Search Results - "Gregoraszczuk, E.L"

Expression of ghrelin and the ghrelin receptor in different stages of porcine corpus luteum development and the inhibitory effects of ghrelin on progesterone secretion, 3β-hydroxysteroid dehydrogenase (3β-honestly significant difference (HSD)) activity and protein expression by Rak-Mardyła, A, Gregoraszczuk, E.L, Karpeta, A, Duda, M

“…Recent studies have suggested that ghrelin plays a direct role in controlling female reproduction. The aim of the present study was to investigate the mRNA and…”
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Effects of 2,2′,4,4′-tetrabromodiphenyl ether (BDE47) on the enzymes of phase I (CYP2B1/2) and phase II (SULT1A and COMT) metabolism, and differences in the action of parent BDE-47 and its hydroxylated metabolites, 5-OH-BDE-47 and 6-OH-BDE47, on steroid secretion by luteal cells by Gregoraszczuk, E.L, Dobrzanska, G, Karpeta, A

“…Highlights • Dependent on corpus luteum development expression of metabolizing enzymes. • Inhibitory action on CYP2B1/2, but no effect on SULT1A or COMT…”
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in vitroでの豚の成熟および発育段階の黄体におけるアポトーシスとGH,IGF-1誘導プロゲステロン分泌に対するレプチンの効果 by Gregoraszczuk, E.L, Ptak, A

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Expression of apelin and apelin receptor (APJ) in porcine ovarian follicles and in vitro effect of apelin on steroidogenesis and proliferation through APJ activation and different signaling pathways by Rak, A., Drwal, E., Rame, Ch, Knapczyk-Stwora, K., Słomczyńska, M., Dupont, J., Gregoraszczuk, E.L.

“…Apelin was thought to be an adipocyte-specific hormone, but recent studies indicate a link between apelin and female reproductive function. Using real-time…”
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Compounds of PAH mixtures dependent interaction between multiple signaling pathways in granulosa tumour cells by Zajda, K., Rak, A., Ptak, A., Gregoraszczuk, E.L.

“…[Display omitted] •Composition of PAH mixtures dependent. mechanism of action on CYP1A1 expression.•Activation of AhRR and NFkB in cells exposed for M1 and…”
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Thyrotropin stimulates progesterone secretion by luteal cells by activation of the camp/protein kinase a signaling system: A potential involvement of protein kinase C by Gregoraszczuk, E.L, Ziȩcik, A.J

“…Although the corpus luteum (CL) is not known as a target tissue for thyrotropin (TSH), this hormone increases progesterone production by porcine luteal cells…”
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Congener-specific action of PBDEs on steroid secretion, CYP17, 17β-HSD and CYP19 activity and protein expression in porcine ovarian follicles by Karpeta, A., Rak-Mardyła, A., Jerzak, J., Gregoraszczuk, E.L.

“…► PBDEs as endocrine disruptors in the ovary. ► Stimulatory action on testosterone secretion. ► Congeners specific activation of steroidogenic enzymes activity…”
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Activation of the enzymes of phase I (CYP2B1/2) and phase II (SULT1A and COMT) metabolism by 2,2′,4,4′-tetrabromodiphenyl ether (BDE47) in the pig ovary by Karpeta, A., Warzecha, K., Jerzak, J., Ptak, A., Gregoraszczuk, E.L.

“…► We analyzed the activity and expression of enzymes involved in phase I and phase II of BDE-47 metabolism. ► We showed that BDE-47 induce the first phase…”
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Hexachlorobenzene and pentachlorobenzene accumulation, metabolism and effect on steroid secretion and on CYP11A1 and CYP19 expression in cultured human placental tissue by Gregoraszczuk, E.L., Ptak, A., Karpeta, A., Fiedor, E., Wróbel, A., Milewicz, T., Falandysz, J.

“…•HCBz and PeCBz do not accumulate in placental tissue in vitro.•Fast induction of CYP1A1 activity and protein expression in the presence of HCBz, but later…”
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Congener-specific accumulation of polychlorinated biphenyls in ovarian follicular wall follows repeated exposure to PCB 126 and PCB 153. Comparison of tissue levels of PCB and biological changes by Gregoraszczuk, E.L., Grochowalski, A., Chrzaszcz, R., Wegiel, M.

