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The Association Between Early Progesterone Rise and Serum Estradiol Levels as Well as Endometrial Thickness in IVF Cycles.

Background/Objectives: The success of artificial reproductive technologies (ARTs) depends on different factors, such as patient-specific reproductive features, ovarian response to stimulation, oocyte and embryo quality, and endometrial receptivity. This study aimed to evaluate their association with oocyte yield, fertilization, endometrial thickness, and pregnancy outcomes. Methods: A prospective clinical study included 128 women undergoing IVF/ICSI. Baseline hormone levels (E2, P4, FSH, LH, AMH) were assessed prior to stimulation. E2 levels were monitored during stimulation, and P4 was measur

Perinatal nutritional effects on postpubertal secretion of gonadotropins and feedback responsiveness to estradiol-17β in sexually mature heifers.

Developmental changes in response to nutritional extremes may in some cases be manifested later in adult life. Objectives of experiments reported herein were to test the hypotheses that maternal nutrition during mid- to late-gestation interacts with postnatal nutrition during the juvenile period in heifers to impact (1) tonic secretion of gonadotropins, and (2) estradiol-17β (E2) negative and positive feedback responsiveness in adulthood. Heifers were selected from a larger population programmed nutritionally using a 3 × 2 factorial arrangement of pre- and postnatal diets. Beginning at 90 d of…

Defining the LH surge in natural cycle frozen-thawed embryo transfer: the role of LH, estradiol, and progesterone.

OBJECTIVE: Several replacement protocols for frozen-thawed ET (FET) exist, with no advantage of one protocol over the others. In the present … ients who conceived and those who did not, including the % changes in LH (D- 1 minus D- 2/D- 2), in estradiol (D- 2 minus D- 1/D- 2) and % change in progesterone (D- 1 minus D- 2/D- 2) levels. RESULTS: Six hundreds and sixty-eight NC FET cycles were performed during the study periods. Pregnancy was achieved in 348 patients (pregnancy rate, 52% per cycle). …

Эстрадиол содействует ремонту Myelin в Spinal Cord of Women Mice в CXCR4 Chemokine Receptor-Nependent.

В центральной нервной системе для взрослых (ЦНС) регенерация миелина происходит главным образом за счет дифференциации клеток олигодендроцитов потомства на зрелые олигодендроциты. У мужчин снижение уровня тестостерона ускоряет развитие множественных склерозов (МС), в то время как у женщин менопауза усугубляет инвалидность, связанную с НР. Ранее мы продемонстрировали, что функциональные яички и тестостерон необходимы для спонтанной ремимиилации фокус-лизолицитина (LPC), вызванной демиелином повреждения позвоночника мужских мышей. Ремонт миелина на основе тестостерона зависел от введения хемокин

Совпадение в аннотации оригинала
In the adult central nervous system (CNS), myelin regeneration primarily occurs through the differentiation of oligodendrocyte progenitor ce … n-receptor signaling and CXCR4 signaling. In the present study, we investigated whether ovaries and estradiol have a comparable key role in female mice. Ovariectomy prevents, the appearance of astrocytes, while treatment with estradiol enhances astrocyte numbers and promotes remyelination by oligodendrocytes within the LPC-demyelinated lesion. Unlike testos …

The additive effect of 17β-estradiol on the modulation of electrochemotherapy with calcium ions or cisplatin in human clear carcinoma cells.

Calcium electroporation (CaEP) is an efficient approach for ovarian cancer treatment. It causes cell death by introducing elevated levels of calcium into cells. In this work, the research focused on two types of cell lines: CHO-K1, representing normal ovary cells, and OvBH-1, representing ovarian clear carcinoma cells. Those cell lines exhibited distinct reactions to calcium electroporation (CaEP). Also, we have evaluated the effects of 17β-estradiol following CaEP and electrochemotherapy (ECT) with cisplatin (CPP). The combination of ECT with CPP and CaEP with prior E2 preincubation resulted …

Protective effects of 17-β-estradiol on liver injury: The role of TLR4 signaling pathway and inflammatory response.

Liver injury, a major global health issue, stems from various causes such as alcohol consumption, nonalcoholic steatohepatitis, obesity, diabetes, metabolic syndrome, hepatitis, and certain medications. The liver's unique susceptibility to ischemia and hypoxia, coupled with the critical role of the gut-liver axis in inflammation, underscores the need for effective therapeutic interventions. The study highlights E2's interaction with estrogen receptors (ERs) and its modulation of the Toll-like receptor 4 (TLR4) signaling pathway as key mechanisms in mitigating liver injury. Activation of TLR4 l

Antidepressant effects of activation of infralimbic cortex via upregulation of BDNF and β-catenin in an estradiol withdrawal model.

