolism and energy balance.
Researchers pinpointed the ventral premammillary nucleus as a key site in the brain where leptin acts to trigger puberty in females. This finding sheds light on the potential impact of childhood obesity on the onset of puberty, particularly in girls.
A team of researchers found that the hormone leptin's effects on puberty onset are not mediated by kisspeptins as previously thought. Instead, leptin's signaling is relayed by a specific brain region, potentially leading to new therapeutic strategies for disorders related to puberty and fertility.
A Saint Louis University study found that curcumin eliminated the effects of leptin on activating hepatic stellate cells, which short-circuited the development of liver damage. The researchers discovered a potential therapy for treating and preventing liver fibrosis associated with non-alcoholic steatohepatitis (NASH).
Researchers at UT Southwestern Medical Center found that infusing leptin into the brain of mice with type 1 diabetes reversed lethal consequences and improved metabolism. The study suggests a novel role for the brain in mediating beneficial actions of leptin, potentially leading to new therapies for individuals with type 1 diabetes.
Research suggests adiponectin inhibits leptin-induced migration of liver cancer cells, slowing tumor growth and improving disease-free survival. The study's findings offer a promising therapy for obese liver cancer patients by targeting the oncogenic actions of leptin.
A new study found that higher baseline leptin and lower ghrelin plasma levels before dieting may predict weight regain in individuals. The research suggests that personalized weight-loss programs targeting appetite hormones could improve long-term success rates.
Research reveals leptin's role in reducing food intake by activating the hippocampus, a brain region controlling learning and memory. Impaired leptin signaling may compromise cognitive processes that inhibit excessive food consumption.
A recent study has linked leptin action in the brain to sepsis survival. Researchers found that leptin mediates actions in the central nervous system, improving the host response to a standard model of sepsis.
Researchers at UT Southwestern Medical Center found that leptin administration showed better management of blood-sugar variability and lipogenesis, the conversion of simple sugars into fatty acids. Leptin therapy also reduced food intake and increased lean body mass in non-obese type 1 diabetic mice.
Researchers found prescribed opioids associated with significant overdose risk. Leptin therapy holds promise for long-term weight loss. Atrial fibrillation risk is lower with certain antihypertensives, while higher statin doses may not always prevent coronary artery disease.
Researchers have identified a leptin-controlled gene that can reverse diabetes in animals and may have similar therapeutic effects in humans. The study found that low levels of leptin can correct insulin resistance and diabetes without causing significant weight loss.
A study found that individuals with higher leptin levels had a reduced incidence of Alzheimer's disease and dementia. Higher leptin levels were also associated with increased total cerebral brain volume.
Researchers from Boston University School of Medicine found that higher leptin levels are associated with a lower incidence of Alzheimer's Disease and dementia. The study suggests that leptin may have beneficial effects on brain development and function, potentially opening pathways for preventive and therapeutic interventions.
Researchers found overexpression of leptin receptor in 80% of thyroid cancer samples, associated with poor disease survival, older age, larger tumor size, advanced stage, and metastasis. Leptin's role in stimulating growth and preventing death in cancer cells was also observed.
A new Duke University study has found that leptin plays a crucial role in determining whether obese mice develop arthritis, regardless of their weight. The absence of leptin was shown to prevent osteoarthritis in obese mice, with healthier joint appearance compared to normal control mice.
Researchers found that obesity did not lead to knee osteoarthritis in mice with leptin deficiency. Leptin hormone levels were high in obese individuals, but the study suggests it may protect against OA development. Further studies on leptin's role in preventing knee OA are recommended.
A recent study published in Cell by Yale School of Medicine researchers identified a novel brain pathway where leptin regulates bone mass and suppresses appetite through serotonin pathways. The findings contradict the prevailing view that leptin primarily acts in the hypothalamus.
Researchers at Columbia University Medical Center have identified a previously unknown leptin-serotonin pathway in the brain that simultaneously promotes appetite and bone mass accrual. The discovery reveals that leptin acts on serotonin in the brain stem, increasing appetite and bone mass.
Researchers at Medical College of Georgia have found that deleting or mutating the gene PTP1B puts mice at risk for hypertension by interfering with an endogenous mechanism that should prevent it. The study suggests that PTP1B is a vulnerability gene, and its status could help identify individuals at risk for hypertension.
A study found that obese individuals and those with pre-diabetes have high levels of SPARC, a protein linked to fat tissue scarring. This scarring can prevent proper fat storage, increasing the risk of type 2 diabetes.
A new study in Cell Metabolism has found that leptin, a hormone produced by fat tissue, influences baseline dopamine levels and our motivation to eat. Leptin-responsive neurons in the brain's lateral hypothalamic area feed into the mesolimbic dopamine system, controlling motivation for food, sex, and other desires.
Scientists discover that restoring leptin sensitivity to a specific area of POMC neurons in the brain's hypothalamus can cure severe diabetes and increase activity levels in mice. The findings suggest a new therapeutic pathway for treating insulin-resistant diabetes, potentially stimulating exercise willpower.
A University of Illinois study has found that a hormone present in fat tissue plays a key role in regulating the immune system and aiding recovery from hypoxia. Leptin triggers an increase in anti-inflammatory molecules, leading to faster recovery times in obese mice.
