Articles tagged with Estrogen
A study found that nicotine from a single cigarette reduces estrogen production in women's brains, which may explain their greater resistance to quitting smoking. The effect was observed in the thalamus, part of the limbic system involved in behavioral responses.
A new study found that traumatic experiences are associated with lower concentrations of estrogens estrone and estradiol in postmenopausal women. The relationship between trauma and hormones depends on sleep duration, with women experiencing low levels of estrogens who get less than 6 hours of sleep per night
A Rutgers study finds CBD improves glucose disposal, burns energy, and enhances bone density in estrogen-deficient mice. The compound also reduces inflammation and boosts beneficial gut bacteria.
Recent evidence suggests hormone therapy at menopause does not significantly increase the risk of invasive breast cancer. However, estrogen combined with progesterone increases breast cancer risk for women with an intact uterus. Menopause experts offer reassurance to women and their healthcare providers about the safety of hormone ther...
A large study of over 296,000 patients found that being overweight was negatively associated with dementia in women, while underweight was positively linked to an increased risk of dementia in men. The results suggest that moderate weight gain may be beneficial for cognitive health in older women.
A large cohort study found that hormone replacement therapy for breast cancer survivors is not associated with an increased risk of recurrence. The study included over 8,400 Danish postmenopausal women and found no link between vaginal estrogen or menopausal hormone therapy and breast cancer reoccurrence.
A $3.1 million grant will enable researchers to collaborate on a prospective study investigating early signs of heart vessel damage in young, pre-menopausal breast cancer survivors. The CROWN study aims to identify biomarkers that correlate with cardiovascular risk and develop strategies to lower the risk of irreversible heart disease.
A study published in PLOS ONE found an association between reduced estrogen and progesterone levels and increased risk of snoring and obstructive sleep apnea in postmenopausal women. Low estrogen levels were linked to a 19% decreased odds of snoring, while low progesterone levels were associated with a 9% decrease.
A population-based study found that patients with estrogen receptor-positive breast cancer who experienced hot flashes while on adjuvant hormone therapy had worse outcomes and a higher risk of early treatment discontinuation. The study suggests that managing side effects may not be enough to prevent treatment discontinuation, highlight...
A University of Jyväskylä study found that menopausal women's ability to use fat as an energy source is not impaired by estrogen levels or menopause. Women who burned more fat during exercise had higher fitness and physical activity levels, while those with better glucose tolerance did not necessarily burn more fat.
Research led by Texas A&M AgriLife scientist Shaodong Guo found that estrogen protects female mice from cardiomyopathy and death, reversing the effects of insulin resistance. The study suggests that estrogen replacement therapy may be a feasible treatment option for diabetic cardiomyopathy.
Researchers at West Virginia University are studying the mechanisms behind Alzheimer's disease and PTSD, using animal models to investigate how stressful events affect brain cells. They aim to understand the role of estrogen and high-cholesterol diet in developing the disease.
The study examines how estrogen regulates the brain's bioenergetic system, which affects glucose transport and metabolism. Researchers aim to understand changes in this system during menopause and its potential link to age-associated neurodegenerative diseases like Alzheimer's disease.
A new study found that hormone replacement therapy within six months of COVID-19 diagnosis was associated with a 78% reduction in all-cause mortality in women. This suggests estrogen may offer protective effects against COVID-19 severity, explaining the lower hospitalization and death rates among women compared to men.
Researchers found that hormone fluctuations, particularly estrogen, shape brain development and behavior. Estrogen influences the growth of brain regions, leading to permanent changes in neural circuitry.
Patients with lower levels of sex hormones are more likely to undergo surgery for rotator cuff tears, according to a study published in The Journal of Bone & Joint Surgery. Estrogen deficiency was associated with a 48% higher incidence of rotator cuff repair in women, while testosterone deficiency was linked to an 89% higher rate in men.
A study of 273,240 women found that life events influencing estrogen levels may be linked to a higher risk of dementia. Ever having been pregnant or having had an abortion was associated with a lower risk, while early or late menopause increased the risk.
A study published in PLOS Medicine found that certain reproductive events, such as shorter estrogen exposure, may be associated with increased dementia risk in women. However, the association between the number of children and dementia risk was similar for women and men, suggesting social and behavioral factors may play a role.
Researchers found that female mice produce more of the FPR2 protein, which helps prevent NAFLD, and that estrogen mediates its production. This discovery highlights the need for sex-balanced animal experiments and could lead to novel treatments and gender-based therapies for NASH
Researchers at Clemson University have identified a genetic variation associated with congenital idiopathic megaesophagus (CIM) in German shepherd dogs, which is often fatal if left untreated. A genetic test using melanin-concentrating hormone receptor 2 and dog's sex can predict the risk of CIM with 75% accuracy.
