Endocrine Abstracts

Quercetin and resveratrol, powerful antioxidants and blockers of intracellular mTOR signalling system, are widely distributed in edible plants. Their action on ovarian cell functions and the interrelationships with gonadotropin are studied insufficiently. We examined the effect of FSH, quercetin, resveratrol and their combinations on proliferation and apoptosis of cultured porcine ovarian granulosa cells. Accumulation of marker of proliferation (PCNA) and marker of apoptosis (...

The aim of our study was to examine the role of mTOR-dependent intracellular signalling pathway in tle control of ovarian functions. For this purpose we have examine the effect of two mTOR inhibitors (resveratrol and rapamycin) on the release of hormones by cultured rabbit ovarian fragments. The secretion of hormones (progesterone, testosterone, estradiol and prolactin) by fragments of rabbit ovaries cultured during 48 h with and without addition of resveratrol or rapamycine (...

The aim of our studies was to examine the effect of some food, drink and medical plants and their molecules on female ovarian endocrine and other functions in vitro and in vivo. We analysed the effects of plant (green tea, rooibos, ginkgo, flaxseed, chia, yukka) extracts and plant substances (green tea polyphenols, green tea epigallocatechin-3-gallate, curcumin, resveratrol, diadzein and diosgenin) on the release of hormones and markers of proliferation, apop...

The aim of our study was to examine the influence of green tea molecules on basic ovarian functions. For this purpose we have examine the effect of green tea extract, fraction of antioxidants (GTAO) and green tea fraction of polyphenols (GTPP) (at the doses 0, 1, 10, and 100 μg/ml) on proliferation, apoptosis, and steroidogenesis by cultured porcine ovarian granulosa cells. Markers of proliferation (PCNA) and apoptosis (bax) were detected by immunocytochemistry. Secretion...

The aim of our study was to elucidated the role of mTOR-dependent intracellular signalling pathway in control of ovarian functions. For this purpose, we have examine the effect of three mTOR inhibitors (resveratrol, curcumin and synthetic mTOR blocker MC 2183 – Mai et al. 20051, at the doses 0, 1, 10, 100 μg/ml) on apoptosis and steroidogenesis by cultured Japanese quail ovarian granulosa cells. The release of steroid hormones (progesterone and te...

Occurence of mycotoxins in various food and feed commodities is a worldwide problem. T-2 toxin is one of the most toxic trichothecene mycotoxin, produced mainly by Fusarium species. Poultry belongs to very sensitive species which are very often explored to toxic effects of mycotoxins. The aim of our in vitro studies was to examine secretion activity of ovarian granulossa cells to produce progesterone P4 after T-2 toxin and its combinations with res...