Researchers at UT Southwestern Medical Center have found that a natural brain chemical called orexin works by increasing the body's sensitivity to leptin, leading to reduced weight gain. Increased orexin levels in mice also boosted metabolism and resulted in greater weight loss when administered with leptin.
A new mathematical model of physiological regulation of body weight suggests several steady states to which an animal's weight tends to gravitate, rather than a single set point. The model combines aspects of two competing theories and accounts for leptin resistance, suggesting new strategies for weight loss.
Researchers discovered that immune cells producing opioids can alleviate neuropathic pain in mice. Meanwhile, a study found that Vitamin D3 might boost the efficacy of cancer immunotherapies by targeting specific immune cells.
A new study by Harvard Medical School researchers found that two FDA-approved drugs can restore leptin sensitivity in obese mice, potentially treating obesity. The drugs, PBA and TUDCA, act as ER stress reducers and sensitize the brain's hypothalamus to leptin.
Children's researchers found that ER stress and unfolded-protein response block leptin action in the brain; chemical chaperones can re-sensitize the brain to leptin, leading to significant weight loss. Leptin-sensitizing agents may bring new hope for obesity treatment
Researchers found that leptin enlists the sympathetic nervous system to prevent bone-making cells from releasing osteocalcin, which stimulates insulin release. This back-door route could lead to a new treatment for diabetes using osteocalcin.
Researchers at Columbia University Medical Center discovered a chemical that counters the negative impact of leptin on drug-eluting stents used in diabetic patients. This finding could lead to improved outcomes for diabetics who receive stents.
Hormones produced by fat cells stimulate breast cancer cell migration and invasion, while a class of drugs called EGFR inhibitors can block these effects, potentially blunting aggressive tumor behavior in triple negative breast cancer patients.
New study finds direct link between obesity and increased leptin levels, leading to damage similar to hypertension and diabetes. Leptin stimulates greater production of superoxide, creating toxic molecules that harm endothelial cells.
A new study reveals that fructose consumption can induce leptin resistance, leading to weight gain when combined with a high-fat diet. Leptin resistance developed silently, without obesity, and was associated with higher triglyceride levels in the blood.
Researchers at Salk Institute discover a master switch in the brain that controls both appetite and fertility. Variations in the TORC1 gene may contribute to obesity and infertility, and could be regulated with a novel drug. The study also reveals that leptin plays a crucial role in regulating these processes.
Researchers found that leptin can lower blood glucose levels and maintain them in a normal range for extended periods. The study shows promise for treating type 1 diabetes without insulin injections.
Researchers found that changes in brain activity in response to food cues were altered after weight loss, but not when treated with leptin. This suggests that low leptin levels serve as a protective mechanism against weight regain.
A recent study published by the Endocrine Society found that exercise does not suppress appetite in obese women, unlike lean women. Obese women showed no significant reduction in leptin levels during intense exercise, which is essential for appetite suppression and weight loss.
Researchers found that pairing leptin with a minor amount of exercise revived the hormone's ability to fight fat, preventing weight gain in obese rats. The study suggests that low-level exercise triggered a metabolic change that cleared the way for leptin to work effectively.
A new study from Ohio State University found that conjugated linoleic acid (CLA) may need to be paired with the hormone leptin to prevent side effects of rapid weight loss. The study used mice genetically engineered to have no leptin, finding that CLA diets can result in weight loss but also insulin resistance.
Researchers have identified a potential mechanism for treating multiple sclerosis using IFN-beta, which reduces disease in a mouse model by inducing IL-27 secretion. Meanwhile, a new study on sickle cell disease suggests that bosentan prevents organ damage by inhibiting endothelin receptor activation. Leptin signaling also plays a cruc...
Researchers found an association between leptin resistance and high blood pressure in people with Bardet-Biedl syndrome, a rare genetic disorder. Leptin resistance disrupts brain signals that regulate appetite and metabolism.
Researchers at Michigan State University have discovered that an appetite-controlling hormone named leptin also affects the immune system, while natural versions of certain steroids do not. Leptin supports white blood cell production and enhances immune function in obese individuals.
Researchers propose that pika leptin's adaptive functional evolution may be driven by cold environmental stress, not hypoxia. This discovery has significant implications for understanding small mammals' adaptation to extreme environments and identifying new candidate therapies for human diseases like obesity and diabetes.
Researchers found that antimalarial drug chloroquine effectively prevents cancer in mouse models of two distinct human cancer syndromes, Burkitt lymphoma and ataxia telangiectasia. Chloroquine inhibited the development of Myc-induced lymphomas and mediated its effects through autophagy and lysosomal stress.
A new study found that leptin can delay the onset of seizures in rodents, suggesting it may be a key player in how a ketogenic diet combats epilepsy. The authors propose dietary changes and intranasal administration of leptin as potential treatments.
A new study found that obese women's chances of spontaneous pregnancy are reduced by up to 43%, even if they ovulate normally and have no obvious infertility reasons. The study suggests that obesity may disrupt hormone levels, including leptin, which regulates appetite and energy expenditure.
A study by UCLA researchers has identified brain circuits involved in hunger that are influenced by leptin, a hormone produced by fat cells. Leptin supplementation reduced activation in regions linked to hunger while enhancing activation in regions linked to inhibition and satiety in three adults with congenital leptin deficiency.