RATIONALE: Clinical and preclinical studies have demonstrated that estradiol withdrawal after delivery is one of important factors involved in the pathogenesis of postpartum depression (PPD). The infralimbic cortex (IL) is related to anxiety and mood disorders. Whether IL neurons mediate PPD is still unclear. OBJECTIVES: This study was to observe the antidepressant effect and expression of BDNF and β-catenin in IL by allopregnanolone (ALLO) treatment or the selective activation or inhibition of IL neurons using a chemogenetic approach in a pseudopregnancy model of PPD. METHODS: Administratio…

Membrane estrogen receptor α signaling modulates the sensitivity to estradiol treatment in a dose- and tissue- dependent manner.

Estradiol (E2) affects both reproductive and non-reproductive tissues, and the sensitivity to different doses of E2 varies between tissues. Membrane estrogen receptor α (mERα)-initiated signaling plays a tissue-specific role in mediating E2 effects, however, it is unclear if mERα signaling modulates E2 sensitivity. To determine this, we treated ovariectomized C451A females, lacking mERα signaling, and wildtype (WT) littermates with physiological (0.05 μg/mouse/day (low); 0.6 μg/mouse/day (medium)) or supraphysiological (6 μg/mouse/day (high)) doses of E2 (17β-estradiol-3-benzoate) for three we…

Effectiveness and Safety of Different Estradiol Regimens in Transgender Women (TREAT Study): Protocol for a Randomized Controlled Trial.

BACKGROUND: Current guidelines for gender-affirming hormone therapy (GAHT) for transgender women are mostly based on clinical experience from experts in the field and treatments used on postmenopausal women. While care is currently provided with the best available evidence, there is a critical gap in knowledge about the safest and most effective estradiol routes of administration for GAHT in transgender women; this statement is supported by the World Professional Association for Transgender Health on their Standards of Care for the Health of Transgender and Gender Diverse People, version 8. Fu…

Estradiol- and Progesterone-Associated Changes in microRNA-Induced Silencing and Reduced Antiseizure Efficacy of an Antagomir in Female Mice.

About one-third of individuals living with epilepsy have treatment-resistant seizures. Alternative therapeutic strategies are thus urgently … ty and the silencing of Kv4.2 in the brain were differentially correlated with plasma levels of 17β-estradiol and progesterone. Our results suggest that hormonal fluctuations in sexually mature female mice influence miRNA-induced silencing and could alter the efficacy of potential future miRNA-based treatments for epilepsy in females.

Acute progesterone feedback on gonadotropin secretion is not demonstrably altered in estradiol-pretreated women with polycystic ovary syndrome.

Women with polycystic ovary syndrome (PCOS) demonstrate gonadotropin-releasing hormone (GnRH) pulse generator resistance to suppression with 7 days of progesterone and estradiol administration. It remains unknown whether such women demonstrate impairments in acute progesterone negative feedback on LH pulse frequency or progesterone positive feedback on gonadotropin release. This was a randomized, double-blind, placebo-controlled crossover study designed to test the hypothesis that acute, progesterone-related suppression of LH pulse frequency and progesterone-related augmentation of gonadotropi…

Assessment of selected molecular factors and 17-β estradiol dosage in response to Toxoplasma gondii infection in swine.

BACKGROUND AND AIM: Toxoplasma gondii is a global zoonotic parasite infecting virtually all warm-blooded species, although a species-specifi … were selected, and their transcription was assessed in various tissues by quantitative RT-PCR. 17-β estradiol concentrations were assessed by fluorimetric enzyme-linked immunoassay and the AIA-360 automated immunoassay analyzer. Blood count and hematochemical analyses were performed by a blood cell counter and a spectrophotometer, respectively. RESULTS: Th …

The medial preoptic area and acute cocaine's stimulant effects in rats: Potential influences of estradiol and biological sex.

The medial preoptic area (mPOA) in the hypothalamus is an important integrator of neuroendocrine signaling and a key regulator of both natur … for the effects of gonadal hormones, rats were left gonadally intact and categorized as either 'low-estradiol' or 'high-estradiol' based on their hormonal status on test day. Results indicate that high-estradiol females experienced greater cocaine-induced mPOA Fos-immunoreactivity (Fos-ir) and displayed greater cocaine-induced locomotion than low estradiol …

Identification of Altered Proteins in the Plasma of Rats With Chronic Prostatic Inflammation Induced by Estradiol Benzoate and Sex Hormones.

