Estrogen replacement therapy in postmenopausal women may reduce the risk of Alzheimer's disease, possibly by ameliorating neuronal degeneration. In the present study, we examined the neuroprotective spectrum of estrogen against excitotoxicity, oxidative stress, and serum-deprivation-induced apoptosis of neurons in mouse cortical cultures. 17beta-estradiol as well as 17alpha-estradiol and estron...

OBJECTIVES The present study aims at examining the motor coordination performance, serum and cerebellar estrogen, as well as ERβ levels, of ovariectomized rats (as menopausal model) following regular exercise. MATERIALS AND METHODS Ten female Sprague Dawley rats aged 12 weeks old were randomly divided into two groups; all of which underwent ovariectomy. The first group was treated with regula...

Estrogen plays an important role in the development of some cancers. However, previous studies on the influence of estrogen on colorectal cancer (CRC) have had conflicting conclusions, and there have been few reports on estrogens and liver metastasis. The aim of this study was to explore the prognostic impact of estrogens on CRC with liver metastasis. Eighty-six patients with CRC including 43 s...

BACKGROUND The up- and down-regulation of the osteoclastogenesis response depends on the estrogen/estrogen receptor (ER) signaling pathway. Previous reports have shown that the promoter hypermethylation and gene polymorphism of ERα are risks for menopausal osteoporosis. No previous study has evaluated the expression levels of ERα mRNA in menopausal osteoporosis using human subjects. We hypothes...

Evidence suggests that sex differences in response to cocaine administration may be regulated by activation of progesterone and estrogen receptors. To test this hypothesis, rats were pretreated with either RU 486 (progesterone antagonist; 0, 3, or 25 mg/kg), tamoxifen (estrogen antagonist; 0, 1, or 3 mg/kg), or vehicle followed by saline or cocaine administration (15 mg/kg). Although RU 486 did...

In four acromegalic patients, estrogen therapy did not significantly alter the mean values of basal radioimmunoassayable plasma growth hormone. In two patients, estrogen therapy did not qualitatively alter the lack of reduction of plasma growth hormone levels after oral administration of glucose, nor did it reduce in these patients the response of plasma growth hormone to insulin-induced hypogl...

Estrogen is a key hormone in human reproductive physiology, controlling ovulation and secondary sexual characteristics. In addition, it plays an important role in the pathogenesis of breast cancer. Indeed, estrogen receptor antagonists and aromatase inhibitors (which block estrogen biosynthesis) are primary drugs used for treatment and prevention in at-risk populations. Despite its importance, ...

Arzoxifene ([6-hydroxy-3-[4-[2-(1-piperidinyl)-ethoxy]phenoxy]-2-(4-methoxyphenyl)]benzo[b]thiophene) is a selective estrogen receptor modulator (SERM) that is a potent estrogen antagonist in mammary and uterine tissue while acting as an estrogen agonist to maintain bone density and lower serum cholesterol. Arzoxifene is a highly effective agent for prevention of mammary cancer induced in the r...

Background: Pyometra or cystic endometrial hyperplasia complex in dogs is a hormonally mediated bacterial disease wherein middle-aged bitches are most affected. The current study was carried out pyometra-affected to determine the alterations hormonal, histopathological and haemato-biochemical profiles after 14 days of ovariohysterectomy. Methods: Blood samples were collected both from control (...

Women with benign proliferative breast disease (BPBD) are at increased risk for developing breast cancer. Evidence suggests that accumulation of adipose tissue can influence breast cancer development via hyperinsulinemia, increased estrogen, and/or inflammation. However, there are limited data investigating these pathways with respect to risk of BPBD. We evaluated serologic markers from these p...