A study found that arterial stiffness increases with age, but hormonal fluctuations also play a role. Women's hormone levels, particularly estradiol and follicle-stimulating hormone, were associated with stiffer arteries, while older women had stiffer vessels regardless of hormone status.
A study of over 200,500 women found an increased risk of death in younger pre-menopausal women when ovaries and fallopian tubes were removed during surgery. In contrast, the procedure is safer for older post-menopausal women, whose ovaries have already stopped producing estrogen.
A new study suggests that greater cumulative estrogen exposure in life may counter the brain-shrinking effect of menopause. Women with longer reproductive years, more children, and hormone therapy showed increased gray matter volume in certain brain areas. This protective effect may help reduce Alzheimer's risk in women.
Researchers have identified a novel estrogen compound that provides benefits similar to hormone replacement therapy but without the risk factors associated with it. The compound has been shown to reduce excess lipid deposition in the liver and prevent the progression of fibrosis, which can lead to liver failure and metabolic problems.
Researchers identify key neurons and signaling pathway regulating female activity before ovulation. Discoveries could lead to new treatments for menopause that sidestep estrogen and reactivates the circuit with CRISPRa technology.
A new study found that women whose menstrual cycle length increased two years before menopause had better vascular health than those with stable cycles. Changes in cycle length may predict cardiovascular disease risk, allowing clinicians to recommend preventive strategies.
Research shows that estrogen replacement during menopause reduces the risk of bone fractures, diabetes, and cancer, but increases stroke, blood clots, and breast/ovarian cancer risk. The quality of systematic reviews on MHT is mixed, with some findings inconclusive.
Recent study by Okayama University researchers reveals three photoinitiators cause faster increase in breast tumor growth in mice, with tamoxifen pretreatment reducing toxicity. The findings suggest photoinitiators could act as hormonal disruptions, raising concerns for patients and healthy individuals.
Researchers at Duke University Medical Center identified a mechanism where breast cancer cells use cholesterol to develop tolerance to stress, allowing them to resist ferroptosis and proliferate. This finding highlights the importance of lowering cholesterol in preventing cancer progression and offers new approaches for treatment.
Lobular breast cancer patients often experience recurrence or metastasis despite hormonal therapies. CU Cancer Center researcher Matthew Sikora is studying the role of MDC1 in this subtype, finding it linked to estrogen receptor activity and potentially a novel target for treatment.
A new study identifies hundreds of chemicals that may increase breast cancer risk by stimulating hormone production. The chemicals include pesticides and ingredients in personal care products.
Researchers have identified stearic acid and ornithine as indicators of coronary microvascular disease (CMD), a condition that damages blood vessels and causes decreased blood flow to the heart muscle. The study suggests that estrogen may also play a role in CMD development, particularly in postmenopausal women.
A study published in JAMA found that the age at natural menopause has increased in US women over the past 60 years, with a corresponding increase in reproductive life span. The research suggests that longer reproductive life spans may be associated with better metabolic health outcomes due to prolonged estrogen exposure.
Researchers at Rensselaer Polytechnic Institute have developed a polymerized estrogen biomaterial that shows promise as a treatment for spinal cord injuries. The study found enhanced neuroprotection in preclinical mouse models with implanted polymerized estrogen, suggesting a potential therapeutic approach.
Researchers at Texas A&M University discovered that cytisine reduces dopamine neuron loss in females, providing potential evidence for treating Parkinson's disease. The protective effect of cytisinex occurred only in female animal models, and combining it with estrogen produced a stronger effect.
A new study found that estrogen deficiency during menopause leads to altered microRNA signalling in skeletal muscle, potentially activating cell death pathways and resulting in muscle wasting. The study suggests resistance training may be beneficial for maintaining muscle mass and power in middle-aged women.
A daily oral combination therapy has been found to be reliable, safe and effective for long-term treatment of uterine fibroids. The therapy, which combines relugolix with small doses of estrogen and synthetic progesterone, led to dramatic improvements in fibroid-related measures such as volume of menstrual blood loss and pain.
A new imaging test can reliably distinguish breast cancer patients who are unlikely to benefit from hormone therapy. The test measures estrogen receptor functionality, and a PET scan detects increased progesterone receptors in response to estrogen stimulation.
Researchers found that oral hormone therapy alters the metabolome of postmenopausal women, with estrogen-alone therapy providing a protective effect against cardiovascular disease. The study also identified metabolites associated with increased CHD risk in combination therapy.
