Background: Phytoestrogens, a group of plant-derived polyphenolic compounds have recently come into considerable attention due to the increasing information on their potential adverse effects in human health. Some of phytoestrogens show estrogenic activity that may be carcinogenic for human. In the present study, we investigated the transcriptional effects of variety of phytoestrogens&nbsp...

Background: Estrogen-negative breast cancers have different clinical course, prognostic features and treatment response in comparison to estrogen receptor-positive (ER-positive) breast cancers. Human epidermal growth factor receptor 2 (HER2) oncoprotein has found to have a pivotal role in natural cell growth and cell division and is suggested to be directly related to tumor invasiveness in brea...

Postmenopausal women represent a vulnerable population towards endocrine disruptors due to hormonal deficit. We previously demonstrated that chronic exposure of ovariectomized C57Bl6/J mice fed high-fat, high-sucrose diet low-dose mixture chemicals with one dioxin, polychlorobiphenyl, phthalate, and bisphenol A triggered metabolic alterations in the liver but intestine was not explored. Yet, ga...

: Phytoestrogens are estrogen analogues of plant origin, allowing them to act as agonists at receptors.

Estrogen receptor function can drive cyclin D1 expression and proliferation in human breast cancer cells (MCF-7). Recent studies showing that estrogen receptor-positive epithelial cells in the human mammary gland are nonproliferative suggest that the direct mitogenic effect of estrogen on mammary epithelial cells may be acquired during breast cancer development. Because estrogen-dependent cycli...

Background: The fracture healing is impaired in osteoporosis. Piper sarmentosum is a plant, which contains potent antioxidant, naringenin that may enhance fracture healing. The present histological study aimed to determine the effects of water extract of Piper sarmentosum on the late phase of fracture healing in estrogen-deficient rats. Methods: Twenty four female Sprague-Dawley rats (2...

results serum estradiol levels tended to have a negative correlation with homeostasis model assessment of insulin resistance (homa-ir) in premenopausal women but not in postmenopausal women. on the other hand, free testosterone levels tended to have a positive correlation with homa-ir in postmenopausal women but not in premenopausal women. serum shbg levels showed significant negative correlati...

Recent studies have shown that the Bcl-2 protein suppresses programmed cell death or apoptosis induced by a variety of stimuli including chemotherapeutic drugs. Because estrogen promotes the survival of estrogen-dependent breast cancer cells in vivo, we investigated whether estrogen might regulate levels of Bcl-2 gene expression in an estrogen-responsive human breast cancer cell line. Estrogen ...

Clinical observations suggest that postmenopausal women have a higher incidence of aneurysmal rupture than premenopausal women. We hypothesize that a relative deficiency in estrogen may increase the risks of aneurysmal growth and subarachnoid hemorrhage in postmenopausal women. We assessed the effects of estrogen and selective estrogen receptor subtype agonists on the development of aneurysmal ...

Background: Methamphetamine (METH) is one of the most popular psychostimulants which produce long lasting learning and memory impairment. Previous studies have indicated that estrogen and progesterone replacement therapy attenuate cognitive impairment against a wide array of neurodegenerative diseases. Present study was designed to figure out the effects of estrogen, progesterone alone or in co...