“…Objective. Small (SF), medium (MF) and large (LF) preovulatory porcine follicles were isolated and incubated in an Erlenmeyer flask containing 5 ml of medium…”
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Effect of growth hormone and insulin-like growth factor-I on spontaneous apoptosis in cultured luteal cells collected from early, mature, and regressing porcine corpora lutea by Ptak, Anna, Kajta, Małgorzata, Gregoraszczuk, Ewa L.

“…The aim of the present study was to test the hypothesis that growth hormone (GH) and insulin-like growth factor-I (IGF-I) act at a local level to inhibit…”
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Estrogenic and antiestrogenic effect of in vitro treatment of follicular cells with 2,3,7,8-tetrachlorodibenzo- p-dioxin by Grochowalski, A, Chrza̧szcz, R, Pieklo, R, Gregoraszczuk, E.L

“…Objective. Two types of follicular cells from preovulatory ovary were cultured in vitro separately and in co-culture to test difference in…”
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Progesterone and estradiol secretion by porcine luteal cells is influenced by individual and combined treatment with prostaglandins E2 and F2a throughout the estrus cycle by Gregoraszczuk, E.L, Michas, N

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Effect of PCB 126 and PCB 153 on incidence of apoptosis in cultured theca and granulosa cells collected from small, medium and large preovulatory follicles by Gregoraszczuk, E.L, Sowa, M, Kajta, M, Ptak, A, Wójtowicz, A

“…The aim of the presented study was to evaluate the effects of PCB 126 and PCB 153 on granulosa and theca cell apoptosis. Granulosa and theca cells were…”
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In vitro effect of leptin on growth hormone (GH)- and insulin-like growth factor-I (IGF-I)-stimulated progesterone secretion and apoptosis in developing and mature corpora lutea of pig ovaries by Gregoraszczuk, E.L.(Jagiellonian Univ., Krakow (Poland)), Ptak, A

“…This study was designed to determine whether leptin modulates growth hormone (GH)-and insulin like growth factor-I (IGF-I)-stimulated progesterone (P4)…”
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Action of IGF-I on expression of the long form of the leptin receptor (ObRb) in the prepubertal period and throughout the estrous cycle in the mature pig ovary by Gregoraszczuk, E.L.(Jagiellonian Univ., Krakow (Poland)), Ptak, A, Wojciechowicz, T, Nowak, K

“…Leptin is an important satiety hormone and reproductive regulator found, along with its receptors, throughout the ovary. To date, the changes in ovarian…”
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Progesterone and estradiol secretion by porcine luteal cells is influenced by individual and combined treatment with prostaglandins E 2 and F 2a throughout the estrus cycle by Gregoraszczuk, E.L, Michas, N

“…The present experiments were conducted to test whether the ratio of PGE 2:PGF 2α affects steroid secretion by porcine luteal cells. We examined the effect of…”
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Response of porcine theca and granulosa cells to GH during short-term in vitro culture by Gregoraszczuk, Ewa L, Bylica, Agnieszka, Gertler, Arieh

“…In Experiment 1, the influence of exogenous GH on steroid secretion by granulosa and theca interna cells recovered from small (1–3 mm), medium (4–6 mm) and…”
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Placental lactogen as a regulator of luteal cells function during pregnancy in sheep by Gregoraszczuk, E.L., Zia, D., Wierzchoś, E., Murawski, M., Gertler, A.

“…The luteotropic activity of ovine placental lactogen (oPL) on different days of gestation in ewes was assessed using in vitro methods. Corpora lutea (CL)…”
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Thyroid hormone as a regulator of basal and human chorionic gonadotrophin-stimulated steroidogenesis by cultured porcine theca and granulosa cells isolated at different stages of the follicular phase by Gregoraszczuk, E L, Skalka, M

“…To characterize thyroid hormone action in the ovary, the direct effect of triiodothyronine (T3) was investigated in vitro using a culture system of porcine…”
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