Females in this primate species mature faster after a new male arrives, with some maturing earlier than expected. The researchers observed that these females were previously suppressed from maturing due to their fathers' presence.
Researchers found that some PFASs mimic estrogen's ability to activate transcription, while others inhibit expression, but block natural hormone activity when present. A computational model predicted that PFASs bind to distinct sites on the receptor surface, potentially blocking estrogen's action
A University of Cincinnati biologist found that even small concentrations of estrogen in water can lead to a gender ratio imbalance and smaller fish populations. The study used least killifish, which have live young, and found that exposure to estrogen resulted in more females than males.
Researchers found that a modified bentonite complex can remove 17α-ethinylestradiol and other pharmaceutical organic micropollutants from wastewater environments. The study demonstrates an effective and cost-efficient method for removing synthetic estrogen from bodies of water.
Researchers found that estrogen receptor beta is essential for female skeletal muscle growth and regeneration, promoting muscle stem cell proliferation and inhibiting cell death. In contrast, male mice lacking the ERβ gene did not show impaired muscle regenerative capacity, suggesting a gender-specific mechanism.
Fetal estrogens, such as estetrol and estriol, show promising characteristics in reducing hot flashes and improving cardiovascular health. They may also provide added benefits that have yet to be fully explored, making them a promising new approach to hormone therapy.
A Northwestern University study has identified the specific regions of brain tissue where a key gene named aromatase regulates male sexual behavior in mice. Aromatase converts testosterone to estrogen, driving male sexual activity. The discovery could lead to new treatments for disorders of low and compulsive sexual desire.
When brain oxygen is low, neurons produce estrogen that activates astrocytes to increase cell signaling, release neuroprotective factors, and clear neurotoxins. Astrocyte activation is critical for brain protection, and researchers have found that neuron-derived estrogen is essential for this process.
A PET imaging study found that low aromatase enzyme activity in the brain's amygdala is associated with higher BMI and lower self-control. Estrogen production in the amygdala may regulate feeding behavior, influencing BMI.
A PET brain imaging study found that low aromatase levels in the amygdala are associated with higher BMI and lower self-control. The results suggest a novel method for characterizing estrogen's role in obesity and impairments in self-regulation.
A review of preclinical data suggests estrogen lowers ACE2 levels, which may explain why women experience milder symptoms. Higher ACE2 levels in men could account for worse outcomes.
A study by Tufts University researchers found that estrogen can have a disruptive effect on glucose metabolism in females, but not males, when a specific protein is absent. The study identified a key protein in the brain that mediates these effects and provides insight into the differences between men and women in their risk of diabetes.
A large study of middle-aged women found that physical activity helps slow the decline in muscle mass during menopausal transition. The research, conducted by the University of Jyväskylä, measured muscle size in perimenopausal and postmenopausal states.
Research suggests fluctuating estrogen levels make alcohol more rewarding to female mice, potentially increasing susceptibility to alcohol use disorders. Activating estrogen receptors increases dopamine release and binge drinking behavior in female mice.
A recent study published in the Journal of Neuroscience found that high estrogen levels may increase feelings of reward in response to alcohol in female mice. The research suggests that treatment for alcohol use disorder may be more effective if sex differences are considered.
Research suggests that low levels of sex hormone-binding globulin (SHBG) may be associated with an increased risk of ischemic stroke in postmenopausal women. The study, which examined data from over 13,000 women, found that those with the lowest SHBG levels were 51% more likely to have had a stroke.
A study found that individual mammalian cells in a population fail to respond synchronously to estrogen stimulation, neither do individual gene copies. However, a small molecule inhibitor increased the response of individual alleles to hormone, establishing a previously unrecognized mode of regulation at the single cell level.
A new study has found that spaying dogs reduces their risk of developing mammary tumors, but may increase the risk of more aggressive cancers. Higher serum estrogen levels in spayed animals with mammary tumors were associated with longer times to metastasis and improved survival times.
Researchers at Rensselaer Polytechnic Institute have developed a biomaterial that polymerizes estrogen to protect and potentially regenerate nervous system cells damaged by spinal cord injuries. The slow-releasing biomaterial targets injured tissue, reducing further damage and promoting regeneration.
Researchers have discovered that zearalenone, a widespread food estrogen, can pass through the placenta and affect fetal development. The study found that even low concentrations of zearalenone can have a significant impact on the unborn child's hormonal balance.
A single cholesterol-derived molecule, 27-hydroxycholesterol (27HC), has been found to increase body fat even without a high-fat diet. The molecule affects white adipose tissue and expands the capacity of existing fat cells.