The cause of nonbacterial chronic prostatitis is unknown, yet its prevalence accounts for more than 90% of all prostatitis cases. Whole blood, plasma, and serum have been used to identify prostate cancer biomarkers; however, few studies have performed protein profiling to identify prostatitis biomarkers. The purpose of this study was to identify protein biomarkers altered by chronic prostatitis. To perform the study, we chemically induced chronic prostate inflammation in Sprague Dawley rats using estradiol benzoate (EB), testosterone (T), and estradiol (E) and then examined protein levels in t…

The effects of estradiol are modulated in a tissue-specific manner in mice with inducible inactivation of ERα after sexual maturation.

Mouse models with lifelong inactivation of estrogen receptor-α (ERα) show that ERα is the main mediator of estrogenic effects in bone, thymu … thalamus, in CAGG-Cre-ERαflox/flox (inducible ERαKO) compared with ERαflox/flox (control) mice. 17β-estradiol (E2) treatment increased trabecular bone volume fraction (BV/TV), cortical bone area, and uterine weight, while it reduced thymus weight and fat mass in ovariectomized control mice. The estrogenic responses were substantially reduced in inducible ER …

Regional distributions of UDP-glucuronosyltransferase activities toward estradiol and serotonin in the liver and small intestine of cynomolgus macaques.

The cynomolgus macaque is a nonhuman primate species that is often used in drug metabolism studies during drug development. However, the localization of UDP-glucuronosyltransferases (UGTs), essential drug-metabolizing enzymes, has not been fully investigated in the liver and small intestine of cynomolgus macaques. In this study, UGT activities were analyzed in liver (five lobes) and small intestine (the duodenum and six sections from the proximal jejunum to the distal ileum) using typical probe substrates of human UGTs: 7-hydroxycoumarin, estradiol, serotonin, propofol, and zidovudine. In live…

Bitter taste signaling mediated by Tas2r144 is down-regulated by 17β-estradiol and progesterone in the rat choroid plexus.

The blood-cerebrospinal fluid barrier is constituted by choroid plexus epithelial cells (CPEC) that regulate molecular trafficking between the blood and the cerebrospinal fluid. We hypothesize that taste receptors expressed in CPEC monitor the composition of these body fluids in a sex hormone dependent way. Thus, we compared the expression of taste related genes in the choroid plexus of sham and ovariectomized female rats, and then studied the effect of 17β-estradiol and progesterone in their expression and function. We found that the bitter receptors Tas2r109, Tas2r144, and the taste-related …

Effect of chronic pretreatment with 17β-estradiol and/or progesterone on the nociceptive response to uterine cervical distension in a rat model.

It is widely known that visceral pain is more prevalent in women than in men, and this phenomenon is interpreted as a consequence of the gonadal hormone modulation of pain perception and transduction. Uterine cervical distension might cause obstetric and gynecologic pain with clinical relevance to visceral pain. In this study, we focused on the roles of 17β-estradiol and progesterone in visceral nociception with the use of a rat model of uterine cervical distension. Female ovariectomized rats were injected with 17β-estradiol (E2) or progesterone (P4) for 21 days, after which visceral pain-indu…

Combined surgical and medical treatment in an adolescent with severe gynecomastia due to excessive estradiol secretion: a case report.

BACKGROUND: Gynecomastia develops due to the reversed estradiol-to-Testosterone ratio in adolescence, and symptoms typically improve within 2 years. The causes vary widely, including estrogen excess and tumors, and surgical treatment is usually given in late adolescence because postoperative symptoms may recur in adolescents. This study reports a case of a pediatric patient with severe gynecomastia due to excessive estradiol secretion who showed a positive outcome after receiving surgical treatment combined with aromatase inhibitor administration. CASE PRESENTATION: A 9-year old boy visited t…

An estradiol-independent BDNF-NPY cascade is involved in the antidepressant effect of mechanical acupuncture instruments in ovariectomized rats.

Menopause-related depression devastates women's quality of life after middle age. Previous research has shown that estrogen hormone therapy … NF) and neuropeptide Y (NPY) release increased in the hippocampus in response to MAI treatment, but estradiol levels did not recover. Furthermore, microinjection of the BDNF receptor antagonist ANA-12 (0.1 pmol/1 μl) into the hippocampus before MAI stimulation significantly suppressed the recovery of NPY levels. Taken together, these findings indicate that …